diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index 1137af1259..d12300ea76 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "1.97.2"
+  ".": "1.98.0"
 }
\ No newline at end of file
diff --git a/.stats.yml b/.stats.yml
index 2dc4f680a9..e7fb0bdf9b 100644
--- a/.stats.yml
+++ b/.stats.yml
@@ -1,4 +1,4 @@
 configured_endpoints: 111
-openapi_spec_url: https://storage.googleapis.com/stainless-sdk-openapi-specs/openai%2Fopenai-b2a451656ca64d30d174391ebfd94806b4de3ab76dc55b92843cfb7f1a54ecb6.yml
-openapi_spec_hash: 27d9691b400f28c17ef063a1374048b0
-config_hash: e822d0c9082c8b312264403949243179
+openapi_spec_url: https://storage.googleapis.com/stainless-sdk-openapi-specs/openai%2Fopenai-721e6ccaa72205ee14c71f8163129920464fb814b95d3df9567a9476bbd9b7fb.yml
+openapi_spec_hash: 2115413a21df8b5bf9e4552a74df4312
+config_hash: 9606bb315a193bfd8da0459040143242
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 945e224cf9..669d5a5792 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,13 @@
 # Changelog
 
+## 1.98.0 (2025-07-30)
+
+Full Changelog: [v1.97.2...v1.98.0](https://github.com/openai/openai-python/compare/v1.97.2...v1.98.0)
+
+### Features
+
+* **api:** manual updates ([88a8036](https://github.com/openai/openai-python/commit/88a8036c5ea186f36c57029ef4501a0833596f56))
+
 ## 1.97.2 (2025-07-30)
 
 Full Changelog: [v1.97.1...v1.97.2](https://github.com/openai/openai-python/compare/v1.97.1...v1.97.2)
diff --git a/pyproject.toml b/pyproject.toml
index 5b59053d02..6765611fc2 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "openai"
-version = "1.97.2"
+version = "1.98.0"
 description = "The official Python library for the openai API"
 dynamic = ["readme"]
 license = "Apache-2.0"
diff --git a/src/openai/_version.py b/src/openai/_version.py
index 59fb46ac23..ca890665bc 100644
--- a/src/openai/_version.py
+++ b/src/openai/_version.py
@@ -1,4 +1,4 @@
 # File generated from our OpenAPI spec by Stainless. See CONTRIBUTING.md for details.
 
 __title__ = "openai"
-__version__ = "1.97.2"  # x-release-please-version
+__version__ = "1.98.0"  # x-release-please-version
diff --git a/src/openai/resources/chat/completions/completions.py b/src/openai/resources/chat/completions/completions.py
index 739aa662d4..c851851418 100644
--- a/src/openai/resources/chat/completions/completions.py
+++ b/src/openai/resources/chat/completions/completions.py
@@ -248,8 +248,10 @@ def create(
         parallel_tool_calls: bool | NotGiven = NOT_GIVEN,
         prediction: Optional[ChatCompletionPredictionContentParam] | NotGiven = NOT_GIVEN,
         presence_penalty: Optional[float] | NotGiven = NOT_GIVEN,
+        prompt_cache_key: str | NotGiven = NOT_GIVEN,
         reasoning_effort: Optional[ReasoningEffort] | NotGiven = NOT_GIVEN,
         response_format: completion_create_params.ResponseFormat | NotGiven = NOT_GIVEN,
+        safety_identifier: str | NotGiven = NOT_GIVEN,
         seed: Optional[int] | NotGiven = NOT_GIVEN,
         service_tier: Optional[Literal["auto", "default", "flex", "scale", "priority"]] | NotGiven = NOT_GIVEN,
         stop: Union[Optional[str], List[str], None] | NotGiven = NOT_GIVEN,
@@ -388,6 +390,10 @@ def create(
               whether they appear in the text so far, increasing the model's likelihood to
               talk about new topics.
 
+          prompt_cache_key: Used by OpenAI to cache responses for similar requests to optimize your cache
+              hit rates. Replaces the `user` field.
+              [Learn more](https://platform.openai.com/docs/guides/prompt-caching).
+
           reasoning_effort: **o-series models only**
 
               Constrains effort on reasoning for
@@ -406,6 +412,12 @@ def create(
               ensures the message the model generates is valid JSON. Using `json_schema` is
               preferred for models that support it.
 
+          safety_identifier: A stable identifier used to help detect users of your application that may be
+              violating OpenAI's usage policies. The IDs should be a string that uniquely
+              identifies each user. We recommend hashing their username or email address, in
+              order to avoid sending us any identifying information.
+              [Learn more](https://platform.openai.com/docs/guides/safety-best-practices#safety-identifiers).
+
           seed: This feature is in Beta. If specified, our system will make a best effort to
               sample deterministically, such that repeated requests with the same `seed` and
               parameters should return the same result. Determinism is not guaranteed, and you
@@ -481,9 +493,11 @@ def create(
 
               We generally recommend altering this or `temperature` but not both.
 
-          user: A stable identifier for your end-users. Used to boost cache hit rates by better
-              bucketing similar requests and to help OpenAI detect and prevent abuse.
-              [Learn more](https://platform.openai.com/docs/guides/safety-best-practices#end-user-ids).
+          user: This field is being replaced by `safety_identifier` and `prompt_cache_key`. Use
+              `prompt_cache_key` instead to maintain caching optimizations. A stable
+              identifier for your end-users. Used to boost cache hit rates by better bucketing
+              similar requests and to help OpenAI detect and prevent abuse.
+              [Learn more](https://platform.openai.com/docs/guides/safety-best-practices#safety-identifiers).
 
           web_search_options: This tool searches the web for relevant results to use in a response. Learn more
               about the
@@ -520,8 +534,10 @@ def create(
         parallel_tool_calls: bool | NotGiven = NOT_GIVEN,
         prediction: Optional[ChatCompletionPredictionContentParam] | NotGiven = NOT_GIVEN,
         presence_penalty: Optional[float] | NotGiven = NOT_GIVEN,
+        prompt_cache_key: str | NotGiven = NOT_GIVEN,
         reasoning_effort: Optional[ReasoningEffort] | NotGiven = NOT_GIVEN,
         response_format: completion_create_params.ResponseFormat | NotGiven = NOT_GIVEN,
+        safety_identifier: str | NotGiven = NOT_GIVEN,
         seed: Optional[int] | NotGiven = NOT_GIVEN,
         service_tier: Optional[Literal["auto", "default", "flex", "scale", "priority"]] | NotGiven = NOT_GIVEN,
         stop: Union[Optional[str], List[str], None] | NotGiven = NOT_GIVEN,
@@ -668,6 +684,10 @@ def create(
               whether they appear in the text so far, increasing the model's likelihood to
               talk about new topics.
 
+          prompt_cache_key: Used by OpenAI to cache responses for similar requests to optimize your cache
+              hit rates. Replaces the `user` field.
+              [Learn more](https://platform.openai.com/docs/guides/prompt-caching).
+
           reasoning_effort: **o-series models only**
 
               Constrains effort on reasoning for
@@ -686,6 +706,12 @@ def create(
               ensures the message the model generates is valid JSON. Using `json_schema` is
               preferred for models that support it.
 
+          safety_identifier: A stable identifier used to help detect users of your application that may be
+              violating OpenAI's usage policies. The IDs should be a string that uniquely
+              identifies each user. We recommend hashing their username or email address, in
+              order to avoid sending us any identifying information.
+              [Learn more](https://platform.openai.com/docs/guides/safety-best-practices#safety-identifiers).
+
           seed: This feature is in Beta. If specified, our system will make a best effort to
               sample deterministically, such that repeated requests with the same `seed` and
               parameters should return the same result. Determinism is not guaranteed, and you
@@ -752,9 +778,11 @@ def create(
 
               We generally recommend altering this or `temperature` but not both.
 
-          user: A stable identifier for your end-users. Used to boost cache hit rates by better
-              bucketing similar requests and to help OpenAI detect and prevent abuse.
-              [Learn more](https://platform.openai.com/docs/guides/safety-best-practices#end-user-ids).
+          user: This field is being replaced by `safety_identifier` and `prompt_cache_key`. Use
+              `prompt_cache_key` instead to maintain caching optimizations. A stable
+              identifier for your end-users. Used to boost cache hit rates by better bucketing
+              similar requests and to help OpenAI detect and prevent abuse.
+              [Learn more](https://platform.openai.com/docs/guides/safety-best-practices#safety-identifiers).
 
           web_search_options: This tool searches the web for relevant results to use in a response. Learn more
               about the
@@ -791,8 +819,10 @@ def create(
         parallel_tool_calls: bool | NotGiven = NOT_GIVEN,
         prediction: Optional[ChatCompletionPredictionContentParam] | NotGiven = NOT_GIVEN,
         presence_penalty: Optional[float] | NotGiven = NOT_GIVEN,
+        prompt_cache_key: str | NotGiven = NOT_GIVEN,
         reasoning_effort: Optional[ReasoningEffort] | NotGiven = NOT_GIVEN,
         response_format: completion_create_params.ResponseFormat | NotGiven = NOT_GIVEN,
+        safety_identifier: str | NotGiven = NOT_GIVEN,
         seed: Optional[int] | NotGiven = NOT_GIVEN,
         service_tier: Optional[Literal["auto", "default", "flex", "scale", "priority"]] | NotGiven = NOT_GIVEN,
         stop: Union[Optional[str], List[str], None] | NotGiven = NOT_GIVEN,
@@ -939,6 +969,10 @@ def create(
               whether they appear in the text so far, increasing the model's likelihood to
               talk about new topics.
 
+          prompt_cache_key: Used by OpenAI to cache responses for similar requests to optimize your cache
+              hit rates. Replaces the `user` field.
+              [Learn more](https://platform.openai.com/docs/guides/prompt-caching).
+
           reasoning_effort: **o-series models only**
 
               Constrains effort on reasoning for
@@ -957,6 +991,12 @@ def create(
               ensures the message the model generates is valid JSON. Using `json_schema` is
               preferred for models that support it.
 
+          safety_identifier: A stable identifier used to help detect users of your application that may be
+              violating OpenAI's usage policies. The IDs should be a string that uniquely
+              identifies each user. We recommend hashing their username or email address, in
+              order to avoid sending us any identifying information.
+              [Learn more](https://platform.openai.com/docs/guides/safety-best-practices#safety-identifiers).
+
           seed: This feature is in Beta. If specified, our system will make a best effort to
               sample deterministically, such that repeated requests with the same `seed` and
               parameters should return the same result. Determinism is not guaranteed, and you
@@ -1023,9 +1063,11 @@ def create(
 
               We generally recommend altering this or `temperature` but not both.
 
-          user: A stable identifier for your end-users. Used to boost cache hit rates by better
-              bucketing similar requests and to help OpenAI detect and prevent abuse.
-              [Learn more](https://platform.openai.com/docs/guides/safety-best-practices#end-user-ids).
+          user: This field is being replaced by `safety_identifier` and `prompt_cache_key`. Use
+              `prompt_cache_key` instead to maintain caching optimizations. A stable
+              identifier for your end-users. Used to boost cache hit rates by better bucketing
+              similar requests and to help OpenAI detect and prevent abuse.
+              [Learn more](https://platform.openai.com/docs/guides/safety-best-practices#safety-identifiers).
 
           web_search_options: This tool searches the web for relevant results to use in a response. Learn more
               about the
@@ -1061,8 +1103,10 @@ def create(
         parallel_tool_calls: bool | NotGiven = NOT_GIVEN,
         prediction: Optional[ChatCompletionPredictionContentParam] | NotGiven = NOT_GIVEN,
         presence_penalty: Optional[float] | NotGiven = NOT_GIVEN,
+        prompt_cache_key: str | NotGiven = NOT_GIVEN,
         reasoning_effort: Optional[ReasoningEffort] | NotGiven = NOT_GIVEN,
         response_format: completion_create_params.ResponseFormat | NotGiven = NOT_GIVEN,
+        safety_identifier: str | NotGiven = NOT_GIVEN,
         seed: Optional[int] | NotGiven = NOT_GIVEN,
         service_tier: Optional[Literal["auto", "default", "flex", "scale", "priority"]] | NotGiven = NOT_GIVEN,
         stop: Union[Optional[str], List[str], None] | NotGiven = NOT_GIVEN,
@@ -1104,8 +1148,10 @@ def create(
                     "parallel_tool_calls": parallel_tool_calls,
                     "prediction": prediction,
                     "presence_penalty": presence_penalty,
+                    "prompt_cache_key": prompt_cache_key,
                     "reasoning_effort": reasoning_effort,
                     "response_format": response_format,
+                    "safety_identifier": safety_identifier,
                     "seed": seed,
                     "service_tier": service_tier,
                     "stop": stop,
@@ -1615,8 +1661,10 @@ async def create(
         parallel_tool_calls: bool | NotGiven = NOT_GIVEN,
         prediction: Optional[ChatCompletionPredictionContentParam] | NotGiven = NOT_GIVEN,
         presence_penalty: Optional[float] | NotGiven = NOT_GIVEN,
+        prompt_cache_key: str | NotGiven = NOT_GIVEN,
         reasoning_effort: Optional[ReasoningEffort] | NotGiven = NOT_GIVEN,
         response_format: completion_create_params.ResponseFormat | NotGiven = NOT_GIVEN,
+        safety_identifier: str | NotGiven = NOT_GIVEN,
         seed: Optional[int] | NotGiven = NOT_GIVEN,
         service_tier: Optional[Literal["auto", "default", "flex", "scale", "priority"]] | NotGiven = NOT_GIVEN,
         stop: Union[Optional[str], List[str], None] | NotGiven = NOT_GIVEN,
@@ -1755,6 +1803,10 @@ async def create(
               whether they appear in the text so far, increasing the model's likelihood to
               talk about new topics.
 
+          prompt_cache_key: Used by OpenAI to cache responses for similar requests to optimize your cache
+              hit rates. Replaces the `user` field.
+              [Learn more](https://platform.openai.com/docs/guides/prompt-caching).
+
           reasoning_effort: **o-series models only**
 
               Constrains effort on reasoning for
@@ -1773,6 +1825,12 @@ async def create(
               ensures the message the model generates is valid JSON. Using `json_schema` is
               preferred for models that support it.
 
+          safety_identifier: A stable identifier used to help detect users of your application that may be
+              violating OpenAI's usage policies. The IDs should be a string that uniquely
+              identifies each user. We recommend hashing their username or email address, in
+              order to avoid sending us any identifying information.
+              [Learn more](https://platform.openai.com/docs/guides/safety-best-practices#safety-identifiers).
+
           seed: This feature is in Beta. If specified, our system will make a best effort to
               sample deterministically, such that repeated requests with the same `seed` and
               parameters should return the same result. Determinism is not guaranteed, and you
@@ -1848,9 +1906,11 @@ async def create(
 
               We generally recommend altering this or `temperature` but not both.
 
-          user: A stable identifier for your end-users. Used to boost cache hit rates by better
-              bucketing similar requests and to help OpenAI detect and prevent abuse.
-              [Learn more](https://platform.openai.com/docs/guides/safety-best-practices#end-user-ids).
+          user: This field is being replaced by `safety_identifier` and `prompt_cache_key`. Use
+              `prompt_cache_key` instead to maintain caching optimizations. A stable
+              identifier for your end-users. Used to boost cache hit rates by better bucketing
+              similar requests and to help OpenAI detect and prevent abuse.
+              [Learn more](https://platform.openai.com/docs/guides/safety-best-practices#safety-identifiers).
 
           web_search_options: This tool searches the web for relevant results to use in a response. Learn more
               about the
@@ -1887,8 +1947,10 @@ async def create(
         parallel_tool_calls: bool | NotGiven = NOT_GIVEN,
         prediction: Optional[ChatCompletionPredictionContentParam] | NotGiven = NOT_GIVEN,
         presence_penalty: Optional[float] | NotGiven = NOT_GIVEN,
+        prompt_cache_key: str | NotGiven = NOT_GIVEN,
         reasoning_effort: Optional[ReasoningEffort] | NotGiven = NOT_GIVEN,
         response_format: completion_create_params.ResponseFormat | NotGiven = NOT_GIVEN,
+        safety_identifier: str | NotGiven = NOT_GIVEN,
         seed: Optional[int] | NotGiven = NOT_GIVEN,
         service_tier: Optional[Literal["auto", "default", "flex", "scale", "priority"]] | NotGiven = NOT_GIVEN,
         stop: Union[Optional[str], List[str], None] | NotGiven = NOT_GIVEN,
@@ -2035,6 +2097,10 @@ async def create(
               whether they appear in the text so far, increasing the model's likelihood to
               talk about new topics.
 
+          prompt_cache_key: Used by OpenAI to cache responses for similar requests to optimize your cache
+              hit rates. Replaces the `user` field.
+              [Learn more](https://platform.openai.com/docs/guides/prompt-caching).
+
           reasoning_effort: **o-series models only**
 
               Constrains effort on reasoning for
@@ -2053,6 +2119,12 @@ async def create(
               ensures the message the model generates is valid JSON. Using `json_schema` is
               preferred for models that support it.
 
+          safety_identifier: A stable identifier used to help detect users of your application that may be
+              violating OpenAI's usage policies. The IDs should be a string that uniquely
+              identifies each user. We recommend hashing their username or email address, in
+              order to avoid sending us any identifying information.
+              [Learn more](https://platform.openai.com/docs/guides/safety-best-practices#safety-identifiers).
+
           seed: This feature is in Beta. If specified, our system will make a best effort to
               sample deterministically, such that repeated requests with the same `seed` and
               parameters should return the same result. Determinism is not guaranteed, and you
@@ -2119,9 +2191,11 @@ async def create(
 
               We generally recommend altering this or `temperature` but not both.
 
-          user: A stable identifier for your end-users. Used to boost cache hit rates by better
-              bucketing similar requests and to help OpenAI detect and prevent abuse.
-              [Learn more](https://platform.openai.com/docs/guides/safety-best-practices#end-user-ids).
+          user: This field is being replaced by `safety_identifier` and `prompt_cache_key`. Use
+              `prompt_cache_key` instead to maintain caching optimizations. A stable
+              identifier for your end-users. Used to boost cache hit rates by better bucketing
+              similar requests and to help OpenAI detect and prevent abuse.
+              [Learn more](https://platform.openai.com/docs/guides/safety-best-practices#safety-identifiers).
 
           web_search_options: This tool searches the web for relevant results to use in a response. Learn more
               about the
@@ -2158,8 +2232,10 @@ async def create(
         parallel_tool_calls: bool | NotGiven = NOT_GIVEN,
         prediction: Optional[ChatCompletionPredictionContentParam] | NotGiven = NOT_GIVEN,
         presence_penalty: Optional[float] | NotGiven = NOT_GIVEN,
+        prompt_cache_key: str | NotGiven = NOT_GIVEN,
         reasoning_effort: Optional[ReasoningEffort] | NotGiven = NOT_GIVEN,
         response_format: completion_create_params.ResponseFormat | NotGiven = NOT_GIVEN,
+        safety_identifier: str | NotGiven = NOT_GIVEN,
         seed: Optional[int] | NotGiven = NOT_GIVEN,
         service_tier: Optional[Literal["auto", "default", "flex", "scale", "priority"]] | NotGiven = NOT_GIVEN,
         stop: Union[Optional[str], List[str], None] | NotGiven = NOT_GIVEN,
@@ -2306,6 +2382,10 @@ async def create(
               whether they appear in the text so far, increasing the model's likelihood to
               talk about new topics.
 
+          prompt_cache_key: Used by OpenAI to cache responses for similar requests to optimize your cache
+              hit rates. Replaces the `user` field.
+              [Learn more](https://platform.openai.com/docs/guides/prompt-caching).
+
           reasoning_effort: **o-series models only**
 
               Constrains effort on reasoning for
@@ -2324,6 +2404,12 @@ async def create(
               ensures the message the model generates is valid JSON. Using `json_schema` is
               preferred for models that support it.
 
+          safety_identifier: A stable identifier used to help detect users of your application that may be
+              violating OpenAI's usage policies. The IDs should be a string that uniquely
+              identifies each user. We recommend hashing their username or email address, in
+              order to avoid sending us any identifying information.
+              [Learn more](https://platform.openai.com/docs/guides/safety-best-practices#safety-identifiers).
+
           seed: This feature is in Beta. If specified, our system will make a best effort to
               sample deterministically, such that repeated requests with the same `seed` and
               parameters should return the same result. Determinism is not guaranteed, and you
@@ -2390,9 +2476,11 @@ async def create(
 
               We generally recommend altering this or `temperature` but not both.
 
-          user: A stable identifier for your end-users. Used to boost cache hit rates by better
-              bucketing similar requests and to help OpenAI detect and prevent abuse.
-              [Learn more](https://platform.openai.com/docs/guides/safety-best-practices#end-user-ids).
+          user: This field is being replaced by `safety_identifier` and `prompt_cache_key`. Use
+              `prompt_cache_key` instead to maintain caching optimizations. A stable
+              identifier for your end-users. Used to boost cache hit rates by better bucketing
+              similar requests and to help OpenAI detect and prevent abuse.
+              [Learn more](https://platform.openai.com/docs/guides/safety-best-practices#safety-identifiers).
 
           web_search_options: This tool searches the web for relevant results to use in a response. Learn more
               about the
@@ -2428,8 +2516,10 @@ async def create(
         parallel_tool_calls: bool | NotGiven = NOT_GIVEN,
         prediction: Optional[ChatCompletionPredictionContentParam] | NotGiven = NOT_GIVEN,
         presence_penalty: Optional[float] | NotGiven = NOT_GIVEN,
+        prompt_cache_key: str | NotGiven = NOT_GIVEN,
         reasoning_effort: Optional[ReasoningEffort] | NotGiven = NOT_GIVEN,
         response_format: completion_create_params.ResponseFormat | NotGiven = NOT_GIVEN,
+        safety_identifier: str | NotGiven = NOT_GIVEN,
         seed: Optional[int] | NotGiven = NOT_GIVEN,
         service_tier: Optional[Literal["auto", "default", "flex", "scale", "priority"]] | NotGiven = NOT_GIVEN,
         stop: Union[Optional[str], List[str], None] | NotGiven = NOT_GIVEN,
@@ -2471,8 +2561,10 @@ async def create(
                     "parallel_tool_calls": parallel_tool_calls,
                     "prediction": prediction,
                     "presence_penalty": presence_penalty,
+                    "prompt_cache_key": prompt_cache_key,
                     "reasoning_effort": reasoning_effort,
                     "response_format": response_format,
+                    "safety_identifier": safety_identifier,
                     "seed": seed,
                     "service_tier": service_tier,
                     "stop": stop,
diff --git a/src/openai/resources/responses/responses.py b/src/openai/resources/responses/responses.py
index fe99aa851d..8de46dbab8 100644
--- a/src/openai/resources/responses/responses.py
+++ b/src/openai/resources/responses/responses.py
@@ -87,7 +87,9 @@ def create(
         parallel_tool_calls: Optional[bool] | NotGiven = NOT_GIVEN,
         previous_response_id: Optional[str] | NotGiven = NOT_GIVEN,
         prompt: Optional[ResponsePromptParam] | NotGiven = NOT_GIVEN,
+        prompt_cache_key: str | NotGiven = NOT_GIVEN,
         reasoning: Optional[Reasoning] | NotGiven = NOT_GIVEN,
+        safety_identifier: str | NotGiven = NOT_GIVEN,
         service_tier: Optional[Literal["auto", "default", "flex", "scale", "priority"]] | NotGiven = NOT_GIVEN,
         store: Optional[bool] | NotGiven = NOT_GIVEN,
         stream: Optional[Literal[False]] | NotGiven = NOT_GIVEN,
@@ -188,11 +190,21 @@ def create(
           prompt: Reference to a prompt template and its variables.
               [Learn more](https://platform.openai.com/docs/guides/text?api-mode=responses#reusable-prompts).
 
+          prompt_cache_key: Used by OpenAI to cache responses for similar requests to optimize your cache
+              hit rates. Replaces the `user` field.
+              [Learn more](https://platform.openai.com/docs/guides/prompt-caching).
+
           reasoning: **o-series models only**
 
               Configuration options for
               [reasoning models](https://platform.openai.com/docs/guides/reasoning).
 
+          safety_identifier: A stable identifier used to help detect users of your application that may be
+              violating OpenAI's usage policies. The IDs should be a string that uniquely
+              identifies each user. We recommend hashing their username or email address, in
+              order to avoid sending us any identifying information.
+              [Learn more](https://platform.openai.com/docs/guides/safety-best-practices#safety-identifiers).
+
           service_tier: Specifies the processing type used for serving the request.
 
               - If set to 'auto', then the request will be processed with the service tier
@@ -267,9 +279,11 @@ def create(
               - `disabled` (default): If a model response will exceed the context window size
                 for a model, the request will fail with a 400 error.
 
-          user: A stable identifier for your end-users. Used to boost cache hit rates by better
-              bucketing similar requests and to help OpenAI detect and prevent abuse.
-              [Learn more](https://platform.openai.com/docs/guides/safety-best-practices#end-user-ids).
+          user: This field is being replaced by `safety_identifier` and `prompt_cache_key`. Use
+              `prompt_cache_key` instead to maintain caching optimizations. A stable
+              identifier for your end-users. Used to boost cache hit rates by better bucketing
+              similar requests and to help OpenAI detect and prevent abuse.
+              [Learn more](https://platform.openai.com/docs/guides/safety-best-practices#safety-identifiers).
 
           extra_headers: Send extra headers
 
@@ -297,7 +311,9 @@ def create(
         parallel_tool_calls: Optional[bool] | NotGiven = NOT_GIVEN,
         previous_response_id: Optional[str] | NotGiven = NOT_GIVEN,
         prompt: Optional[ResponsePromptParam] | NotGiven = NOT_GIVEN,
+        prompt_cache_key: str | NotGiven = NOT_GIVEN,
         reasoning: Optional[Reasoning] | NotGiven = NOT_GIVEN,
+        safety_identifier: str | NotGiven = NOT_GIVEN,
         service_tier: Optional[Literal["auto", "default", "flex", "scale", "priority"]] | NotGiven = NOT_GIVEN,
         store: Optional[bool] | NotGiven = NOT_GIVEN,
         temperature: Optional[float] | NotGiven = NOT_GIVEN,
@@ -404,11 +420,21 @@ def create(
           prompt: Reference to a prompt template and its variables.
               [Learn more](https://platform.openai.com/docs/guides/text?api-mode=responses#reusable-prompts).
 
+          prompt_cache_key: Used by OpenAI to cache responses for similar requests to optimize your cache
+              hit rates. Replaces the `user` field.
+              [Learn more](https://platform.openai.com/docs/guides/prompt-caching).
+
           reasoning: **o-series models only**
 
               Configuration options for
               [reasoning models](https://platform.openai.com/docs/guides/reasoning).
 
+          safety_identifier: A stable identifier used to help detect users of your application that may be
+              violating OpenAI's usage policies. The IDs should be a string that uniquely
+              identifies each user. We recommend hashing their username or email address, in
+              order to avoid sending us any identifying information.
+              [Learn more](https://platform.openai.com/docs/guides/safety-best-practices#safety-identifiers).
+
           service_tier: Specifies the processing type used for serving the request.
 
               - If set to 'auto', then the request will be processed with the service tier
@@ -476,9 +502,11 @@ def create(
               - `disabled` (default): If a model response will exceed the context window size
                 for a model, the request will fail with a 400 error.
 
-          user: A stable identifier for your end-users. Used to boost cache hit rates by better
-              bucketing similar requests and to help OpenAI detect and prevent abuse.
-              [Learn more](https://platform.openai.com/docs/guides/safety-best-practices#end-user-ids).
+          user: This field is being replaced by `safety_identifier` and `prompt_cache_key`. Use
+              `prompt_cache_key` instead to maintain caching optimizations. A stable
+              identifier for your end-users. Used to boost cache hit rates by better bucketing
+              similar requests and to help OpenAI detect and prevent abuse.
+              [Learn more](https://platform.openai.com/docs/guides/safety-best-practices#safety-identifiers).
 
           extra_headers: Send extra headers
 
@@ -506,7 +534,9 @@ def create(
         parallel_tool_calls: Optional[bool] | NotGiven = NOT_GIVEN,
         previous_response_id: Optional[str] | NotGiven = NOT_GIVEN,
         prompt: Optional[ResponsePromptParam] | NotGiven = NOT_GIVEN,
+        prompt_cache_key: str | NotGiven = NOT_GIVEN,
         reasoning: Optional[Reasoning] | NotGiven = NOT_GIVEN,
+        safety_identifier: str | NotGiven = NOT_GIVEN,
         service_tier: Optional[Literal["auto", "default", "flex", "scale", "priority"]] | NotGiven = NOT_GIVEN,
         store: Optional[bool] | NotGiven = NOT_GIVEN,
         temperature: Optional[float] | NotGiven = NOT_GIVEN,
@@ -613,11 +643,21 @@ def create(
           prompt: Reference to a prompt template and its variables.
               [Learn more](https://platform.openai.com/docs/guides/text?api-mode=responses#reusable-prompts).
 
+          prompt_cache_key: Used by OpenAI to cache responses for similar requests to optimize your cache
+              hit rates. Replaces the `user` field.
+              [Learn more](https://platform.openai.com/docs/guides/prompt-caching).
+
           reasoning: **o-series models only**
 
               Configuration options for
               [reasoning models](https://platform.openai.com/docs/guides/reasoning).
 
+          safety_identifier: A stable identifier used to help detect users of your application that may be
+              violating OpenAI's usage policies. The IDs should be a string that uniquely
+              identifies each user. We recommend hashing their username or email address, in
+              order to avoid sending us any identifying information.
+              [Learn more](https://platform.openai.com/docs/guides/safety-best-practices#safety-identifiers).
+
           service_tier: Specifies the processing type used for serving the request.
 
               - If set to 'auto', then the request will be processed with the service tier
@@ -685,9 +725,11 @@ def create(
               - `disabled` (default): If a model response will exceed the context window size
                 for a model, the request will fail with a 400 error.
 
-          user: A stable identifier for your end-users. Used to boost cache hit rates by better
-              bucketing similar requests and to help OpenAI detect and prevent abuse.
-              [Learn more](https://platform.openai.com/docs/guides/safety-best-practices#end-user-ids).
+          user: This field is being replaced by `safety_identifier` and `prompt_cache_key`. Use
+              `prompt_cache_key` instead to maintain caching optimizations. A stable
+              identifier for your end-users. Used to boost cache hit rates by better bucketing
+              similar requests and to help OpenAI detect and prevent abuse.
+              [Learn more](https://platform.openai.com/docs/guides/safety-best-practices#safety-identifiers).
 
           extra_headers: Send extra headers
 
@@ -713,7 +755,9 @@ def create(
         parallel_tool_calls: Optional[bool] | NotGiven = NOT_GIVEN,
         previous_response_id: Optional[str] | NotGiven = NOT_GIVEN,
         prompt: Optional[ResponsePromptParam] | NotGiven = NOT_GIVEN,
+        prompt_cache_key: str | NotGiven = NOT_GIVEN,
         reasoning: Optional[Reasoning] | NotGiven = NOT_GIVEN,
+        safety_identifier: str | NotGiven = NOT_GIVEN,
         service_tier: Optional[Literal["auto", "default", "flex", "scale", "priority"]] | NotGiven = NOT_GIVEN,
         store: Optional[bool] | NotGiven = NOT_GIVEN,
         stream: Optional[Literal[False]] | Literal[True] | NotGiven = NOT_GIVEN,
@@ -747,7 +791,9 @@ def create(
                     "parallel_tool_calls": parallel_tool_calls,
                     "previous_response_id": previous_response_id,
                     "prompt": prompt,
+                    "prompt_cache_key": prompt_cache_key,
                     "reasoning": reasoning,
+                    "safety_identifier": safety_identifier,
                     "service_tier": service_tier,
                     "store": store,
                     "stream": stream,
@@ -1352,7 +1398,9 @@ async def create(
         parallel_tool_calls: Optional[bool] | NotGiven = NOT_GIVEN,
         previous_response_id: Optional[str] | NotGiven = NOT_GIVEN,
         prompt: Optional[ResponsePromptParam] | NotGiven = NOT_GIVEN,
+        prompt_cache_key: str | NotGiven = NOT_GIVEN,
         reasoning: Optional[Reasoning] | NotGiven = NOT_GIVEN,
+        safety_identifier: str | NotGiven = NOT_GIVEN,
         service_tier: Optional[Literal["auto", "default", "flex", "scale", "priority"]] | NotGiven = NOT_GIVEN,
         store: Optional[bool] | NotGiven = NOT_GIVEN,
         stream: Optional[Literal[False]] | NotGiven = NOT_GIVEN,
@@ -1453,11 +1501,21 @@ async def create(
           prompt: Reference to a prompt template and its variables.
               [Learn more](https://platform.openai.com/docs/guides/text?api-mode=responses#reusable-prompts).
 
+          prompt_cache_key: Used by OpenAI to cache responses for similar requests to optimize your cache
+              hit rates. Replaces the `user` field.
+              [Learn more](https://platform.openai.com/docs/guides/prompt-caching).
+
           reasoning: **o-series models only**
 
               Configuration options for
               [reasoning models](https://platform.openai.com/docs/guides/reasoning).
 
+          safety_identifier: A stable identifier used to help detect users of your application that may be
+              violating OpenAI's usage policies. The IDs should be a string that uniquely
+              identifies each user. We recommend hashing their username or email address, in
+              order to avoid sending us any identifying information.
+              [Learn more](https://platform.openai.com/docs/guides/safety-best-practices#safety-identifiers).
+
           service_tier: Specifies the processing type used for serving the request.
 
               - If set to 'auto', then the request will be processed with the service tier
@@ -1532,9 +1590,11 @@ async def create(
               - `disabled` (default): If a model response will exceed the context window size
                 for a model, the request will fail with a 400 error.
 
-          user: A stable identifier for your end-users. Used to boost cache hit rates by better
-              bucketing similar requests and to help OpenAI detect and prevent abuse.
-              [Learn more](https://platform.openai.com/docs/guides/safety-best-practices#end-user-ids).
+          user: This field is being replaced by `safety_identifier` and `prompt_cache_key`. Use
+              `prompt_cache_key` instead to maintain caching optimizations. A stable
+              identifier for your end-users. Used to boost cache hit rates by better bucketing
+              similar requests and to help OpenAI detect and prevent abuse.
+              [Learn more](https://platform.openai.com/docs/guides/safety-best-practices#safety-identifiers).
 
           extra_headers: Send extra headers
 
@@ -1562,7 +1622,9 @@ async def create(
         parallel_tool_calls: Optional[bool] | NotGiven = NOT_GIVEN,
         previous_response_id: Optional[str] | NotGiven = NOT_GIVEN,
         prompt: Optional[ResponsePromptParam] | NotGiven = NOT_GIVEN,
+        prompt_cache_key: str | NotGiven = NOT_GIVEN,
         reasoning: Optional[Reasoning] | NotGiven = NOT_GIVEN,
+        safety_identifier: str | NotGiven = NOT_GIVEN,
         service_tier: Optional[Literal["auto", "default", "flex", "scale", "priority"]] | NotGiven = NOT_GIVEN,
         store: Optional[bool] | NotGiven = NOT_GIVEN,
         temperature: Optional[float] | NotGiven = NOT_GIVEN,
@@ -1669,11 +1731,21 @@ async def create(
           prompt: Reference to a prompt template and its variables.
               [Learn more](https://platform.openai.com/docs/guides/text?api-mode=responses#reusable-prompts).
 
+          prompt_cache_key: Used by OpenAI to cache responses for similar requests to optimize your cache
+              hit rates. Replaces the `user` field.
+              [Learn more](https://platform.openai.com/docs/guides/prompt-caching).
+
           reasoning: **o-series models only**
 
               Configuration options for
               [reasoning models](https://platform.openai.com/docs/guides/reasoning).
 
+          safety_identifier: A stable identifier used to help detect users of your application that may be
+              violating OpenAI's usage policies. The IDs should be a string that uniquely
+              identifies each user. We recommend hashing their username or email address, in
+              order to avoid sending us any identifying information.
+              [Learn more](https://platform.openai.com/docs/guides/safety-best-practices#safety-identifiers).
+
           service_tier: Specifies the processing type used for serving the request.
 
               - If set to 'auto', then the request will be processed with the service tier
@@ -1741,9 +1813,11 @@ async def create(
               - `disabled` (default): If a model response will exceed the context window size
                 for a model, the request will fail with a 400 error.
 
-          user: A stable identifier for your end-users. Used to boost cache hit rates by better
-              bucketing similar requests and to help OpenAI detect and prevent abuse.
-              [Learn more](https://platform.openai.com/docs/guides/safety-best-practices#end-user-ids).
+          user: This field is being replaced by `safety_identifier` and `prompt_cache_key`. Use
+              `prompt_cache_key` instead to maintain caching optimizations. A stable
+              identifier for your end-users. Used to boost cache hit rates by better bucketing
+              similar requests and to help OpenAI detect and prevent abuse.
+              [Learn more](https://platform.openai.com/docs/guides/safety-best-practices#safety-identifiers).
 
           extra_headers: Send extra headers
 
@@ -1771,7 +1845,9 @@ async def create(
         parallel_tool_calls: Optional[bool] | NotGiven = NOT_GIVEN,
         previous_response_id: Optional[str] | NotGiven = NOT_GIVEN,
         prompt: Optional[ResponsePromptParam] | NotGiven = NOT_GIVEN,
+        prompt_cache_key: str | NotGiven = NOT_GIVEN,
         reasoning: Optional[Reasoning] | NotGiven = NOT_GIVEN,
+        safety_identifier: str | NotGiven = NOT_GIVEN,
         service_tier: Optional[Literal["auto", "default", "flex", "scale", "priority"]] | NotGiven = NOT_GIVEN,
         store: Optional[bool] | NotGiven = NOT_GIVEN,
         temperature: Optional[float] | NotGiven = NOT_GIVEN,
@@ -1878,11 +1954,21 @@ async def create(
           prompt: Reference to a prompt template and its variables.
               [Learn more](https://platform.openai.com/docs/guides/text?api-mode=responses#reusable-prompts).
 
+          prompt_cache_key: Used by OpenAI to cache responses for similar requests to optimize your cache
+              hit rates. Replaces the `user` field.
+              [Learn more](https://platform.openai.com/docs/guides/prompt-caching).
+
           reasoning: **o-series models only**
 
               Configuration options for
               [reasoning models](https://platform.openai.com/docs/guides/reasoning).
 
+          safety_identifier: A stable identifier used to help detect users of your application that may be
+              violating OpenAI's usage policies. The IDs should be a string that uniquely
+              identifies each user. We recommend hashing their username or email address, in
+              order to avoid sending us any identifying information.
+              [Learn more](https://platform.openai.com/docs/guides/safety-best-practices#safety-identifiers).
+
           service_tier: Specifies the processing type used for serving the request.
 
               - If set to 'auto', then the request will be processed with the service tier
@@ -1950,9 +2036,11 @@ async def create(
               - `disabled` (default): If a model response will exceed the context window size
                 for a model, the request will fail with a 400 error.
 
-          user: A stable identifier for your end-users. Used to boost cache hit rates by better
-              bucketing similar requests and to help OpenAI detect and prevent abuse.
-              [Learn more](https://platform.openai.com/docs/guides/safety-best-practices#end-user-ids).
+          user: This field is being replaced by `safety_identifier` and `prompt_cache_key`. Use
+              `prompt_cache_key` instead to maintain caching optimizations. A stable
+              identifier for your end-users. Used to boost cache hit rates by better bucketing
+              similar requests and to help OpenAI detect and prevent abuse.
+              [Learn more](https://platform.openai.com/docs/guides/safety-best-practices#safety-identifiers).
 
           extra_headers: Send extra headers
 
@@ -1978,7 +2066,9 @@ async def create(
         parallel_tool_calls: Optional[bool] | NotGiven = NOT_GIVEN,
         previous_response_id: Optional[str] | NotGiven = NOT_GIVEN,
         prompt: Optional[ResponsePromptParam] | NotGiven = NOT_GIVEN,
+        prompt_cache_key: str | NotGiven = NOT_GIVEN,
         reasoning: Optional[Reasoning] | NotGiven = NOT_GIVEN,
+        safety_identifier: str | NotGiven = NOT_GIVEN,
         service_tier: Optional[Literal["auto", "default", "flex", "scale", "priority"]] | NotGiven = NOT_GIVEN,
         store: Optional[bool] | NotGiven = NOT_GIVEN,
         stream: Optional[Literal[False]] | Literal[True] | NotGiven = NOT_GIVEN,
@@ -2012,7 +2102,9 @@ async def create(
                     "parallel_tool_calls": parallel_tool_calls,
                     "previous_response_id": previous_response_id,
                     "prompt": prompt,
+                    "prompt_cache_key": prompt_cache_key,
                     "reasoning": reasoning,
+                    "safety_identifier": safety_identifier,
                     "service_tier": service_tier,
                     "store": store,
                     "stream": stream,
diff --git a/src/openai/types/chat/__init__.py b/src/openai/types/chat/__init__.py
index 0945bcad11..dc26198567 100644
--- a/src/openai/types/chat/__init__.py
+++ b/src/openai/types/chat/__init__.py
@@ -28,7 +28,9 @@
 from .chat_completion_store_message import ChatCompletionStoreMessage as ChatCompletionStoreMessage
 from .chat_completion_token_logprob import ChatCompletionTokenLogprob as ChatCompletionTokenLogprob
 from .chat_completion_reasoning_effort import ChatCompletionReasoningEffort as ChatCompletionReasoningEffort
+from .chat_completion_content_part_text import ChatCompletionContentPartText as ChatCompletionContentPartText
 from .chat_completion_message_tool_call import ChatCompletionMessageToolCall as ChatCompletionMessageToolCall
+from .chat_completion_content_part_image import ChatCompletionContentPartImage as ChatCompletionContentPartImage
 from .chat_completion_content_part_param import ChatCompletionContentPartParam as ChatCompletionContentPartParam
 from .chat_completion_tool_message_param import ChatCompletionToolMessageParam as ChatCompletionToolMessageParam
 from .chat_completion_user_message_param import ChatCompletionUserMessageParam as ChatCompletionUserMessageParam
diff --git a/src/openai/types/chat/chat_completion_content_part_image.py b/src/openai/types/chat/chat_completion_content_part_image.py
new file mode 100644
index 0000000000..c1386b9dd3
--- /dev/null
+++ b/src/openai/types/chat/chat_completion_content_part_image.py
@@ -0,0 +1,27 @@
+# File generated from our OpenAPI spec by Stainless. See CONTRIBUTING.md for details.
+
+from typing import Optional
+from typing_extensions import Literal
+
+from ..._models import BaseModel
+
+__all__ = ["ChatCompletionContentPartImage", "ImageURL"]
+
+
+class ImageURL(BaseModel):
+    url: str
+    """Either a URL of the image or the base64 encoded image data."""
+
+    detail: Optional[Literal["auto", "low", "high"]] = None
+    """Specifies the detail level of the image.
+
+    Learn more in the
+    [Vision guide](https://platform.openai.com/docs/guides/vision#low-or-high-fidelity-image-understanding).
+    """
+
+
+class ChatCompletionContentPartImage(BaseModel):
+    image_url: ImageURL
+
+    type: Literal["image_url"]
+    """The type of the content part."""
diff --git a/src/openai/types/chat/chat_completion_content_part_text.py b/src/openai/types/chat/chat_completion_content_part_text.py
new file mode 100644
index 0000000000..f09f35f708
--- /dev/null
+++ b/src/openai/types/chat/chat_completion_content_part_text.py
@@ -0,0 +1,15 @@
+# File generated from our OpenAPI spec by Stainless. See CONTRIBUTING.md for details.
+
+from typing_extensions import Literal
+
+from ..._models import BaseModel
+
+__all__ = ["ChatCompletionContentPartText"]
+
+
+class ChatCompletionContentPartText(BaseModel):
+    text: str
+    """The text content."""
+
+    type: Literal["text"]
+    """The type of the content part."""
diff --git a/src/openai/types/chat/chat_completion_store_message.py b/src/openai/types/chat/chat_completion_store_message.py
index 8dc093f7b8..661342716b 100644
--- a/src/openai/types/chat/chat_completion_store_message.py
+++ b/src/openai/types/chat/chat_completion_store_message.py
@@ -1,10 +1,23 @@
 # File generated from our OpenAPI spec by Stainless. See CONTRIBUTING.md for details.
 
+from typing import List, Union, Optional
+from typing_extensions import TypeAlias
+
 from .chat_completion_message import ChatCompletionMessage
+from .chat_completion_content_part_text import ChatCompletionContentPartText
+from .chat_completion_content_part_image import ChatCompletionContentPartImage
+
+__all__ = ["ChatCompletionStoreMessage", "ChatCompletionStoreMessageContentPart"]
 
-__all__ = ["ChatCompletionStoreMessage"]
+ChatCompletionStoreMessageContentPart: TypeAlias = Union[ChatCompletionContentPartText, ChatCompletionContentPartImage]
 
 
 class ChatCompletionStoreMessage(ChatCompletionMessage):
     id: str
     """The identifier of the chat message."""
+
+    content_parts: Optional[List[ChatCompletionStoreMessageContentPart]] = None
+    """
+    If a content parts array was provided, this is an array of `text` and
+    `image_url` parts. Otherwise, null.
+    """
diff --git a/src/openai/types/chat/completion_create_params.py b/src/openai/types/chat/completion_create_params.py
index 191793c18f..20d7c187f8 100644
--- a/src/openai/types/chat/completion_create_params.py
+++ b/src/openai/types/chat/completion_create_params.py
@@ -177,6 +177,13 @@ class CompletionCreateParamsBase(TypedDict, total=False):
     far, increasing the model's likelihood to talk about new topics.
     """
 
+    prompt_cache_key: str
+    """
+    Used by OpenAI to cache responses for similar requests to optimize your cache
+    hit rates. Replaces the `user` field.
+    [Learn more](https://platform.openai.com/docs/guides/prompt-caching).
+    """
+
     reasoning_effort: Optional[ReasoningEffort]
     """**o-series models only**
 
@@ -199,6 +206,15 @@ class CompletionCreateParamsBase(TypedDict, total=False):
     preferred for models that support it.
     """
 
+    safety_identifier: str
+    """
+    A stable identifier used to help detect users of your application that may be
+    violating OpenAI's usage policies. The IDs should be a string that uniquely
+    identifies each user. We recommend hashing their username or email address, in
+    order to avoid sending us any identifying information.
+    [Learn more](https://platform.openai.com/docs/guides/safety-best-practices#safety-identifiers).
+    """
+
     seed: Optional[int]
     """
     This feature is in Beta. If specified, our system will make a best effort to
@@ -293,11 +309,12 @@ class CompletionCreateParamsBase(TypedDict, total=False):
     """
 
     user: str
-    """A stable identifier for your end-users.
+    """This field is being replaced by `safety_identifier` and `prompt_cache_key`.
 
-    Used to boost cache hit rates by better bucketing similar requests and to help
-    OpenAI detect and prevent abuse.
-    [Learn more](https://platform.openai.com/docs/guides/safety-best-practices#end-user-ids).
+    Use `prompt_cache_key` instead to maintain caching optimizations. A stable
+    identifier for your end-users. Used to boost cache hit rates by better bucketing
+    similar requests and to help OpenAI detect and prevent abuse.
+    [Learn more](https://platform.openai.com/docs/guides/safety-best-practices#safety-identifiers).
     """
 
     web_search_options: WebSearchOptions
diff --git a/src/openai/types/responses/response.py b/src/openai/types/responses/response.py
index 2af85d03fb..7db466dfe7 100644
--- a/src/openai/types/responses/response.py
+++ b/src/openai/types/responses/response.py
@@ -163,6 +163,13 @@ class Response(BaseModel):
     [Learn more](https://platform.openai.com/docs/guides/text?api-mode=responses#reusable-prompts).
     """
 
+    prompt_cache_key: Optional[str] = None
+    """
+    Used by OpenAI to cache responses for similar requests to optimize your cache
+    hit rates. Replaces the `user` field.
+    [Learn more](https://platform.openai.com/docs/guides/prompt-caching).
+    """
+
     reasoning: Optional[Reasoning] = None
     """**o-series models only**
 
@@ -170,6 +177,15 @@ class Response(BaseModel):
     [reasoning models](https://platform.openai.com/docs/guides/reasoning).
     """
 
+    safety_identifier: Optional[str] = None
+    """
+    A stable identifier used to help detect users of your application that may be
+    violating OpenAI's usage policies. The IDs should be a string that uniquely
+    identifies each user. We recommend hashing their username or email address, in
+    order to avoid sending us any identifying information.
+    [Learn more](https://platform.openai.com/docs/guides/safety-best-practices#safety-identifiers).
+    """
+
     service_tier: Optional[Literal["auto", "default", "flex", "scale", "priority"]] = None
     """Specifies the processing type used for serving the request.
 
@@ -229,11 +245,12 @@ class Response(BaseModel):
     """
 
     user: Optional[str] = None
-    """A stable identifier for your end-users.
+    """This field is being replaced by `safety_identifier` and `prompt_cache_key`.
 
-    Used to boost cache hit rates by better bucketing similar requests and to help
-    OpenAI detect and prevent abuse.
-    [Learn more](https://platform.openai.com/docs/guides/safety-best-practices#end-user-ids).
+    Use `prompt_cache_key` instead to maintain caching optimizations. A stable
+    identifier for your end-users. Used to boost cache hit rates by better bucketing
+    similar requests and to help OpenAI detect and prevent abuse.
+    [Learn more](https://platform.openai.com/docs/guides/safety-best-practices#safety-identifiers).
     """
 
     @property
diff --git a/src/openai/types/responses/response_create_params.py b/src/openai/types/responses/response_create_params.py
index 08feefd081..4a78d7c028 100644
--- a/src/openai/types/responses/response_create_params.py
+++ b/src/openai/types/responses/response_create_params.py
@@ -123,6 +123,13 @@ class ResponseCreateParamsBase(TypedDict, total=False):
     [Learn more](https://platform.openai.com/docs/guides/text?api-mode=responses#reusable-prompts).
     """
 
+    prompt_cache_key: str
+    """
+    Used by OpenAI to cache responses for similar requests to optimize your cache
+    hit rates. Replaces the `user` field.
+    [Learn more](https://platform.openai.com/docs/guides/prompt-caching).
+    """
+
     reasoning: Optional[Reasoning]
     """**o-series models only**
 
@@ -130,6 +137,15 @@ class ResponseCreateParamsBase(TypedDict, total=False):
     [reasoning models](https://platform.openai.com/docs/guides/reasoning).
     """
 
+    safety_identifier: str
+    """
+    A stable identifier used to help detect users of your application that may be
+    violating OpenAI's usage policies. The IDs should be a string that uniquely
+    identifies each user. We recommend hashing their username or email address, in
+    order to avoid sending us any identifying information.
+    [Learn more](https://platform.openai.com/docs/guides/safety-best-practices#safety-identifiers).
+    """
+
     service_tier: Optional[Literal["auto", "default", "flex", "scale", "priority"]]
     """Specifies the processing type used for serving the request.
 
@@ -221,11 +237,12 @@ class ResponseCreateParamsBase(TypedDict, total=False):
     """
 
     user: str
-    """A stable identifier for your end-users.
+    """This field is being replaced by `safety_identifier` and `prompt_cache_key`.
 
-    Used to boost cache hit rates by better bucketing similar requests and to help
-    OpenAI detect and prevent abuse.
-    [Learn more](https://platform.openai.com/docs/guides/safety-best-practices#end-user-ids).
+    Use `prompt_cache_key` instead to maintain caching optimizations. A stable
+    identifier for your end-users. Used to boost cache hit rates by better bucketing
+    similar requests and to help OpenAI detect and prevent abuse.
+    [Learn more](https://platform.openai.com/docs/guides/safety-best-practices#safety-identifiers).
     """
 
 
diff --git a/tests/api_resources/chat/test_completions.py b/tests/api_resources/chat/test_completions.py
index aa8f58f0e5..2758d980ed 100644
--- a/tests/api_resources/chat/test_completions.py
+++ b/tests/api_resources/chat/test_completions.py
@@ -72,8 +72,10 @@ def test_method_create_with_all_params_overload_1(self, client: OpenAI) -> None:
                 "type": "content",
             },
             presence_penalty=-2,
+            prompt_cache_key="prompt-cache-key-1234",
             reasoning_effort="low",
             response_format={"type": "text"},
+            safety_identifier="safety-identifier-1234",
             seed=-9007199254740991,
             service_tier="auto",
             stop="\n",
@@ -199,8 +201,10 @@ def test_method_create_with_all_params_overload_2(self, client: OpenAI) -> None:
                 "type": "content",
             },
             presence_penalty=-2,
+            prompt_cache_key="prompt-cache-key-1234",
             reasoning_effort="low",
             response_format={"type": "text"},
+            safety_identifier="safety-identifier-1234",
             seed=-9007199254740991,
             service_tier="auto",
             stop="\n",
@@ -501,8 +505,10 @@ async def test_method_create_with_all_params_overload_1(self, async_client: Asyn
                 "type": "content",
             },
             presence_penalty=-2,
+            prompt_cache_key="prompt-cache-key-1234",
             reasoning_effort="low",
             response_format={"type": "text"},
+            safety_identifier="safety-identifier-1234",
             seed=-9007199254740991,
             service_tier="auto",
             stop="\n",
@@ -628,8 +634,10 @@ async def test_method_create_with_all_params_overload_2(self, async_client: Asyn
                 "type": "content",
             },
             presence_penalty=-2,
+            prompt_cache_key="prompt-cache-key-1234",
             reasoning_effort="low",
             response_format={"type": "text"},
+            safety_identifier="safety-identifier-1234",
             seed=-9007199254740991,
             service_tier="auto",
             stop="\n",
diff --git a/tests/api_resources/test_responses.py b/tests/api_resources/test_responses.py
index 158654ee70..63e47d8a69 100644
--- a/tests/api_resources/test_responses.py
+++ b/tests/api_resources/test_responses.py
@@ -43,11 +43,13 @@ def test_method_create_with_all_params_overload_1(self, client: OpenAI) -> None:
                 "variables": {"foo": "string"},
                 "version": "version",
             },
+            prompt_cache_key="prompt-cache-key-1234",
             reasoning={
                 "effort": "low",
                 "generate_summary": "auto",
                 "summary": "auto",
             },
+            safety_identifier="safety-identifier-1234",
             service_tier="auto",
             store=True,
             stream=False,
@@ -116,11 +118,13 @@ def test_method_create_with_all_params_overload_2(self, client: OpenAI) -> None:
                 "variables": {"foo": "string"},
                 "version": "version",
             },
+            prompt_cache_key="prompt-cache-key-1234",
             reasoning={
                 "effort": "low",
                 "generate_summary": "auto",
                 "summary": "auto",
             },
+            safety_identifier="safety-identifier-1234",
             service_tier="auto",
             store=True,
             temperature=1,
@@ -380,11 +384,13 @@ async def test_method_create_with_all_params_overload_1(self, async_client: Asyn
                 "variables": {"foo": "string"},
                 "version": "version",
             },
+            prompt_cache_key="prompt-cache-key-1234",
             reasoning={
                 "effort": "low",
                 "generate_summary": "auto",
                 "summary": "auto",
             },
+            safety_identifier="safety-identifier-1234",
             service_tier="auto",
             store=True,
             stream=False,
@@ -453,11 +459,13 @@ async def test_method_create_with_all_params_overload_2(self, async_client: Asyn
                 "variables": {"foo": "string"},
                 "version": "version",
             },
+            prompt_cache_key="prompt-cache-key-1234",
             reasoning={
                 "effort": "low",
                 "generate_summary": "auto",
                 "summary": "auto",
             },
+            safety_identifier="safety-identifier-1234",
             service_tier="auto",
             store=True,
             temperature=1,