diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index e0b8841fba..407051a9fb 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "1.89.0"
+  ".": "1.90.0"
 }
\ No newline at end of file
diff --git a/.stats.yml b/.stats.yml
index 7e42b77a27..f8abf5bab6 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-9e41d2d5471d2c28bff0d616f4476f5b0e6c541ef4cb51bdaaef5fdf5e13c8b2.yml
-openapi_spec_hash: 86f765e18d00e32cf2ce9db7ab84d946
+openapi_spec_url: https://storage.googleapis.com/stainless-sdk-openapi-specs/openai%2Fopenai-f411a68f272b8be0ab0c266043da33228687b9b2d76896724e3cef797de9563d.yml
+openapi_spec_hash: 89bf866ea95ecfb3d76c8833237047d6
 config_hash: dc5515e257676a27cb1ace1784aa92b3
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6557ddeab6..dc45fa7bb5 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,13 @@
 # Changelog
 
+## 1.90.0 (2025-06-20)
+
+Full Changelog: [v1.89.0...v1.90.0](https://github.com/openai/openai-python/compare/v1.89.0...v1.90.0)
+
+### Features
+
+* **api:** make model and inputs not required to create response ([11bd62e](https://github.com/openai/openai-python/commit/11bd62eb7e46eec748edaf2e0cecf253ffc1202c))
+
 ## 1.89.0 (2025-06-20)
 
 Full Changelog: [v1.88.0...v1.89.0](https://github.com/openai/openai-python/compare/v1.88.0...v1.89.0)
diff --git a/pyproject.toml b/pyproject.toml
index 90716f994f..f66dacbf6d 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "openai"
-version = "1.89.0"
+version = "1.90.0"
 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 46a41a551e..7e515c74bd 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__ = "1.89.0"  # x-release-please-version
+__version__ = "1.90.0"  # x-release-please-version
diff --git a/src/openai/resources/responses/responses.py b/src/openai/resources/responses/responses.py
index 3276501494..841d198a5b 100644
--- a/src/openai/resources/responses/responses.py
+++ b/src/openai/resources/responses/responses.py
@@ -10,7 +10,7 @@
 
 from ... import _legacy_response
 from ..._types import NOT_GIVEN, Body, Query, Headers, NoneType, NotGiven
-from ..._utils import is_given, required_args, maybe_transform, async_maybe_transform
+from ..._utils import is_given, maybe_transform, async_maybe_transform
 from ..._compat import cached_property
 from ..._resource import SyncAPIResource, AsyncAPIResource
 from ..._response import to_streamed_response_wrapper, async_to_streamed_response_wrapper
@@ -76,13 +76,13 @@ def with_streaming_response(self) -> ResponsesWithStreamingResponse:
     def create(
         self,
         *,
-        input: Union[str, ResponseInputParam],
-        model: ResponsesModel,
         background: Optional[bool] | NotGiven = NOT_GIVEN,
         include: Optional[List[ResponseIncludable]] | NotGiven = NOT_GIVEN,
+        input: Union[str, ResponseInputParam] | NotGiven = NOT_GIVEN,
         instructions: Optional[str] | NotGiven = NOT_GIVEN,
         max_output_tokens: Optional[int] | NotGiven = NOT_GIVEN,
         metadata: Optional[Metadata] | NotGiven = NOT_GIVEN,
+        model: ResponsesModel | NotGiven = NOT_GIVEN,
         parallel_tool_calls: Optional[bool] | NotGiven = NOT_GIVEN,
         previous_response_id: Optional[str] | NotGiven = NOT_GIVEN,
         prompt: Optional[ResponsePromptParam] | NotGiven = NOT_GIVEN,
@@ -119,22 +119,6 @@ def create(
         your own data as input for the model's response.
 
         Args:
-          input: Text, image, or file inputs to the model, used to generate a response.
-
-              Learn more:
-
-              - [Text inputs and outputs](https://platform.openai.com/docs/guides/text)
-              - [Image inputs](https://platform.openai.com/docs/guides/images)
-              - [File inputs](https://platform.openai.com/docs/guides/pdf-files)
-              - [Conversation state](https://platform.openai.com/docs/guides/conversation-state)
-              - [Function calling](https://platform.openai.com/docs/guides/function-calling)
-
-          model: Model ID used to generate the response, like `gpt-4o` or `o3`. OpenAI offers a
-              wide range of models with different capabilities, performance characteristics,
-              and price points. Refer to the
-              [model guide](https://platform.openai.com/docs/models) to browse and compare
-              available models.
-
           background: Whether to run the model response in the background.
               [Learn more](https://platform.openai.com/docs/guides/background).
 
@@ -154,6 +138,16 @@ def create(
               - `code_interpreter_call.outputs`: Includes the outputs of python code execution
                 in code interpreter tool call items.
 
+          input: Text, image, or file inputs to the model, used to generate a response.
+
+              Learn more:
+
+              - [Text inputs and outputs](https://platform.openai.com/docs/guides/text)
+              - [Image inputs](https://platform.openai.com/docs/guides/images)
+              - [File inputs](https://platform.openai.com/docs/guides/pdf-files)
+              - [Conversation state](https://platform.openai.com/docs/guides/conversation-state)
+              - [Function calling](https://platform.openai.com/docs/guides/function-calling)
+
           instructions: A system (or developer) message inserted into the model's context.
 
               When using along with `previous_response_id`, the instructions from a previous
@@ -171,6 +165,12 @@ def create(
               Keys are strings with a maximum length of 64 characters. Values are strings with
               a maximum length of 512 characters.
 
+          model: Model ID used to generate the response, like `gpt-4o` or `o3`. OpenAI offers a
+              wide range of models with different capabilities, performance characteristics,
+              and price points. Refer to the
+              [model guide](https://platform.openai.com/docs/models) to browse and compare
+              available models.
+
           parallel_tool_calls: Whether to allow the model to run tool calls in parallel.
 
           previous_response_id: The unique ID of the previous response to the model. Use this to create
@@ -274,14 +274,14 @@ def create(
     def create(
         self,
         *,
-        input: Union[str, ResponseInputParam],
-        model: ResponsesModel,
         stream: Literal[True],
         background: Optional[bool] | NotGiven = NOT_GIVEN,
         include: Optional[List[ResponseIncludable]] | NotGiven = NOT_GIVEN,
+        input: Union[str, ResponseInputParam] | NotGiven = NOT_GIVEN,
         instructions: Optional[str] | NotGiven = NOT_GIVEN,
         max_output_tokens: Optional[int] | NotGiven = NOT_GIVEN,
         metadata: Optional[Metadata] | NotGiven = NOT_GIVEN,
+        model: ResponsesModel | NotGiven = NOT_GIVEN,
         parallel_tool_calls: Optional[bool] | NotGiven = NOT_GIVEN,
         previous_response_id: Optional[str] | NotGiven = NOT_GIVEN,
         prompt: Optional[ResponsePromptParam] | NotGiven = NOT_GIVEN,
@@ -317,22 +317,6 @@ def create(
         your own data as input for the model's response.
 
         Args:
-          input: Text, image, or file inputs to the model, used to generate a response.
-
-              Learn more:
-
-              - [Text inputs and outputs](https://platform.openai.com/docs/guides/text)
-              - [Image inputs](https://platform.openai.com/docs/guides/images)
-              - [File inputs](https://platform.openai.com/docs/guides/pdf-files)
-              - [Conversation state](https://platform.openai.com/docs/guides/conversation-state)
-              - [Function calling](https://platform.openai.com/docs/guides/function-calling)
-
-          model: Model ID used to generate the response, like `gpt-4o` or `o3`. OpenAI offers a
-              wide range of models with different capabilities, performance characteristics,
-              and price points. Refer to the
-              [model guide](https://platform.openai.com/docs/models) to browse and compare
-              available models.
-
           stream: If set to true, the model response data will be streamed to the client as it is
               generated using
               [server-sent events](https://developer.mozilla.org/en-US/docs/Web/API/Server-sent_events/Using_server-sent_events#Event_stream_format).
@@ -359,6 +343,16 @@ def create(
               - `code_interpreter_call.outputs`: Includes the outputs of python code execution
                 in code interpreter tool call items.
 
+          input: Text, image, or file inputs to the model, used to generate a response.
+
+              Learn more:
+
+              - [Text inputs and outputs](https://platform.openai.com/docs/guides/text)
+              - [Image inputs](https://platform.openai.com/docs/guides/images)
+              - [File inputs](https://platform.openai.com/docs/guides/pdf-files)
+              - [Conversation state](https://platform.openai.com/docs/guides/conversation-state)
+              - [Function calling](https://platform.openai.com/docs/guides/function-calling)
+
           instructions: A system (or developer) message inserted into the model's context.
 
               When using along with `previous_response_id`, the instructions from a previous
@@ -376,6 +370,12 @@ def create(
               Keys are strings with a maximum length of 64 characters. Values are strings with
               a maximum length of 512 characters.
 
+          model: Model ID used to generate the response, like `gpt-4o` or `o3`. OpenAI offers a
+              wide range of models with different capabilities, performance characteristics,
+              and price points. Refer to the
+              [model guide](https://platform.openai.com/docs/models) to browse and compare
+              available models.
+
           parallel_tool_calls: Whether to allow the model to run tool calls in parallel.
 
           previous_response_id: The unique ID of the previous response to the model. Use this to create
@@ -472,14 +472,14 @@ def create(
     def create(
         self,
         *,
-        input: Union[str, ResponseInputParam],
-        model: ResponsesModel,
         stream: bool,
         background: Optional[bool] | NotGiven = NOT_GIVEN,
         include: Optional[List[ResponseIncludable]] | NotGiven = NOT_GIVEN,
+        input: Union[str, ResponseInputParam] | NotGiven = NOT_GIVEN,
         instructions: Optional[str] | NotGiven = NOT_GIVEN,
         max_output_tokens: Optional[int] | NotGiven = NOT_GIVEN,
         metadata: Optional[Metadata] | NotGiven = NOT_GIVEN,
+        model: ResponsesModel | NotGiven = NOT_GIVEN,
         parallel_tool_calls: Optional[bool] | NotGiven = NOT_GIVEN,
         previous_response_id: Optional[str] | NotGiven = NOT_GIVEN,
         prompt: Optional[ResponsePromptParam] | NotGiven = NOT_GIVEN,
@@ -515,22 +515,6 @@ def create(
         your own data as input for the model's response.
 
         Args:
-          input: Text, image, or file inputs to the model, used to generate a response.
-
-              Learn more:
-
-              - [Text inputs and outputs](https://platform.openai.com/docs/guides/text)
-              - [Image inputs](https://platform.openai.com/docs/guides/images)
-              - [File inputs](https://platform.openai.com/docs/guides/pdf-files)
-              - [Conversation state](https://platform.openai.com/docs/guides/conversation-state)
-              - [Function calling](https://platform.openai.com/docs/guides/function-calling)
-
-          model: Model ID used to generate the response, like `gpt-4o` or `o3`. OpenAI offers a
-              wide range of models with different capabilities, performance characteristics,
-              and price points. Refer to the
-              [model guide](https://platform.openai.com/docs/models) to browse and compare
-              available models.
-
           stream: If set to true, the model response data will be streamed to the client as it is
               generated using
               [server-sent events](https://developer.mozilla.org/en-US/docs/Web/API/Server-sent_events/Using_server-sent_events#Event_stream_format).
@@ -557,6 +541,16 @@ def create(
               - `code_interpreter_call.outputs`: Includes the outputs of python code execution
                 in code interpreter tool call items.
 
+          input: Text, image, or file inputs to the model, used to generate a response.
+
+              Learn more:
+
+              - [Text inputs and outputs](https://platform.openai.com/docs/guides/text)
+              - [Image inputs](https://platform.openai.com/docs/guides/images)
+              - [File inputs](https://platform.openai.com/docs/guides/pdf-files)
+              - [Conversation state](https://platform.openai.com/docs/guides/conversation-state)
+              - [Function calling](https://platform.openai.com/docs/guides/function-calling)
+
           instructions: A system (or developer) message inserted into the model's context.
 
               When using along with `previous_response_id`, the instructions from a previous
@@ -574,6 +568,12 @@ def create(
               Keys are strings with a maximum length of 64 characters. Values are strings with
               a maximum length of 512 characters.
 
+          model: Model ID used to generate the response, like `gpt-4o` or `o3`. OpenAI offers a
+              wide range of models with different capabilities, performance characteristics,
+              and price points. Refer to the
+              [model guide](https://platform.openai.com/docs/models) to browse and compare
+              available models.
+
           parallel_tool_calls: Whether to allow the model to run tool calls in parallel.
 
           previous_response_id: The unique ID of the previous response to the model. Use this to create
@@ -666,17 +666,16 @@ def create(
         """
         ...
 
-    @required_args(["input", "model"], ["input", "model", "stream"])
     def create(
         self,
         *,
-        input: Union[str, ResponseInputParam],
-        model: ResponsesModel,
         background: Optional[bool] | NotGiven = NOT_GIVEN,
         include: Optional[List[ResponseIncludable]] | NotGiven = NOT_GIVEN,
+        input: Union[str, ResponseInputParam] | NotGiven = NOT_GIVEN,
         instructions: Optional[str] | NotGiven = NOT_GIVEN,
         max_output_tokens: Optional[int] | NotGiven = NOT_GIVEN,
         metadata: Optional[Metadata] | NotGiven = NOT_GIVEN,
+        model: ResponsesModel | NotGiven = NOT_GIVEN,
         parallel_tool_calls: Optional[bool] | NotGiven = NOT_GIVEN,
         previous_response_id: Optional[str] | NotGiven = NOT_GIVEN,
         prompt: Optional[ResponsePromptParam] | NotGiven = NOT_GIVEN,
@@ -702,13 +701,13 @@ def create(
             "/responses",
             body=maybe_transform(
                 {
-                    "input": input,
-                    "model": model,
                     "background": background,
                     "include": include,
+                    "input": input,
                     "instructions": instructions,
                     "max_output_tokens": max_output_tokens,
                     "metadata": metadata,
+                    "model": model,
                     "parallel_tool_calls": parallel_tool_calls,
                     "previous_response_id": previous_response_id,
                     "prompt": prompt,
@@ -1295,13 +1294,13 @@ def with_streaming_response(self) -> AsyncResponsesWithStreamingResponse:
     async def create(
         self,
         *,
-        input: Union[str, ResponseInputParam],
-        model: ResponsesModel,
         background: Optional[bool] | NotGiven = NOT_GIVEN,
         include: Optional[List[ResponseIncludable]] | NotGiven = NOT_GIVEN,
+        input: Union[str, ResponseInputParam] | NotGiven = NOT_GIVEN,
         instructions: Optional[str] | NotGiven = NOT_GIVEN,
         max_output_tokens: Optional[int] | NotGiven = NOT_GIVEN,
         metadata: Optional[Metadata] | NotGiven = NOT_GIVEN,
+        model: ResponsesModel | NotGiven = NOT_GIVEN,
         parallel_tool_calls: Optional[bool] | NotGiven = NOT_GIVEN,
         previous_response_id: Optional[str] | NotGiven = NOT_GIVEN,
         prompt: Optional[ResponsePromptParam] | NotGiven = NOT_GIVEN,
@@ -1338,22 +1337,6 @@ async def create(
         your own data as input for the model's response.
 
         Args:
-          input: Text, image, or file inputs to the model, used to generate a response.
-
-              Learn more:
-
-              - [Text inputs and outputs](https://platform.openai.com/docs/guides/text)
-              - [Image inputs](https://platform.openai.com/docs/guides/images)
-              - [File inputs](https://platform.openai.com/docs/guides/pdf-files)
-              - [Conversation state](https://platform.openai.com/docs/guides/conversation-state)
-              - [Function calling](https://platform.openai.com/docs/guides/function-calling)
-
-          model: Model ID used to generate the response, like `gpt-4o` or `o3`. OpenAI offers a
-              wide range of models with different capabilities, performance characteristics,
-              and price points. Refer to the
-              [model guide](https://platform.openai.com/docs/models) to browse and compare
-              available models.
-
           background: Whether to run the model response in the background.
               [Learn more](https://platform.openai.com/docs/guides/background).
 
@@ -1373,6 +1356,16 @@ async def create(
               - `code_interpreter_call.outputs`: Includes the outputs of python code execution
                 in code interpreter tool call items.
 
+          input: Text, image, or file inputs to the model, used to generate a response.
+
+              Learn more:
+
+              - [Text inputs and outputs](https://platform.openai.com/docs/guides/text)
+              - [Image inputs](https://platform.openai.com/docs/guides/images)
+              - [File inputs](https://platform.openai.com/docs/guides/pdf-files)
+              - [Conversation state](https://platform.openai.com/docs/guides/conversation-state)
+              - [Function calling](https://platform.openai.com/docs/guides/function-calling)
+
           instructions: A system (or developer) message inserted into the model's context.
 
               When using along with `previous_response_id`, the instructions from a previous
@@ -1390,6 +1383,12 @@ async def create(
               Keys are strings with a maximum length of 64 characters. Values are strings with
               a maximum length of 512 characters.
 
+          model: Model ID used to generate the response, like `gpt-4o` or `o3`. OpenAI offers a
+              wide range of models with different capabilities, performance characteristics,
+              and price points. Refer to the
+              [model guide](https://platform.openai.com/docs/models) to browse and compare
+              available models.
+
           parallel_tool_calls: Whether to allow the model to run tool calls in parallel.
 
           previous_response_id: The unique ID of the previous response to the model. Use this to create
@@ -1493,14 +1492,14 @@ async def create(
     async def create(
         self,
         *,
-        input: Union[str, ResponseInputParam],
-        model: ResponsesModel,
         stream: Literal[True],
         background: Optional[bool] | NotGiven = NOT_GIVEN,
         include: Optional[List[ResponseIncludable]] | NotGiven = NOT_GIVEN,
+        input: Union[str, ResponseInputParam] | NotGiven = NOT_GIVEN,
         instructions: Optional[str] | NotGiven = NOT_GIVEN,
         max_output_tokens: Optional[int] | NotGiven = NOT_GIVEN,
         metadata: Optional[Metadata] | NotGiven = NOT_GIVEN,
+        model: ResponsesModel | NotGiven = NOT_GIVEN,
         parallel_tool_calls: Optional[bool] | NotGiven = NOT_GIVEN,
         previous_response_id: Optional[str] | NotGiven = NOT_GIVEN,
         prompt: Optional[ResponsePromptParam] | NotGiven = NOT_GIVEN,
@@ -1536,22 +1535,6 @@ async def create(
         your own data as input for the model's response.
 
         Args:
-          input: Text, image, or file inputs to the model, used to generate a response.
-
-              Learn more:
-
-              - [Text inputs and outputs](https://platform.openai.com/docs/guides/text)
-              - [Image inputs](https://platform.openai.com/docs/guides/images)
-              - [File inputs](https://platform.openai.com/docs/guides/pdf-files)
-              - [Conversation state](https://platform.openai.com/docs/guides/conversation-state)
-              - [Function calling](https://platform.openai.com/docs/guides/function-calling)
-
-          model: Model ID used to generate the response, like `gpt-4o` or `o3`. OpenAI offers a
-              wide range of models with different capabilities, performance characteristics,
-              and price points. Refer to the
-              [model guide](https://platform.openai.com/docs/models) to browse and compare
-              available models.
-
           stream: If set to true, the model response data will be streamed to the client as it is
               generated using
               [server-sent events](https://developer.mozilla.org/en-US/docs/Web/API/Server-sent_events/Using_server-sent_events#Event_stream_format).
@@ -1578,6 +1561,16 @@ async def create(
               - `code_interpreter_call.outputs`: Includes the outputs of python code execution
                 in code interpreter tool call items.
 
+          input: Text, image, or file inputs to the model, used to generate a response.
+
+              Learn more:
+
+              - [Text inputs and outputs](https://platform.openai.com/docs/guides/text)
+              - [Image inputs](https://platform.openai.com/docs/guides/images)
+              - [File inputs](https://platform.openai.com/docs/guides/pdf-files)
+              - [Conversation state](https://platform.openai.com/docs/guides/conversation-state)
+              - [Function calling](https://platform.openai.com/docs/guides/function-calling)
+
           instructions: A system (or developer) message inserted into the model's context.
 
               When using along with `previous_response_id`, the instructions from a previous
@@ -1595,6 +1588,12 @@ async def create(
               Keys are strings with a maximum length of 64 characters. Values are strings with
               a maximum length of 512 characters.
 
+          model: Model ID used to generate the response, like `gpt-4o` or `o3`. OpenAI offers a
+              wide range of models with different capabilities, performance characteristics,
+              and price points. Refer to the
+              [model guide](https://platform.openai.com/docs/models) to browse and compare
+              available models.
+
           parallel_tool_calls: Whether to allow the model to run tool calls in parallel.
 
           previous_response_id: The unique ID of the previous response to the model. Use this to create
@@ -1691,14 +1690,14 @@ async def create(
     async def create(
         self,
         *,
-        input: Union[str, ResponseInputParam],
-        model: ResponsesModel,
         stream: bool,
         background: Optional[bool] | NotGiven = NOT_GIVEN,
         include: Optional[List[ResponseIncludable]] | NotGiven = NOT_GIVEN,
+        input: Union[str, ResponseInputParam] | NotGiven = NOT_GIVEN,
         instructions: Optional[str] | NotGiven = NOT_GIVEN,
         max_output_tokens: Optional[int] | NotGiven = NOT_GIVEN,
         metadata: Optional[Metadata] | NotGiven = NOT_GIVEN,
+        model: ResponsesModel | NotGiven = NOT_GIVEN,
         parallel_tool_calls: Optional[bool] | NotGiven = NOT_GIVEN,
         previous_response_id: Optional[str] | NotGiven = NOT_GIVEN,
         prompt: Optional[ResponsePromptParam] | NotGiven = NOT_GIVEN,
@@ -1734,22 +1733,6 @@ async def create(
         your own data as input for the model's response.
 
         Args:
-          input: Text, image, or file inputs to the model, used to generate a response.
-
-              Learn more:
-
-              - [Text inputs and outputs](https://platform.openai.com/docs/guides/text)
-              - [Image inputs](https://platform.openai.com/docs/guides/images)
-              - [File inputs](https://platform.openai.com/docs/guides/pdf-files)
-              - [Conversation state](https://platform.openai.com/docs/guides/conversation-state)
-              - [Function calling](https://platform.openai.com/docs/guides/function-calling)
-
-          model: Model ID used to generate the response, like `gpt-4o` or `o3`. OpenAI offers a
-              wide range of models with different capabilities, performance characteristics,
-              and price points. Refer to the
-              [model guide](https://platform.openai.com/docs/models) to browse and compare
-              available models.
-
           stream: If set to true, the model response data will be streamed to the client as it is
               generated using
               [server-sent events](https://developer.mozilla.org/en-US/docs/Web/API/Server-sent_events/Using_server-sent_events#Event_stream_format).
@@ -1776,6 +1759,16 @@ async def create(
               - `code_interpreter_call.outputs`: Includes the outputs of python code execution
                 in code interpreter tool call items.
 
+          input: Text, image, or file inputs to the model, used to generate a response.
+
+              Learn more:
+
+              - [Text inputs and outputs](https://platform.openai.com/docs/guides/text)
+              - [Image inputs](https://platform.openai.com/docs/guides/images)
+              - [File inputs](https://platform.openai.com/docs/guides/pdf-files)
+              - [Conversation state](https://platform.openai.com/docs/guides/conversation-state)
+              - [Function calling](https://platform.openai.com/docs/guides/function-calling)
+
           instructions: A system (or developer) message inserted into the model's context.
 
               When using along with `previous_response_id`, the instructions from a previous
@@ -1793,6 +1786,12 @@ async def create(
               Keys are strings with a maximum length of 64 characters. Values are strings with
               a maximum length of 512 characters.
 
+          model: Model ID used to generate the response, like `gpt-4o` or `o3`. OpenAI offers a
+              wide range of models with different capabilities, performance characteristics,
+              and price points. Refer to the
+              [model guide](https://platform.openai.com/docs/models) to browse and compare
+              available models.
+
           parallel_tool_calls: Whether to allow the model to run tool calls in parallel.
 
           previous_response_id: The unique ID of the previous response to the model. Use this to create
@@ -1885,17 +1884,16 @@ async def create(
         """
         ...
 
-    @required_args(["input", "model"], ["input", "model", "stream"])
     async def create(
         self,
         *,
-        input: Union[str, ResponseInputParam],
-        model: ResponsesModel,
         background: Optional[bool] | NotGiven = NOT_GIVEN,
         include: Optional[List[ResponseIncludable]] | NotGiven = NOT_GIVEN,
+        input: Union[str, ResponseInputParam] | NotGiven = NOT_GIVEN,
         instructions: Optional[str] | NotGiven = NOT_GIVEN,
         max_output_tokens: Optional[int] | NotGiven = NOT_GIVEN,
         metadata: Optional[Metadata] | NotGiven = NOT_GIVEN,
+        model: ResponsesModel | NotGiven = NOT_GIVEN,
         parallel_tool_calls: Optional[bool] | NotGiven = NOT_GIVEN,
         previous_response_id: Optional[str] | NotGiven = NOT_GIVEN,
         prompt: Optional[ResponsePromptParam] | NotGiven = NOT_GIVEN,
@@ -1921,13 +1919,13 @@ async def create(
             "/responses",
             body=await async_maybe_transform(
                 {
-                    "input": input,
-                    "model": model,
                     "background": background,
                     "include": include,
+                    "input": input,
                     "instructions": instructions,
                     "max_output_tokens": max_output_tokens,
                     "metadata": metadata,
+                    "model": model,
                     "parallel_tool_calls": parallel_tool_calls,
                     "previous_response_id": previous_response_id,
                     "prompt": prompt,
diff --git a/src/openai/types/responses/response_create_params.py b/src/openai/types/responses/response_create_params.py
index 976ae9741d..22acd6f653 100644
--- a/src/openai/types/responses/response_create_params.py
+++ b/src/openai/types/responses/response_create_params.py
@@ -26,27 +26,6 @@
 
 
 class ResponseCreateParamsBase(TypedDict, total=False):
-    input: Required[Union[str, ResponseInputParam]]
-    """Text, image, or file inputs to the model, used to generate a response.
-
-    Learn more:
-
-    - [Text inputs and outputs](https://platform.openai.com/docs/guides/text)
-    - [Image inputs](https://platform.openai.com/docs/guides/images)
-    - [File inputs](https://platform.openai.com/docs/guides/pdf-files)
-    - [Conversation state](https://platform.openai.com/docs/guides/conversation-state)
-    - [Function calling](https://platform.openai.com/docs/guides/function-calling)
-    """
-
-    model: Required[ResponsesModel]
-    """Model ID used to generate the response, like `gpt-4o` or `o3`.
-
-    OpenAI offers a wide range of models with different capabilities, performance
-    characteristics, and price points. Refer to the
-    [model guide](https://platform.openai.com/docs/models) to browse and compare
-    available models.
-    """
-
     background: Optional[bool]
     """Whether to run the model response in the background.
 
@@ -72,6 +51,18 @@ class ResponseCreateParamsBase(TypedDict, total=False):
       in code interpreter tool call items.
     """
 
+    input: Union[str, ResponseInputParam]
+    """Text, image, or file inputs to the model, used to generate a response.
+
+    Learn more:
+
+    - [Text inputs and outputs](https://platform.openai.com/docs/guides/text)
+    - [Image inputs](https://platform.openai.com/docs/guides/images)
+    - [File inputs](https://platform.openai.com/docs/guides/pdf-files)
+    - [Conversation state](https://platform.openai.com/docs/guides/conversation-state)
+    - [Function calling](https://platform.openai.com/docs/guides/function-calling)
+    """
+
     instructions: Optional[str]
     """A system (or developer) message inserted into the model's context.
 
@@ -97,6 +88,15 @@ class ResponseCreateParamsBase(TypedDict, total=False):
     a maximum length of 512 characters.
     """
 
+    model: ResponsesModel
+    """Model ID used to generate the response, like `gpt-4o` or `o3`.
+
+    OpenAI offers a wide range of models with different capabilities, performance
+    characteristics, and price points. Refer to the
+    [model guide](https://platform.openai.com/docs/models) to browse and compare
+    available models.
+    """
+
     parallel_tool_calls: Optional[bool]
     """Whether to allow the model to run tool calls in parallel."""
 
diff --git a/tests/api_resources/test_responses.py b/tests/api_resources/test_responses.py
index 6aaf0ea17f..5b7559655a 100644
--- a/tests/api_resources/test_responses.py
+++ b/tests/api_resources/test_responses.py
@@ -21,22 +21,19 @@ class TestResponses:
 
     @parametrize
     def test_method_create_overload_1(self, client: OpenAI) -> None:
-        response = client.responses.create(
-            input="string",
-            model="gpt-4o",
-        )
+        response = client.responses.create()
         assert_matches_type(Response, response, path=["response"])
 
     @parametrize
     def test_method_create_with_all_params_overload_1(self, client: OpenAI) -> None:
         response = client.responses.create(
-            input="string",
-            model="gpt-4o",
             background=True,
             include=["file_search_call.results"],
+            input="string",
             instructions="instructions",
             max_output_tokens=0,
             metadata={"foo": "string"},
+            model="gpt-4o",
             parallel_tool_calls=True,
             previous_response_id="previous_response_id",
             prompt={
@@ -72,10 +69,7 @@ def test_method_create_with_all_params_overload_1(self, client: OpenAI) -> None:
 
     @parametrize
     def test_raw_response_create_overload_1(self, client: OpenAI) -> None:
-        http_response = client.responses.with_raw_response.create(
-            input="string",
-            model="gpt-4o",
-        )
+        http_response = client.responses.with_raw_response.create()
 
         assert http_response.is_closed is True
         assert http_response.http_request.headers.get("X-Stainless-Lang") == "python"
@@ -84,10 +78,7 @@ def test_raw_response_create_overload_1(self, client: OpenAI) -> None:
 
     @parametrize
     def test_streaming_response_create_overload_1(self, client: OpenAI) -> None:
-        with client.responses.with_streaming_response.create(
-            input="string",
-            model="gpt-4o",
-        ) as http_response:
+        with client.responses.with_streaming_response.create() as http_response:
             assert not http_response.is_closed
             assert http_response.http_request.headers.get("X-Stainless-Lang") == "python"
 
@@ -99,8 +90,6 @@ def test_streaming_response_create_overload_1(self, client: OpenAI) -> None:
     @parametrize
     def test_method_create_overload_2(self, client: OpenAI) -> None:
         response_stream = client.responses.create(
-            input="string",
-            model="gpt-4o",
             stream=True,
         )
         response_stream.response.close()
@@ -108,14 +97,14 @@ def test_method_create_overload_2(self, client: OpenAI) -> None:
     @parametrize
     def test_method_create_with_all_params_overload_2(self, client: OpenAI) -> None:
         response_stream = client.responses.create(
-            input="string",
-            model="gpt-4o",
             stream=True,
             background=True,
             include=["file_search_call.results"],
+            input="string",
             instructions="instructions",
             max_output_tokens=0,
             metadata={"foo": "string"},
+            model="gpt-4o",
             parallel_tool_calls=True,
             previous_response_id="previous_response_id",
             prompt={
@@ -151,8 +140,6 @@ def test_method_create_with_all_params_overload_2(self, client: OpenAI) -> None:
     @parametrize
     def test_raw_response_create_overload_2(self, client: OpenAI) -> None:
         response = client.responses.with_raw_response.create(
-            input="string",
-            model="gpt-4o",
             stream=True,
         )
 
@@ -163,8 +150,6 @@ def test_raw_response_create_overload_2(self, client: OpenAI) -> None:
     @parametrize
     def test_streaming_response_create_overload_2(self, client: OpenAI) -> None:
         with client.responses.with_streaming_response.create(
-            input="string",
-            model="gpt-4o",
             stream=True,
         ) as response:
             assert not response.is_closed
@@ -358,22 +343,19 @@ class TestAsyncResponses:
 
     @parametrize
     async def test_method_create_overload_1(self, async_client: AsyncOpenAI) -> None:
-        response = await async_client.responses.create(
-            input="string",
-            model="gpt-4o",
-        )
+        response = await async_client.responses.create()
         assert_matches_type(Response, response, path=["response"])
 
     @parametrize
     async def test_method_create_with_all_params_overload_1(self, async_client: AsyncOpenAI) -> None:
         response = await async_client.responses.create(
-            input="string",
-            model="gpt-4o",
             background=True,
             include=["file_search_call.results"],
+            input="string",
             instructions="instructions",
             max_output_tokens=0,
             metadata={"foo": "string"},
+            model="gpt-4o",
             parallel_tool_calls=True,
             previous_response_id="previous_response_id",
             prompt={
@@ -409,10 +391,7 @@ async def test_method_create_with_all_params_overload_1(self, async_client: Asyn
 
     @parametrize
     async def test_raw_response_create_overload_1(self, async_client: AsyncOpenAI) -> None:
-        http_response = await async_client.responses.with_raw_response.create(
-            input="string",
-            model="gpt-4o",
-        )
+        http_response = await async_client.responses.with_raw_response.create()
 
         assert http_response.is_closed is True
         assert http_response.http_request.headers.get("X-Stainless-Lang") == "python"
@@ -421,10 +400,7 @@ async def test_raw_response_create_overload_1(self, async_client: AsyncOpenAI) -
 
     @parametrize
     async def test_streaming_response_create_overload_1(self, async_client: AsyncOpenAI) -> None:
-        async with async_client.responses.with_streaming_response.create(
-            input="string",
-            model="gpt-4o",
-        ) as http_response:
+        async with async_client.responses.with_streaming_response.create() as http_response:
             assert not http_response.is_closed
             assert http_response.http_request.headers.get("X-Stainless-Lang") == "python"
 
@@ -436,8 +412,6 @@ async def test_streaming_response_create_overload_1(self, async_client: AsyncOpe
     @parametrize
     async def test_method_create_overload_2(self, async_client: AsyncOpenAI) -> None:
         response_stream = await async_client.responses.create(
-            input="string",
-            model="gpt-4o",
             stream=True,
         )
         await response_stream.response.aclose()
@@ -445,14 +419,14 @@ async def test_method_create_overload_2(self, async_client: AsyncOpenAI) -> None
     @parametrize
     async def test_method_create_with_all_params_overload_2(self, async_client: AsyncOpenAI) -> None:
         response_stream = await async_client.responses.create(
-            input="string",
-            model="gpt-4o",
             stream=True,
             background=True,
             include=["file_search_call.results"],
+            input="string",
             instructions="instructions",
             max_output_tokens=0,
             metadata={"foo": "string"},
+            model="gpt-4o",
             parallel_tool_calls=True,
             previous_response_id="previous_response_id",
             prompt={
@@ -488,8 +462,6 @@ async def test_method_create_with_all_params_overload_2(self, async_client: Asyn
     @parametrize
     async def test_raw_response_create_overload_2(self, async_client: AsyncOpenAI) -> None:
         response = await async_client.responses.with_raw_response.create(
-            input="string",
-            model="gpt-4o",
             stream=True,
         )
 
@@ -500,8 +472,6 @@ async def test_raw_response_create_overload_2(self, async_client: AsyncOpenAI) -
     @parametrize
     async def test_streaming_response_create_overload_2(self, async_client: AsyncOpenAI) -> None:
         async with async_client.responses.with_streaming_response.create(
-            input="string",
-            model="gpt-4o",
             stream=True,
         ) as response:
             assert not response.is_closed