community: add new parameters to pass to OpenAIAssistantV2Runnable (l…

…angchain-ai#27372)

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**Description:** Added the model parameters to be passed in the OpenAI
Assistant. Enabled it at the `OpenAIAssistantV2Runnable` class.
 **Issue:** NA
  **Dependencies:** None
  **Twitter handle:** luizf0992

libs/community/langchain_community/agents/openai_assistant/base.py

@@ -227,8 +227,10 @@ def create_assistant(
         tools: Sequence[Union[BaseTool, dict]],
         model: str,
         *,
+        model_kwargs: dict[str, float] = {},
         client: Optional[Union[openai.OpenAI, openai.AzureOpenAI]] = None,
         tool_resources: Optional[Union[AssistantToolResources, dict, NotGiven]] = None,
+        extra_body: Optional[object] = None,
         **kwargs: Any,
     ) -> OpenAIAssistantRunnable:
         """Create an OpenAI Assistant and instantiate the Runnable.
@@ -241,6 +243,9 @@ def create_assistant(
             model: Assistant model to use.
             client: OpenAI or AzureOpenAI client.
                 Will create default OpenAI client (Assistant v2) if not specified.
+            model_kwargs: Additional model arguments. Only available for temperature
+            and top_p parameters.
+            extra_body: Additional body parameters to be passed to the assistant.
 
         Returns:
             OpenAIAssistantRunnable configured to run using the created assistant.
@@ -257,6 +262,8 @@ def create_assistant(
             tools=[_get_assistants_tool(tool) for tool in tools],  # type: ignore
             tool_resources=tool_resources,  # type: ignore[arg-type]
             model=model,
+            extra_body=extra_body,
+            **model_kwargs,
         )
         return cls(assistant_id=assistant.id, client=client, **kwargs)