### Confirm this is a feature request for the Python library and not the underlying OpenAI API. - [x] This is a feature request for the Python library ### Describe the feature or improvement you're requesting https://github.com/openai/openai-python/blob/main/src/openai/types/chat/completion_create_params.py should be a pydantic model. This is often needed for local servers, today they have to create a separate pydantic definition to support it. ### Additional context _No response_