Optional additional JSON properties to include in the request parameters when making requests to OpenAI compatible APIs, such as vLLM, LM Studio, or other providers.
This is the recommended way to pass custom parameters that are specific to your OpenAI-compatible API provider but not part of the standard OpenAI API.
Do not use model_kwargs for custom parameters that are not part of the
standard OpenAI API, as this will cause errors when making API calls. Use
extra_body instead.
