Feature Request: Support JSON Format Output for Pydantic Objects

[42elenz]

Hi 👋,

It would be great if your library/tool could support native handling of Pydantic models for generating JSON outputs, for the json mode of some models.

Use Case:
I'm working with Pydantic objects and need to put them into the insturction-JSON .
Thanks for considering!

example:
models = [
("openai", "gpt-4.1", {"n":1, "temperature":0, "max_tokens":max_tokens, "text_format": list[Receips]}),
("gemini", "gemini-1.5-flash", {"candidate_count": 1, "temperature": 0, "response_mime_type": "application/json", "response_schema": list[Receips]})
]