datamodel-code-generator

Generate Pydantic v2 models, dataclasses, TypedDict, and msgspec.Struct from OpenAPI, JSON Schema, GraphQL, Avro, Protobuf, and raw JSON/YAML/CSV. Maintained by koxudaxi on GitHub, where it has earned 3,993 stars from the community.

It's actively developed around openapi, code-generator, python, and is a solid reference for anyone building with these tools.