I may be reading the documentation wrong [0], but I think if you specify `json_schema`, you actually have to provide a schema. I get this error when I do `response_format={"type": "json_schema"}`:

     openai.BadRequestError: Error code: 400 - {'error': {'message': "Missing required parameter: 'response_format.json_schema'.", 'type': 'invalid_request_error', 'param': 'response_format.json_schema', 'code': 'missing_required_parameter'}}

I hadn't used OpenAI for data extraction before the announcement of Structured Outputs, so not sure if `type: json_object` did something different before. But supplying only it as the response format seems to be the (low effort) way to have the API infer the structure on its own

[0] https://platform.openai.com/docs/guides/structured-outputs/s...