The provided JSON is not of the expected 'object' type for the response format specification.

The 400 status error in the OpenAI API with the message 'json' is not of type 'object' - 'response_format' is typically due to several possible reasons:

Incorrect Use of response_format Parameter

The response_format parameter may be incorrectly configured or not supported by the model you are using. For example, some models like gpt-3.5-turbo do not support the json_object response format, leading to a validation error.

Invalid Request Body

The error could indicate that the JSON payload sent in the request is not valid or does not match the expected format. This might be due to incorrect use of the HTTP library or a mismatch in the expected JSON structure.

Extra Fields Not Permitted

The error message may also suggest that there are extra fields in the request body that are not permitted, which can occur if the response_format parameter includes fields that are not allowed for the specific endpoint or model being used.

These issues generally stem from incorrect configuration or invalid data in the request, leading the server to return a Bad Request error.