Invalid schema for response_format: required fields are missing or extra keys are supplied. Ensure the schema has all necessary keys and no redundant ones.

The 400 status error you are encountering, specifically the "Invalid schema for response_format" error, is likely due to several reasons related to the structure and content of your request payload:

Invalid or Missing Schema

The error indicates that the JSON schema provided for the response_format does not match the expected schema. This could be because the schema is missing required fields or includes extra fields that are not recognized.

Incorrectly Defined Properties

The required field in your schema may not include all the necessary keys from the properties, or it might include extra keys that are not supposed to be there. For example, the error mentions an "extra required key 'original' supplied," which suggests a mismatch between the expected and provided schema.

Model-Specific Requirements

Different OpenAI models may have specific requirements for the schema and parameters. If the schema does not conform to these model-specific needs, it can result in a 400 error.

Header and Content-Type Issues

Although less likely in this specific case, incorrect headers, such as an incorrect Content-Type header (which should be application/json), can also lead to 400 errors.