API - Returned JSON Format Validation?

A developer using OpenAI's API is encountering frequent issues with the returned JSON format. Despite implementing guardrails, the API often provides responses with errors in the JSON structure, making them invalid. The user's complex query requires 42 nested responses in a specific JSON format, and while the content of the responses is often correct, the formatting errors are a persistent problem.

This report highlights a specific challenge with OpenAI's API, where content is often correct but JSON formatting consistently fails for complex, deeply nested responses, unlike simpler queries.