https://openai.com/index/introducing-structured-outputs-in-the-api/
gpt-4o-2024-08-06 引入了 Structured Outputs ，旨在改善 JSON 输出的可靠性
OpenAI
Introducing Structured Outputs in the API
We are introducing Structured Outputs in the API—model outputs now reliably adhere to developer-supplied JSON Schemas.
