We will work with our team to get this reviewed again but just to be sure as per our docs we encourage using structured outputs as structured outputs is the evolution of JSON mode. While both ensure valid JSON is produced, only Structured Outputs ensure schema adherence. Both Structured Outputs and JSON mode are supported in the Responses API, Chat Completions API, Assistants API, Fine-tuning API and Batch API. Furthermore, @_j we have our team looking into this issue which is slightly different from what being discussed here.