X-TFY-STRICT-OPENAI
header is not included in the request, the response remains fully OpenAI-compliant. However, enabling thinking/reasoning tokens makes the response no longer OpenAI-compliant, as it introduces an additional reasoning layer that OpenAI’s compliance framework does not support.
A standard OpenAI-compliant response structure looks like this:
thinking
field in the request body:thinking
section is always sent before the content
section.
Example Chunk - Thinking Token: