Unverified50% confidenceFactExact time
When tool definitions and reasoning_effort are sent to gpt-5.6-luna at the same time, the API returns 400, and the response body states that function tools with reasoning_effort are not supported and suggests using /v1/responses or setting reasoning_effort to 'none'.
1
Sources
50%
Confidence
Medium-term (~90 days)
Relevance
10/19/2026
First Seen
Valid until: 1/17/2027
Sources
Related Entities
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