GPT-5.1 is the latest frontier-grade model in the GPT-5 series, offering stronger general-purpose reasoning, improved instruction adherence, and a more natural conversational style compared to GPT-5. It uses adaptive reasoning...
In / out price$1.25/$10.00per 1M tokens
Context
400K tokens
Parameters
Undisclosed
Modalities
→
Released
Nov 13, 2025
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