Intelligence index
Outperforms 67% of compared models

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 to allocate computation dynamically, responding quickly to simple queries while spending more depth on complex tasks. The model produces clearer, more grounded explanations with reduced jargon, making it easier to follow even on technical or multi-step problems.
Built for broad task coverage, GPT-5.1 delivers consistent gains across math, coding, and structured analysis workloads, with more coherent long-form answers and improved tool-use reliability. It also features refined conversational alignment, enabling warmer, more intuitive responses without compromising precision. GPT-5.1 serves as the primary full-capability successor to GPT-5
Outperforms 67% of compared models
Outperforms 52% of compared models
Elo scores and win rates across design and agent tasks.
1146Elo
Win rate 57.4%
1116Elo
Win rate 48.6%
1204Elo
Win rate 58%
1177Elo
Win rate 55.9%
1161Elo
Win rate 52.9%
1185Elo
Win rate 54%
1169Elo
Win rate 53%
1058Elo
Win rate 43.7%