GPT-5.1
ECI#49
150GPT-5.1 is a closed-weights model from OpenAI, released November 13, 2025. It has an ECI score of 150 and ranks 49th of 249 tracked models. At the time of its release, it ranked 3rd of 171 tracked models.
GPT-5.1 vs select alternatives
| Domain | Benchmark | GPT-5.1 | |||
|---|---|---|---|---|---|
ECI scoreBest score 166 | 150 | 150 | 147 | 146 | |
| Ranking | #49 | #43 | #61 | #66 | |
| Conceptual reasoning | ARC-AGI-2Best score 95% | ||||
ARC-AGI-1Best score 99% | |||||
| Games | Chess PuzzlesBest score 72% | ||||
Mystery Game PuzzlesBest score 84% | |||||
| Mathematics | OTIS Mock AIME 2024-2025Best score 100% | ||||
| Science | Humanity's Last ExamBest score 47% | ||||
GPQA DiamondBest score 96% | |||||
| Software engineering | SWE-bench VerifiedBest score 83% | ||||
| World knowledge | SimpleQA VerifiedBest score 76% |
