GPT-5.2
ECI#34
154GPT-5.2 is a closed-weights model from OpenAI, released December 11, 2025. It has an ECI score of 154 and ranks 34th of 249 tracked models. At the time of its release, it ranked 2nd of 176 tracked models.
GPT-5.2 vs select alternatives
| Domain | Benchmark | GPT-5.2 | |||
|---|---|---|---|---|---|
ECI scoreBest score 166 | 154 | 150 | 153 | 150 | |
| Ranking | #34 | #43 | #35 | #45 | |
| Games | Chess PuzzlesBest score 72% | ||||
Earthborne Rangers (EBR-bench)Best score 76% | |||||
Mystery Game PuzzlesBest score 84% | |||||
| Mathematics | FrontierMath Tiers 1-3 (v2)Best score 94% | ||||
FrontierMath Tier 4 (v2)Best score 98% | |||||
OTIS Mock AIME 2024-2025Best score 100% | |||||
| Science | GPQA DiamondBest score 96% | ||||
| Software engineering | SWE-bench VerifiedBest score 83% | ||||
| World knowledge | SimpleQA VerifiedBest score 76% |
