GPT-5 mini
ECI#75
146GPT-5 mini is a closed-weights model from OpenAI, released August 7, 2025. It has an ECI score of 146 and ranks 75th of 249 tracked models. At the time of its release, it ranked 6th of 159 tracked models.
GPT-5 mini vs select alternatives
| Domain | Benchmark | GPT-5 mini | |||
|---|---|---|---|---|---|
ECI scoreBest score 166 | 146 | 142 | 146 | 147 | |
| Ranking | #75 | #98 | #74 | #61 | |
| Games | Chess PuzzlesBest score 72% | ||||
Mystery Game PuzzlesBest score 84% | |||||
| Mathematics | FrontierMath Tiers 1-3 (v2)Best score 94% | ||||
FrontierMath Tier 4 (v2)Best score 98% | |||||
MATH Level 5Best 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% |
