gpt-oss-120b
ECI#124
140gpt-oss-120b is an open-weights model from OpenAI, released August 5, 2025. It has an ECI score of 140 and ranks 124th of 253 tracked models. At the time of its release, it ranked 21st of 148 tracked models.
gpt-oss-120b vs select alternatives
| Domain | Benchmark | gpt-oss-120b | |||
|---|---|---|---|---|---|
ECI scoreBest score 169 | 140 | 137 | 140 | 140 | |
| Ranking | #124 | #137 | #120 | #121 | |
| Conceptual reasoning | SimpleBenchBest score 82% | ||||
| Games | Mystery Game PuzzlesBest score 84% | ||||
| Mathematics | OTIS Mock AIME 2024-2025Best score 100% | ||||
| Science | CritPt v1Best score 32% | ||||
SciCodeBest score 67% | |||||
GPQA DiamondBest score 96% | |||||
| Software engineering | Terminal-Bench 2.0Best score 85% | ||||
Aider PolyglotBest score 88% | |||||
WeirdML (v2)Best score 94% |
