Claude Opus 4
ECI#96
143Claude Opus 4 is a closed-weights model from Anthropic, released May 22, 2025. It has an ECI score of 143 and ranks 96th of 253 tracked models. At the time of its release, it ranked 4th of 139 tracked models.
Claude Opus 4 vs select alternatives
| Domain | Benchmark | Claude Opus 4 | |||
|---|---|---|---|---|---|
ECI scoreBest score 167 | 143 | 141 | 147 | 144 | |
| Ranking | #96 | #108 | #65 | #87 | |
| Conceptual reasoning | ARC-AGI-2Best score 95% | ||||
ARC-AGI-1Best score 99% | |||||
| Mathematics | MATH Level 5Best score 98% | ||||
OTIS Mock AIME 2024-2025Best score 100% | |||||
| Science | Humanity's Last ExamBest score 55% | ||||
GPQA DiamondBest score 96% | |||||
| Software engineering | METR Time HorizonsBest score 17 hr 25 min | 1 hr 40 min | 1 hr | 2 hr | — |
SWE-bench VerifiedBest score 83% | |||||
Aider PolyglotBest score 88% |
