Claude Opus 4.7
ECI#22
156Claude Opus 4.7 is a closed-weights model from Anthropic, released April 16, 2026. It has an ECI score of 156 and ranks 22nd of 253 tracked models. At the time of its release, it ranked 4th of 203 tracked models.
Claude Opus 4.7 vs select alternatives
| Domain | Benchmark | Claude Opus 4.7 | |||
|---|---|---|---|---|---|
ECI scoreBest score 167 | 156 | 155 | 159 | 155 | |
| Ranking | #22 | #27 | #11 | #31 | |
| 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 100% | |||||
| Multimodal | Furniture Assembly BenchmarkBest score 83% | ||||
| Software engineering | MirrorCodeBest score 77% | ||||
SWE-bench VerifiedBest score 83% | |||||
| World knowledge | SimpleQA VerifiedBest score 76% |
