Claude Opus 4
ECI#90
143Claude Opus 4 is a closed-weights model from Anthropic, released May 22, 2025. It has an ECI score of 143 and ranks 90th of 249 tracked models. At the time of its release, it ranked 4th of 139 tracked models. At $15/Mtok for input tokens and $75/Mtok for output tokens, it is more expensive per token than similarly-capable models.
Input price$15 / 1M tokens
Output price$75 / 1M tokens
ParametersUnknown
Training computeUnknown
Claude Opus 4 vs select alternatives
Reasoning
| Domain | Benchmark | Claude Opus 4 | |||
|---|---|---|---|---|---|
ECI scoreBest score 166 | 143 | 141 | 147 | 144 | |
| Ranking | #90 | #103 | #60 | #82 | |
| Conceptual reasoning | ARC-AGI-2Best score 95.0% | ||||
ARC-AGI-1Best score 98.5% | |||||
| Mathematics | MATH Level 5Best score 98.1% | ||||
OTIS Mock AIME 2024-2025Best score 100.0% | |||||
| Science | Humanity's Last ExamBest score 46.5% | ||||
GPQA DiamondBest score 95.8% | |||||
| Software engineering | METR Time HorizonsBest score 1044.8 | 100.4 | 60.4 | 119.7 | — |
SWE-bench VerifiedBest score 83.5% | |||||
Aider PolyglotBest score 88.0% |
