Claude Opus 4.5 tackles complex, multi-step reasoning with patience and thoroughness — it tends to think through problems carefully rather than rushing to an answer. It handles nuanced writing, intricate analysis, and difficult conceptual work with notable depth, though this deliberateness comes at the cost of speed and higher token pricing compared to lighter models. It communicates with a measured, articulate tone that suits demanding intellectual tasks.
| Benchmark | Score | Type | Recorded |
|---|---|---|---|
| IFBench | 58.0 | prompt_level_loose_accuracy | 5d ago |
| LCR | 65.3 | pass@1_accuracy | 5d ago |