Claude Opus 4.5: benchmark results
Anthropic Opus-tier Claude model for complex reasoning, coding, and writing. Provider: Anthropic. Released 2025-11-24. Access: API.
Aggregate Rating 1779 ± 3, rank #83 of 1656 rated models, from 1369 benchmark results.
Strongest benchmark results
| Benchmark | Score | Metric | Percentile |
|---|---|---|---|
| AA Omniscience - Software Engineering (SWE) - Go | 70 | Accuracy (%) | 100 |
| AA Omniscience - Software Engineering (SWE) - Julia | 68 | Accuracy (%) | 100 |
| AA Omniscience - Software Engineering (SWE) - PHP | 84 | Accuracy (%) | 100 |
| AA Omniscience - Software Engineering (SWE) - Python | 74.5 | Accuracy (%) | 100 |
| ACE-Bench (Azure SDK) | 39.4 | Strict pass rate (%) on ACE-Bench (353 Azure SDK coding task | 100 |
| AGC-Bench - scar | 1.12 | Dataset z-score | 100 |
| AGC-Bench - speak_to_structure | 1.51 | Dataset z-score | 100 |
| AI-Needle (BenchLM) | 74 | Accuracy (%) | 100 |
| AJ-Bench (LLM-as-a-Judge) - Excel | 75.77 | F1 (%) on Excel GUI tasks (OSWorld; 19 tasks, 38 trajectorie | 100 |
| ASCIIBench | 1727 | ELO Rating | 100 |
| ASTRA-bench | 91.12 | Task-completion score of a gpt-5.1-2025-11-13 judge against | 100 |
| ASTRA-bench - Payload Generation | 84.78 | Step-level payload milestone similarity (0-1, shown times 10 | 100 |
Interactive version: theaggregate.ai/model?slug=claude-opus-4-5 · How It Works · Data refreshed daily, snapshot 2026-10-20.