Anthropic
Claude Opus 4.1 benchmark results
17 results on 8 benchmarks from 3 sources.
Also listed as: claude-opus-4-1-20250805-thinking-16k · claude-opus-4-1-20250805 · claude-opus-4-1-20250805_27K · claude-opus-4-1-20250805_16K · claude-opus-4-1-20250805_unknown · Claude Opus 4.1 (unknown thinking) · claude-opus-4-1-20250805-thinking
All benchmark results
| Benchmarks | Score | Rank | Setting | Source type | Date |
|---|---|---|---|---|---|
| LMArena Text | 1450 | 79 | Overall, style control on; 49555 votes; 95% CI 1446–1453“claude-opus-4-1-20250805-thinking-16k” | Official leaderboard | Oct 8, 2026 |
| LMArena Text | 1448 | 81 | Overall, style control on; 77252 votes; 95% CI 1445–1451“claude-opus-4-1-20250805” | Official leaderboard | Oct 8, 2026 |
| LMArena WebDev | 1390 | 95 | Overall; 6926 votes; 95% CI 1379–1401“claude-opus-4-1-20250805” | Official leaderboard | Oct 8, 2026 |
| GPQA Diamond | 76.8% | 129 | Epoch AI run, accuracy | Independent run | Aug 5, 2025 |
| SWE-bench Verified | 73.3% | 20 | Epoch AI run (Epoch scaffold) | Independent run | Feb 11, 2026 |
| AIME (OTIS Mock AIME 2024–2025) | 68.9% | 131 | Epoch AI run, OTIS Mock AIME 2024–2025 | Independent run | Aug 5, 2025 |
| Humanity's Last Exam | 11.5% | 31 | Compiled by Epoch AI; effort: unknown thinking | Third-party compilation via Epoch AI | Aug 5, 2025 |
| τ²-bench | 56.0% | 19 | airline domain, pass^1; submitted by Anthropic; voriginal tau-bench | Vendor-reported | Aug 5, 2025 |
| τ²-bench | 82.4% | 6 | retail domain, pass^1; submitted by Anthropic; voriginal tau-bench | Vendor-reported | Aug 5, 2025 |
| Terminal-Bench 2.0 | 38.0% | 103 | Terminal-Bench 2.0; agent: Terminus 2 | Official leaderboard via Epoch AI | Oct 31, 2025 |
| Terminal-Bench 2.0 | 38.0% | 104 | Terminal-Bench 2.0; agent: Terminus 2; effort: unknown thinking | Official leaderboard via Epoch AI | Aug 5, 2025 |
| Terminal-Bench 2.0 | 36.9% | 105 | Terminal-Bench 2.0; agent: OpenHands | Official leaderboard via Epoch AI | Nov 2, 2025 |
| Terminal-Bench 2.0 | 36.9% | 107 | Terminal-Bench 2.0; agent: OpenHands; effort: unknown thinking | Official leaderboard via Epoch AI | Aug 5, 2025 |
| Terminal-Bench 2.0 | 35.1% | 115 | Terminal-Bench 2.0; agent: Mini-SWE-Agent | Official leaderboard via Epoch AI | Nov 3, 2025 |
| Terminal-Bench 2.0 | 35.1% | 116 | Terminal-Bench 2.0; agent: Mini-SWE-Agent; effort: unknown thinking | Official leaderboard via Epoch AI | Aug 5, 2025 |
| Terminal-Bench 2.0 | 34.8% | 117 | Terminal-Bench 2.0; agent: Claude Code; effort: unknown thinking | Official leaderboard via Epoch AI | Aug 5, 2025 |
| Terminal-Bench 2.0 | 34.8% | 119 | Terminal-Bench 2.0; agent: Claude Code | Official leaderboard via Epoch AI | Nov 4, 2025 |
FAQ
Where do these Claude Opus 4.1 scores come from?
From Epoch AI Benchmarking Hub, LMArena leaderboard dataset, and τ²-bench leaderboard submissions. Each row links to the original leaderboard, dataset or report, and vendor-reported numbers are labelled.