Claude Opus 4.6 vs Claude Sonnet 4.5
Head to head on 28 shared benchmarks, with price, context window, and release dates.
Benchmark scores
93evals · sort by any column, ⤢ to expand fullscreen
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| Claude Opus 4.6 Anthropic | 99.79 | 67.0% | 1809elo | 77.7 | 40.7% | 89.6% | 39.9% | 53.1% | 84.9% | 78.8% | 78.2% | 69.9% | 63.3% | 83.3% | 89.3% | 88.7% | 48.2% | 86.7% | 68.5% | 50.0% | 51.6% | 51.9% | 72.0% | 75.6% | 76.0% | 46.2% | 57.6% | 92.1% | - | - | - | - | - | - | 56.1% | 1.5 | - | - | 2.08 | - | - | 69.0% | - | - | 1223elo | - | - | - | - | - | - | - | - | - | - | - | 88771 | 58 | - | - | - | - | - | - | 78.5% | - | - | - | 93 | - | - | - | - | - | - | - | - | - | - | - | 44.5 | - | - | - | - | - | - | - | - | 80.6 | - | - | - | 68.1% |
| Claude Sonnet 4.5 Anthropic | 100 | 60.8% | 1678elo | 71.4 | 15.2% | 83.4% | 17.8% | 57.3% | 83.8% | 70.7% | 80.4% | 57.0% | 53.4% | 76.5% | 79.3% | 77.6% | 40.6% | 84.5% | 64.0% | 19.0% | 32.9% | 45.7% | 67.0% | 74.8% | 73.3% | 35.6% | 22.6% | 78.1% | 0.0% | 0.0% | 88.0% | 0.0% | 0.0% | 0.0% | - | - | 5.0% | 0.0% | - | 0.0% | 0.0% | - | 0.0% | 0.0% | - | 0.0% | 0.0% | 0.0% | 0.0% | 83.9% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 87.5% | - | - | 0.0% | 0.0% | 71.4% | 0.75 | 0.75 | 0.0% | - | 0 | 0 | 87.5% | - | 0.0% | 0.0% | 62.9% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | - | 0 | 0.0% | 0.0% | 77.2% | 0.0% | 0 | 0 | 50.34 | - | 0 | 0.0% | 1.49 | 29.2% |
2 / 2 models
| Attribute | Claude Opus 4.6 Anthropic | Claude Sonnet 4.5 Anthropic |
|---|---|---|
| Description | Claude Opus 4.6 is an AI model from Anthropic. | anthropic/claude-sonnet-4.5 is an AI model. |
| Family | Claude | Claude |
| Params | - | Undisclosed (closed) |
| Open weights | closed | closed |
| License | proprietary | proprietary |
| Released | 5 Feb 2026 | 29 Sep 2025 |
| Context | 1,000,000 | 1,000,000 |
| Input $/1M | $5.00 | $3.00 |
| Output $/1M | $25.00 | $15.00 |
| Cache read $/1M | $0.500 | $0.300 |
| Cache write $/1M | $6.250 | $3.750 |
| Speed | 0 tok/s | 0 tok/s |
| Latency | 0.00 s | 0.00 s |
| Modalities | text, image, file | text, image, file |
| Providers | - | anthropic, aws-bedrock, vertex-ai |
| Publisher | Anthropic | Anthropic |
| Reported scores | GPQA Diamond89.6% (AA) Humanity's Last Exam (HLE)39.9% (AA) SciCode51.9% (AA) τ²-bench (Tau²-bench)92.1% (AA) Terminal-Bench (Hard)46.2% (AA) | TaxEval v273.3% LiveBench - Math79.3% (LiveBench) LiveBench - Coding80.4% (LiveBench) LiveBench - Language76.5% (LiveBench) LiveBench - Data Analysis57.0% (LiveBench) |
FAQ
- Is Claude Opus 4.6 or Claude Sonnet 4.5 better?
- Across the 28 benchmarks both models report on Sophon, Claude Opus 4.6 leads on 25 of them. Which one is "better" depends on the benchmark - the table above shows every shared score.
- How do Claude Opus 4.6 and Claude Sonnet 4.5 compare on GPQA Diamond?
- Claude Opus 4.6 scores 89.6% and Claude Sonnet 4.5 scores 83.4% on GPQA Diamond.
- Which is cheaper, Claude Opus 4.6 or Claude Sonnet 4.5?
- Claude Sonnet 4.5 is cheaper at $15.00 per million output tokens against $25.00 for Claude Opus 4.6 - about 1.7x.
- When were Claude Opus 4.6 and Claude Sonnet 4.5 released?
- Claude Opus 4.6 was released 5 Feb 2026 by Anthropic. Claude Sonnet 4.5 was released 29 Sep 2025 by Anthropic.
Other head-to-heads
56Claude Sonnet 4.5 vs GPT-4.1 Mini35 shared evalsClaude Opus 4.5 vs Claude Sonnet 4.534 shared evalsClaude Opus 4.6 vs GPT-5.433 shared evalsClaude Sonnet 4.5 vs GPT-5.232 shared evalsClaude Sonnet 4.5 vs GPT-5 Mini31 shared evalsClaude Sonnet 4.5 vs GPT-531 shared evalsClaude Sonnet 4.5 vs GPT-5 Nano31 shared evalsClaude Opus 4.6 vs Gemini 3.1 Pro Preview31 shared evalsClaude Opus 4.6 vs Kimi K2.531 shared evalsClaude Opus 4.6 vs GPT-5.230 shared evalsClaude Opus 4.6 vs Claude Opus 4.729 shared evalsClaude 4 Sonnet vs Claude Sonnet 4.528 shared evalsClaude Sonnet 4.5 vs Kimi K2.528 shared evalsClaude Sonnet 4.5 vs Grok 4.1 Fast28 shared evalsClaude Opus 4.6 vs GPT-5 Mini28 shared evalsClaude Opus 4.6 vs GPT-5.528 shared evalsClaude Opus 4.6 vs Claude Opus 4.828 shared evalsClaude Opus 4.5 vs Claude Opus 4.628 shared evalsClaude Opus 4.6 vs Claude Sonnet 4.628 shared evalsClaude Sonnet 4.5 vs Gemini 3.1 Pro Preview27 shared evalsClaude Sonnet 4.5 vs DeepSeek V3.227 shared evalsClaude Opus 4.6 vs GLM 5.127 shared evalsClaude Sonnet 4.5 vs GPT-5.526 shared evalsClaude Sonnet 4.5 vs GPT-5.426 shared evalsClaude Sonnet 4.5 vs Gemini 2.5 Pro26 shared evalsClaude Fable 5 vs Claude Opus 4.626 shared evalsClaude Opus 4.6 vs DeepSeek V3.226 shared evalsClaude Opus 4.8 vs Claude Sonnet 4.525 shared evalsClaude Sonnet 4.5 vs GLM 4.725 shared evalsClaude Opus 4.6 vs Grok 4.1 Fast25 shared evalsClaude Opus 4.6 vs GPT-5.4 Mini25 shared evalsClaude Fable 5 vs Claude Sonnet 4.524 shared evalsClaude Sonnet 4.5 vs Claude Sonnet 4.624 shared evalsClaude Opus 4.7 vs Claude Sonnet 4.524 shared evalsClaude Opus 4.6 vs Qwen3.6 Plus24 shared evalsClaude Sonnet 4.5 vs GLM 5.123 shared evalsClaude Sonnet 4.5 vs gpt-oss-120b23 shared evalsClaude Sonnet 4.5 vs GPT-5.4 Mini23 shared evalsClaude Opus 4.6 vs GPT-5 Nano23 shared evalsClaude Sonnet 4.5 vs Qwen3.6 Plus22 shared evalsClaude 4 Sonnet vs Claude Opus 4.622 shared evalsClaude Sonnet 4.5 vs GPT-4o21 shared evalsClaude Opus 4.6 vs Gemini 2.5 Pro21 shared evalsClaude Opus 4.6 vs GLM 4.721 shared evalsClaude Sonnet 4.5 vs GPT-4.119 shared evalsClaude Opus 4.6 vs GPT-519 shared evalsClaude Opus 4.6 vs gpt-oss-120b19 shared evalsClaude Sonnet 4.5 vs GPT-4o-mini17 shared evalsClaude Sonnet 4.5 vs GPT-4.1 Nano16 shared evalsClaude Opus 4.6 vs GPT-4o15 shared evalsClaude Opus 4.6 vs GPT-4.1 Mini13 shared evalsClaude Opus 4.6 vs GPT-4.113 shared evalsClaude Opus 4.6 vs GPT-6 Astra13 shared evalsClaude Opus 4.6 vs GPT-4o-mini12 shared evalsClaude Opus 4.6 vs GPT-4.1 Nano12 shared evalsClaude Sonnet 4.5 vs GPT-6 Astra11 shared evals
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