Claude Opus 4.5 vs Claude Sonnet 4.6
Head to head on 23 shared benchmarks, with price, context window, and release dates.
Benchmark scores
53evals · sort by any column, ⤢ to expand fullscreen
| Model | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Claude Opus 4.5 Anthropic | 61.3% | 1687elo | 73.1 | 20.7% | 86.6% | 30.1% | 58.0% | 83.5% | 78.1% | 79.7% | 74.4% | 62.5% | 81.3% | 90.4% | 80.1% | 68.7% | 36.0% | 45.0% | 49.5% | 74.3% | 47.0% | 20.6% | 89.5% | - | 91.3% | - | - | 16.7% | - | - | 35.6% | 6.1% | - | - | 84.7% | 12.13 | 83.8% | 87.1% | 45.2% | 83.2% | 89.5% | - | 100.0% | 37.4 | - | 77.5% | 45.3 | 70.7% | 79.2% | 61.8 | - | - | - | 64.8% |
| Claude Sonnet 4.6 Anthropic | 65.3% | 1810elo | 79.9 | 32.4% | 87.5% | 33.6% | 56.6% | 92.2% | 78.4% | 80.0% | 76.1% | 63.9% | 77.7% | 86.5% | 86.4% | 67.7% | 45.0% | 46.6% | 50.1% | 77.1% | 53.0% | 51.5% | 75.7% | 87.1% | - | 47.2% | 47.6% | - | 1.35 | 76.0% | - | - | 1207elo | 51.0% | - | - | - | - | - | - | - | 89.3 | - | - | 72.1% | - | - | - | - | - | 76.3 | 50.6% | 60.6% | 64.7% |
2 / 2 models
| Attribute | Claude Opus 4.5 Anthropic | Claude Sonnet 4.6 Anthropic |
|---|---|---|
| Description | Claude Opus 4.5 is an AI model from Anthropic. | Claude Sonnet 4.6 is an AI model from Anthropic. |
| Family | Claude | Claude |
| Params | - | - |
| Open weights | closed | closed |
| License | proprietary | proprietary |
| Released | 24 Nov 2025 | 17 Feb 2026 |
| Context | 200,000 | 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 | file, image, text | text, image, file |
| Providers | - | - |
| Publisher | Anthropic | Anthropic |
| Reported scores |
FAQ
- Is Claude Opus 4.5 or Claude Sonnet 4.6 better?
- Across the 23 benchmarks both models report on Sophon, Claude Sonnet 4.6 leads on 18 of them. Which one is "better" depends on the benchmark - the table above shows every shared score.
- How do Claude Opus 4.5 and Claude Sonnet 4.6 compare on GPQA Diamond?
- Claude Opus 4.5 scores 86.6% and Claude Sonnet 4.6 scores 87.5% on GPQA Diamond.
- Which is cheaper, Claude Opus 4.5 or Claude Sonnet 4.6?
- Claude Sonnet 4.6 is cheaper at $15.00 per million output tokens against $25.00 for Claude Opus 4.5 - about 1.7x.
- When were Claude Opus 4.5 and Claude Sonnet 4.6 released?
- Claude Opus 4.5 was released 24 Nov 2025 by Anthropic. Claude Sonnet 4.6 was released 17 Feb 2026 by Anthropic.
Other head-to-heads
56Claude Opus 4.5 vs GPT-5.235 shared evalsClaude Opus 4.5 vs Claude Sonnet 4.534 shared evalsClaude Sonnet 4.6 vs Gemini 3.1 Pro Preview32 shared evalsClaude Opus 4.5 vs GPT-5 Mini31 shared evalsClaude Sonnet 4.6 vs GPT-5.530 shared evalsClaude Opus 4.8 vs Claude Sonnet 4.629 shared evalsClaude Opus 4.5 vs Grok 4.1 Fast29 shared evalsClaude Opus 4.7 vs Claude Sonnet 4.629 shared evalsClaude Opus 4.5 vs Gemini 3.1 Pro Preview28 shared evalsClaude Opus 4.5 vs GPT-5.428 shared evalsClaude Opus 4.5 vs Claude Opus 4.628 shared evalsClaude Fable 5 vs Claude Sonnet 4.628 shared evalsClaude Sonnet 4.6 vs GPT-5.428 shared evalsClaude Opus 4.6 vs Claude Sonnet 4.628 shared evalsClaude Sonnet 4.6 vs GPT-5.4 Mini28 shared evalsClaude Opus 4.5 vs DeepSeek V3.227 shared evalsClaude Sonnet 4.6 vs Kimi K2.527 shared evalsClaude Opus 4.5 vs GPT-5 Nano26 shared evalsClaude 4 Sonnet vs Claude Opus 4.526 shared evalsClaude Opus 4.5 vs Kimi K2.526 shared evalsClaude Sonnet 4.6 vs Qwen3.6 Plus26 shared evalsClaude Opus 4.5 vs GPT-5.525 shared evalsClaude Opus 4.5 vs GLM 4.725 shared evalsClaude Opus 4.5 vs GPT-5.4 Mini25 shared evalsClaude Sonnet 4.6 vs GLM 5.125 shared evalsClaude Sonnet 4.5 vs Claude Sonnet 4.624 shared evalsClaude Sonnet 4.6 vs GPT-5.224 shared evalsClaude Opus 4.5 vs Claude Opus 4.824 shared evalsClaude Opus 4.5 vs Claude Opus 4.724 shared evalsClaude Opus 4.5 vs Gemini 2.5 Pro24 shared evalsClaude Sonnet 4.6 vs GPT-5 Mini23 shared evalsClaude Opus 4.5 vs GPT-523 shared evalsClaude Fable 5 vs Claude Opus 4.523 shared evalsClaude Opus 4.5 vs GLM 5.123 shared evalsClaude Sonnet 4.6 vs DeepSeek V3.223 shared evalsClaude Opus 4.5 vs Qwen3.6 Plus22 shared evalsClaude Sonnet 4.6 vs Grok 4.1 Fast22 shared evalsClaude Opus 4.5 vs gpt-oss-120b21 shared evalsClaude Sonnet 4.6 vs GPT-5 Nano20 shared evalsClaude 4 Sonnet vs Claude Sonnet 4.620 shared evalsClaude Sonnet 4.6 vs Gemini 2.5 Pro19 shared evalsClaude Sonnet 4.6 vs GLM 4.719 shared evalsClaude Opus 4.5 vs GPT-4o18 shared evalsClaude Sonnet 4.6 vs gpt-oss-120b18 shared evalsClaude Opus 4.5 vs GPT-4.1 Mini16 shared evalsClaude Sonnet 4.6 vs GPT-516 shared evalsClaude Opus 4.5 vs GPT-4.116 shared evalsClaude Opus 4.5 vs GPT-4o-mini15 shared evalsClaude Opus 4.5 vs GPT-4.1 Nano15 shared evalsClaude Sonnet 4.6 vs GPT-4o14 shared evalsClaude Sonnet 4.6 vs GPT-6 Astra13 shared evalsClaude Sonnet 4.6 vs GPT-4.1 Mini12 shared evalsClaude Sonnet 4.6 vs GPT-4.112 shared evalsClaude Sonnet 4.6 vs GPT-4o-mini12 shared evalsClaude Sonnet 4.6 vs GPT-4.1 Nano12 shared evalsClaude Opus 4.5 vs GPT-6 Astra11 shared evals
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