Claude Sonnet 4.5 vs Claude Sonnet 4.6
Head to head on 24 shared benchmarks, with price, context window, and release dates.
Benchmark scores
93evals · sort by any column, ⤢ to expand fullscreen
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| 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% | 72.1% | 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 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 76.3 | - | 50.6% | 60.6% | - | - | 64.7% |
| Claude Sonnet 4.5 Anthropic | 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% | 64.0% | 62.9% | 19.0% | 32.9% | 45.7% | 73.3% | 35.6% | 22.6% | 78.1% | 0.0% | - | 0.0% | 88.0% | 100 | 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 | 40.6% | 84.5% | 0 | 87.5% | - | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0 | 0.0% | 0.0% | 77.2% | 67.0% | 74.8% | 0.0% | 0 | 0 | 50.34 | - | 0 | - | - | 0.0% | 1.49 | 29.2% |
2 / 2 models
| Attribute | Claude Sonnet 4.5 Anthropic | Claude Sonnet 4.6 Anthropic |
|---|---|---|
| Description | anthropic/claude-sonnet-4.5 is an AI model. | Claude Sonnet 4.6 is an AI model from Anthropic. |
| Family | Claude | Claude |
| Params | Undisclosed (closed) | - |
| Open weights | closed | closed |
| License | proprietary | proprietary |
| Released | 29 Sep 2025 | 17 Feb 2026 |
| Context | 1,000,000 | 1,000,000 |
| Input $/1M | $3.00 | $3.00 |
| Output $/1M | $15.00 | $15.00 |
| Cache read $/1M | $0.300 | $0.300 |
| Cache write $/1M | $3.750 | $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 | TaxEval v273.3% LiveBench - Math79.3% (LiveBench) LiveBench - Coding80.4% (LiveBench) LiveBench - Language76.5% (LiveBench) LiveBench - Data Analysis57.0% (LiveBench) |
FAQ
- Is Claude Sonnet 4.5 or Claude Sonnet 4.6 better?
- Across the 24 benchmarks both models report on Sophon, Claude Sonnet 4.6 leads on 21 of them. Which one is "better" depends on the benchmark - the table above shows every shared score.
- How do Claude Sonnet 4.5 and Claude Sonnet 4.6 compare on GPQA Diamond?
- Claude Sonnet 4.5 scores 83.4% and Claude Sonnet 4.6 scores 87.5% on GPQA Diamond.
- When were Claude Sonnet 4.5 and Claude Sonnet 4.6 released?
- Claude Sonnet 4.5 was released 29 Sep 2025 by Anthropic. Claude Sonnet 4.6 was released 17 Feb 2026 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 Sonnet 4.5 vs GPT-5.232 shared evalsClaude Sonnet 4.6 vs Gemini 3.1 Pro Preview32 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 Sonnet 4.6 vs GPT-5.530 shared evalsClaude Opus 4.8 vs Claude Sonnet 4.629 shared evalsClaude Opus 4.7 vs Claude Sonnet 4.629 shared evalsClaude 4 Sonnet vs Claude Sonnet 4.528 shared evalsClaude Opus 4.6 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 Fable 5 vs Claude Sonnet 4.628 shared evalsClaude Opus 4.6 vs Claude Sonnet 4.628 shared evalsClaude Sonnet 4.6 vs GPT-5.428 shared evalsClaude Sonnet 4.6 vs GPT-5.4 Mini28 shared evalsClaude Sonnet 4.5 vs Gemini 3.1 Pro Preview27 shared evalsClaude Sonnet 4.5 vs DeepSeek V3.227 shared evalsClaude Sonnet 4.6 vs Kimi K2.527 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 Sonnet 4.6 vs Qwen3.6 Plus26 shared evalsClaude Opus 4.8 vs Claude Sonnet 4.525 shared evalsClaude Sonnet 4.5 vs GLM 4.725 shared evalsClaude Sonnet 4.6 vs GLM 5.125 shared evalsClaude Fable 5 vs Claude Sonnet 4.524 shared evalsClaude Opus 4.7 vs Claude Sonnet 4.524 shared evalsClaude Sonnet 4.6 vs GPT-5.224 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 Sonnet 4.6 vs GPT-5 Mini23 shared evalsClaude Opus 4.5 vs Claude Sonnet 4.623 shared evalsClaude Sonnet 4.6 vs DeepSeek V3.223 shared evalsClaude Sonnet 4.5 vs Qwen3.6 Plus22 shared evalsClaude Sonnet 4.6 vs Grok 4.1 Fast22 shared evalsClaude Sonnet 4.5 vs GPT-4o21 shared evalsClaude Sonnet 4.6 vs GPT-5 Nano20 shared evalsClaude 4 Sonnet vs Claude Sonnet 4.620 shared evalsClaude Sonnet 4.5 vs GPT-4.119 shared evalsClaude Sonnet 4.6 vs Gemini 2.5 Pro19 shared evalsClaude Sonnet 4.6 vs GLM 4.719 shared evalsClaude Sonnet 4.6 vs gpt-oss-120b18 shared evalsClaude Sonnet 4.5 vs GPT-4o-mini17 shared evalsClaude Sonnet 4.5 vs GPT-4.1 Nano16 shared evalsClaude Sonnet 4.6 vs GPT-516 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 Sonnet 4.5 vs GPT-6 Astra11 shared evals
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