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% | 1805elo | 79.9 | 32.4% | 79.7% | 11.2% | 42.4% | 92.2% | 78.4% | 80.0% | 76.1% | 63.9% | 77.7% | 86.5% | 86.4% | 67.7% | 72.1% | 45.0% | 46.6% | 44.1% | 77.1% | 42.4% | 51.5% | 78.9% | - | 87.1% | - | - | - | - | 47.2% | - | - | 47.6% | - | - | 1.35 | - | - | 78.0% | - | - | 1207elo | - | - | 51.0% | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 89.3 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 76.3 | - | 50.6% | 60.6% | - | - | 62.8% |
| Claude Sonnet 4.5 Anthropic | 60.8% | 1675elo | 71.4 | 15.2% | 72.7% | 7.2% | 42.7% | 83.8% | 70.7% | 80.4% | 57.0% | 53.4% | 76.5% | 79.3% | 77.6% | 64.0% | 62.9% | 19.0% | 32.9% | 42.8% | 73.3% | 28.8% | 22.6% | 70.5% | 0.0% | - | 0.0% | 37.0% | 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% | 59.0% | 0.75 | 0.75 | 0.0% | 0 | 40.6% | 84.5% | 0 | 86.0% | - | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0 | 0.0% | 0.0% | 77.2% | 67.0% | 74.8% | 0.0% | 0 | 0 | 50.34 | - | 0 | - | - | 0.0% | 1.49 | 27.5% |
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 | 45 tok/s |
| Latency | 0.00 s | 1.12 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) | GPQA Diamond79.7% (AA) Humanity's Last Exam (HLE)11.2% (AA) IFBench42.4% (AA) SciCode44.1% (AA) τ²-bench (Tau²-bench)78.9% (AA) |
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 22 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 72.7% and Claude Sonnet 4.6 scores 79.7% 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.
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