Claude 4 Sonnet vs Claude Sonnet 4.5
Head to head on 28 shared benchmarks, with price, context window, and release dates.
Benchmark scores
94evals · sort by any column, ⤢ to expand fullscreen
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| Claude 4 Sonnet Anthropic | 38.0% | 54.7% | 1480elo | 58.4 | 67.5% | 68.3% | 4.3% | 45.4% | 64.8% | 77.5% | 54.6% | 44.3% | 72.9% | 70.5% | 69.0% | 44.9% | 93.4% | 33.9% | 72.4% | 83.7% | 62.5% | 43.9% | 35.0% | 37.3% | 74.6% | 69.6% | 27.3% | 52.3% | - | - | 40.7% | - | - | - | - | - | 22.9% | 47.8% | - | - | - | 19.8% | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 86.7% | - | - | - | - | - | - | - | - | - | - | 6.18 | 6.18 | - | - | - | - | - | 58.3% | - | 35.6% | - | - | - | - | - | 0.59 | - | - | 84.0% | 84.0% | - | 55.5% |
| Claude Sonnet 4.5 Anthropic | 37.0% | 60.8% | 1675elo | 71.4 | 83.9% | 72.7% | 7.2% | 42.7% | 70.7% | 80.4% | 57.0% | 53.4% | 76.5% | 79.3% | 77.6% | 59.0% | 0.0% | 40.6% | 84.5% | 86.0% | 64.0% | 62.9% | 32.9% | 42.8% | 74.8% | 73.3% | 28.8% | 70.5% | 0.0% | 0.0% | - | 100 | 0.0% | 0.0% | 0.0% | 5.0% | - | - | 0.0% | 0.0% | 0.0% | - | 0.0% | 0.0% | 0.0% | 0.0% | 15.2% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 87.5% | 83.8% | 0.0% | 0.0% | 0.75 | 0.75 | 0 | 0 | - | 0.0% | 0.0% | 0.0% | 0.0% | 19.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | - | - | 0.0% | 0 | 0.0% | 0.0% | 77.2% | - | 67.0% | - | 0.0% | 0 | 0 | 50.34 | 0 | - | 22.6% | 0.0% | - | - | 1.49 | 27.5% |
2 / 2 models
| Attribute | Claude 4 Sonnet Anthropic | Claude Sonnet 4.5 Anthropic |
|---|---|---|
| Description | Claude 4 Sonnet 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 | 22 May 2025 | 29 Sep 2025 |
| Context | 200,000 | 1,000,000 |
| Input $/1M | $3.00 | $3.00 |
| Output $/1M | $15.00 | $15.00 |
| Cache read $/1M | - | $0.300 |
| Cache write $/1M | - | $3.750 |
| Speed | 0 tok/s | 0 tok/s |
| Latency | 0.00 s | 0.00 s |
| Modalities | text, image | 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 4 Sonnet or Claude Sonnet 4.5 better?
- Across the 28 benchmarks both models report on Sophon, Claude Sonnet 4.5 leads on 24 of them. Which one is "better" depends on the benchmark - the table above shows every shared score.
- How do Claude 4 Sonnet and Claude Sonnet 4.5 compare on GPQA Diamond?
- Claude 4 Sonnet scores 68.3% and Claude Sonnet 4.5 scores 72.7% on GPQA Diamond.
- When were Claude 4 Sonnet and Claude Sonnet 4.5 released?
- Claude 4 Sonnet was released 22 May 2025 by Anthropic. Claude Sonnet 4.5 was released 29 Sep 2025 by Anthropic.
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