Claude 4 Sonnet vs Claude Opus 4.5
Head to head on 26 shared benchmarks, with price, context window, and release dates.
Benchmark scores
55evals · sort by any column, ⤢ to expand fullscreen
| Model | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Claude Opus 4.5 Anthropic | 62.7% | 61.3% | 1683elo | 73.1 | 84.7% | 81.0% | 13.2% | 43.0% | 78.1% | 79.7% | 74.4% | 62.5% | 81.3% | 90.4% | 80.1% | 73.8% | 45.2% | 83.2% | 88.9% | 68.7% | 45.0% | 47.0% | 79.2% | 74.3% | 40.9% | 86.3% | - | - | 16.7% | - | 35.6% | 6.1% | - | 20.7% | 12.13 | 83.8% | 83.5% | - | - | 100.0% | 37.4 | - | 36.0% | 77.5% | - | - | 45.3 | - | 70.7% | - | 61.8 | - | 20.6% | - | - | 62.2% |
| 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% | 33.9% | 72.4% | 83.7% | 62.5% | 35.0% | 37.3% | 74.6% | 69.6% | 27.3% | 52.3% | 40.7% | 22.9% | - | 47.8% | - | - | 19.8% | - | - | - | - | 93.4% | 86.7% | - | - | 43.9% | - | - | 6.18 | 6.18 | - | 58.3% | - | 35.6% | - | 0.59 | - | 84.0% | 84.0% | 55.5% |
2 / 2 models
| Attribute | Claude 4 Sonnet Anthropic | Claude Opus 4.5 Anthropic |
|---|---|---|
| Description | Claude 4 Sonnet is an AI model from Anthropic. | Claude Opus 4.5 is an AI model from Anthropic. |
| Family | Claude | Claude |
| Params | - | - |
| Open weights | closed | closed |
| License | proprietary | proprietary |
| Released | 22 May 2025 | 24 Nov 2025 |
| Context | 200,000 | 200,000 |
| Input $/1M | $3.00 | $5.00 |
| Output $/1M | $15.00 | $25.00 |
| Cache read $/1M | - | $0.500 |
| Cache write $/1M | - | $6.250 |
| Speed | 0 tok/s | 0 tok/s |
| Latency | 0.00 s | 0.00 s |
| Modalities | text, image | file, image, text |
| Providers | - | - |
| Publisher | Anthropic | Anthropic |
| Reported scores |
FAQ
- Is Claude 4 Sonnet or Claude Opus 4.5 better?
- Across the 26 benchmarks both models report on Sophon, Claude Opus 4.5 leads on 25 of them. Which one is "better" depends on the benchmark - the table above shows every shared score.
- How do Claude 4 Sonnet and Claude Opus 4.5 compare on GPQA Diamond?
- Claude 4 Sonnet scores 68.3% and Claude Opus 4.5 scores 81.0% on GPQA Diamond.
- Which is cheaper, Claude 4 Sonnet or Claude Opus 4.5?
- Claude 4 Sonnet is cheaper at $15.00 per million output tokens against $25.00 for Claude Opus 4.5 - about 1.7x.
- When were Claude 4 Sonnet and Claude Opus 4.5 released?
- Claude 4 Sonnet was released 22 May 2025 by Anthropic. Claude Opus 4.5 was released 24 Nov 2025 by Anthropic.
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