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 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% | 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 | - | - | 72.1% | - | - | - | - | - | 76.3 | 50.6% | 60.6% | 62.8% |
| Claude Opus 4.5 Anthropic | 61.3% | 1683elo | 73.1 | 20.7% | 81.0% | 13.2% | 43.0% | 83.5% | 78.1% | 79.7% | 74.4% | 62.5% | 81.3% | 90.4% | 80.1% | 68.7% | 36.0% | 45.0% | 47.0% | 74.3% | 40.9% | 20.6% | 86.3% | - | 62.7% | - | - | 16.7% | - | - | 35.6% | 6.1% | - | - | 84.7% | 12.13 | 83.8% | 73.8% | 45.2% | 83.2% | 88.9% | - | 100.0% | 37.4 | - | 77.5% | 45.3 | 70.7% | 79.2% | 61.8 | - | - | - | 62.2% |
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 | 45 tok/s |
| Latency | 0.00 s | 1.12 s |
| Modalities | file, image, text | text, image, file |
| Providers | - | - |
| Publisher | Anthropic | Anthropic |
| Reported scores | 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 Opus 4.5 or Claude Sonnet 4.6 better?
- Across the 23 benchmarks both models report on Sophon, Claude Sonnet 4.6 leads on 15 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 81.0% and Claude Sonnet 4.6 scores 79.7% 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.
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