Claude Sonnet 4.6 vs GPT-5 Nano
Head to head on 20 shared benchmarks, with price, context window, and release dates.
Benchmark scores
64evals · sort by any column, ⤢ to expand fullscreen
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| Claude Sonnet 4.6 Anthropic | 1805elo | 79.9 | 32.4% | 79.7% | 11.2% | 42.4% | 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% | 78.9% | 87.1% | - | - | 47.2% | 47.6% | - | - | - | 1.35 | 65.3% | 78.0% | - | 1207elo | 51.0% | - | - | - | 92.2% | - | - | - | - | - | - | - | - | - | 89.3 | - | - | 72.1% | - | - | - | 76.3 | - | 50.6% | 60.6% | - | - | 51.5% | - | - | - | 62.8% |
| GPT-5 Nano OpenAI | 703elo | 28 | 8.3% | 42.8% | 4.0% | 32.5% | 52.8% | 62.4% | 43.4% | 55.7% | 46.8% | 68.4% | 40.3% | 53.6% | 12.0% | 30.4% | 29.1% | 67.4% | 6.8% | 25.7% | - | 0.0% | 27.3% | - | - | 0.25 | 0.21 | 6.7% | - | - | - | 10.0% | - | - | 78.2% | 1.18 | 100.0% | - | 47.0% | 1.38 | 1.38 | 100.0% | 100.0% | 26.7% | 30.4% | 72.9% | 55.6% | - | 100.0% | 0.0% | - | 0.0% | 1.72 | 34.8% | - | 29.7% | - | - | 20.41 | -6.67 | - | 82.0% | 82.0% | 40.0% | 43.7% |
2 / 2 models
| Attribute | Claude Sonnet 4.6 Anthropic | GPT-5 Nano OpenAI |
|---|---|---|
| Description | Claude Sonnet 4.6 is an AI model from Anthropic. | GPT-5 nano is an AI model from OpenAI. |
| Family | Claude | GPT |
| Params | - | - |
| Open weights | closed | closed |
| License | proprietary | proprietary |
| Released | 17 Feb 2026 | 7 Aug 2025 |
| Context | 1,000,000 | 400,000 |
| Input $/1M | $3.00 | $0.05 |
| Output $/1M | $15.00 | $0.40 |
| Cache read $/1M | $0.300 | $0.005 |
| Cache write $/1M | $3.750 | - |
| Speed | 45 tok/s | 0 tok/s |
| Latency | 1.12 s | 0.00 s |
| Modalities | text, image, file | text, image, file |
| Providers | - | - |
| Publisher | Anthropic | OpenAI |
| 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 Sonnet 4.6 or GPT-5 Nano better?
- Across the 20 benchmarks both models report on Sophon, Claude Sonnet 4.6 leads on 20 of them. Which one is "better" depends on the benchmark - the table above shows every shared score.
- How do Claude Sonnet 4.6 and GPT-5 Nano compare on GPQA Diamond?
- Claude Sonnet 4.6 scores 79.7% and GPT-5 Nano scores 42.8% on GPQA Diamond.
- Which is cheaper, Claude Sonnet 4.6 or GPT-5 Nano?
- GPT-5 Nano is cheaper at $0.40 per million output tokens against $15.00 for Claude Sonnet 4.6 - about 37.5x.
- When were Claude Sonnet 4.6 and GPT-5 Nano released?
- Claude Sonnet 4.6 was released 17 Feb 2026 by Anthropic. GPT-5 Nano was released 7 Aug 2025 by OpenAI.
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