Claude 3.5 Sonnet vs GPT-5 Nano
Head to head on 17 shared benchmarks, with price, context window, and release dates.
Benchmark scores
62evals · sort by any column, ⤢ to expand fullscreen
| Model | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| GPT-5 Nano OpenAI | 85.0% | 10.0% | 703elo | 28 | 8.3% | 69.4% | 9.5% | 52.8% | 62.4% | 55.7% | 46.8% | 78.9% | 78.0% | 53.6% | 36.6% | 34.8% | 67.4% | 0.0% | - | - | - | - | 0.25 | 0.21 | 6.7% | - | 78.2% | 1.18 | - | 100.0% | 67.6% | - | 43.4% | 68.4% | 40.3% | 1.38 | 1.38 | 100.0% | 100.0% | - | 26.7% | 30.4% | 72.9% | 100.0% | 0.0% | 0.0% | 12.0% | - | 30.4% | 1.72 | - | - | 12.1% | 29.7% | - | 20.41 | -6.67 | 82.0% | 82.0% | 40.0% | - | 36.5% | 48.9% |
| Claude 3.5 Sonnet Anthropic | 3.3% | 28.0% | 1451elo | 58.4 | 2.1% | 55.3% | 4.1% | 63.7% | 65.6% | 69.2% | 56.4% | 38.1% | 77.2% | 64.1% | 36.6% | 63.4% | 70.2% | - | 51.6% | 15.7% | 52.4% | 24.2% | - | - | - | 53.6% | - | - | 96.4 | - | - | 0.0% | - | - | - | - | - | - | - | 77.1% | - | - | - | - | - | - | - | 0.0% | - | - | 51.3% | 25.3% | - | - | 0.98 | - | - | - | - | - | 62.6% | - | 42.7% |
2 / 2 models
| Attribute | Claude 3.5 Sonnet Anthropic | GPT-5 Nano OpenAI |
|---|---|---|
| Description | Claude Sonnet 3.5 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 | 22 Oct 2024 | 7 Aug 2025 |
| Context | 200,000 | 400,000 |
| Input $/1M | $3.00 | $0.05 |
| Output $/1M | $15.00 | $0.40 |
| Cache read $/1M | - | $0.005 |
| Cache write $/1M | - | - |
| Speed | 0 tok/s | 0 tok/s |
| Latency | 0.00 s | 0.00 s |
| Modalities | text, image | text, image, file |
| Providers | - | - |
| Publisher | Anthropic | OpenAI |
| Reported scores | MortgageTax64.1% Traveling Salesman0.98 (3 samples) SWE-bench Verified63.4% (SWE-bench) SWE-bench Lite51.3% (SWE-bench) SWE-bench Multimodal25.3% (SWE-bench) |
FAQ
- Is Claude 3.5 Sonnet or GPT-5 Nano better?
- Across the 17 benchmarks both models report on Sophon, Claude 3.5 Sonnet leads on 10 of them. Which one is "better" depends on the benchmark - the table above shows every shared score.
- How do Claude 3.5 Sonnet and GPT-5 Nano compare on GPQA Diamond?
- Claude 3.5 Sonnet scores 55.3% and GPT-5 Nano scores 69.4% on GPQA Diamond.
- Which is cheaper, Claude 3.5 Sonnet or GPT-5 Nano?
- GPT-5 Nano is cheaper at $0.40 per million output tokens against $15.00 for Claude 3.5 Sonnet - about 37.5x.
- When were Claude 3.5 Sonnet and GPT-5 Nano released?
- Claude 3.5 Sonnet was released 22 Oct 2024 by Anthropic. GPT-5 Nano was released 7 Aug 2025 by OpenAI.
Other head-to-heads
56GPT-5 Mini vs GPT-5 Nano38 shared evalsClaude Sonnet 4.5 vs GPT-5 Nano31 shared evalsGPT-5 vs GPT-5 Nano28 shared evalsGPT-4.1 Mini vs GPT-5 Nano26 shared evalsGPT-5 Nano vs GPT-5.226 shared evalsClaude Opus 4.5 vs GPT-5 Nano26 shared evalsClaude 4 Sonnet vs GPT-5 Nano25 shared evalsGemini 2.5 Pro vs GPT-5 Nano24 shared evalsGPT-5 Nano vs Grok 4.1 Fast24 shared evalsGPT-5 Nano vs GPT-5.523 shared evalsClaude Opus 4.6 vs GPT-5 Nano23 shared evalsGPT-5 Nano vs Kimi K2.523 shared evalsGLM 4.7 vs GPT-5 Nano23 shared evalsGemini 3.1 Pro Preview vs GPT-5 Nano22 shared evalsClaude Opus 4.8 vs GPT-5 Nano22 shared evalsGPT-5 Nano vs GPT-5.422 shared evalsClaude Opus 4.7 vs GPT-5 Nano22 shared evalsGPT-4.1 Nano vs GPT-5 Nano22 shared evalsDeepSeek V3.2 vs GPT-5 Nano22 shared evalsGPT-5 Nano vs gpt-oss-120b22 shared evalsClaude 3.5 Sonnet vs GPT-4o22 shared evalsClaude Fable 5 vs GPT-5 Nano21 shared evalsGLM 5.1 vs GPT-5 Nano21 shared evalsClaude 3.5 Sonnet vs Claude 4 Sonnet21 shared evalsClaude 3.5 Sonnet vs Gemini 2.5 Pro21 shared evalsGPT-4.1 vs GPT-5 Nano20 shared evalsClaude Sonnet 4.6 vs GPT-5 Nano20 shared evalsClaude 3.5 Sonnet vs Claude Sonnet 4.519 shared evalsClaude 3.5 Sonnet vs GPT-5 Mini19 shared evalsGPT-5 Nano vs Qwen3.6 Plus19 shared evalsClaude 3.5 Sonnet vs GPT-4o-mini19 shared evalsGPT-4o vs GPT-5 Nano18 shared evalsClaude 3.5 Sonnet vs GPT-4.118 shared evalsClaude 3.5 Sonnet vs GPT-4.1 Mini17 shared evalsClaude 3.5 Sonnet vs GPT-517 shared evalsClaude 3.5 Sonnet vs GPT-5.217 shared evalsClaude 3.5 Sonnet vs Claude Opus 4.517 shared evalsClaude 3.5 Sonnet vs DeepSeek V3.217 shared evalsGPT-4o-mini vs GPT-5 Nano16 shared evalsClaude 3.5 Sonnet vs GPT-4.1 Nano16 shared evalsClaude 3.5 Sonnet vs gpt-oss-120b16 shared evalsClaude 3.5 Sonnet vs Kimi K2.515 shared evalsClaude 3.5 Sonnet vs Grok 4.1 Fast15 shared evalsClaude 3.5 Sonnet vs GLM 4.715 shared evalsClaude 3.5 Sonnet vs GPT-5.514 shared evalsClaude 3.5 Sonnet vs Claude Opus 4.614 shared evalsClaude 3.5 Sonnet vs Gemini 3.1 Pro Preview13 shared evalsClaude 3.5 Sonnet vs Claude Opus 4.813 shared evalsClaude 3.5 Sonnet vs GPT-5.413 shared evalsClaude 3.5 Sonnet vs GLM 5.113 shared evalsClaude 3.5 Sonnet vs Claude Sonnet 4.613 shared evalsClaude 3.5 Sonnet vs Claude Opus 4.713 shared evalsClaude 3.5 Sonnet vs Claude Fable 512 shared evalsClaude 3.5 Sonnet vs Qwen3.6 Plus11 shared evalsGPT-5 Nano vs GPT-6 Astra10 shared evalsClaude 3.5 Sonnet vs GPT-6 Astra6 shared evals
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