Claude Opus 4.5 vs GPT-5 Nano
Head to head on 26 shared benchmarks, with price, context window, and release dates.
Benchmark scores
64evals · sort by any column, ⤢ to expand fullscreen
| Model | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Claude Opus 4.5 Anthropic | 91.3% | 1687elo | 73.1 | 20.7% | 86.6% | 30.1% | 58.0% | 78.1% | 79.7% | 74.4% | 62.5% | 81.3% | 90.4% | 80.1% | 87.1% | 45.2% | 83.2% | 89.5% | 68.7% | 36.0% | 45.0% | 49.5% | 79.2% | 74.3% | 47.0% | 89.5% | - | - | - | 16.7% | - | 61.3% | 35.6% | 6.1% | - | - | - | 84.7% | - | 12.13 | 83.8% | 83.5% | - | - | - | - | - | - | - | 100.0% | 37.4 | - | 77.5% | 45.3 | - | 70.7% | 61.8 | - | - | - | 20.6% | - | - | - | 64.8% |
| GPT-5 Nano OpenAI | 83.7% | 705elo | 28 | 8.3% | 67.6% | 9.5% | 67.6% | 52.8% | 62.4% | 43.4% | 55.7% | 46.8% | 68.4% | 40.3% | 78.9% | 30.4% | 72.9% | 78.0% | 53.6% | 12.0% | 30.4% | 36.6% | 34.8% | 67.4% | 12.1% | 36.5% | 0.0% | 0.25 | 0.21 | - | 6.7% | - | - | - | 10.0% | 78.2% | 1.18 | - | 100.0% | - | - | - | 1.38 | 1.38 | 100.0% | 100.0% | 26.7% | 100.0% | 0.0% | - | - | 0.0% | - | - | 1.72 | - | - | 29.7% | 20.41 | -6.67 | - | 82.0% | 82.0% | 40.0% | 48.9% |
2 / 2 models
| Attribute | Claude Opus 4.5 Anthropic | GPT-5 Nano OpenAI |
|---|---|---|
| Description | Claude Opus 4.5 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 | 24 Nov 2025 | 7 Aug 2025 |
| Context | 200,000 | 400,000 |
| Input $/1M | $5.00 | $0.05 |
| Output $/1M | $25.00 | $0.40 |
| Cache read $/1M | $0.500 | $0.005 |
| Cache write $/1M | $6.250 | - |
| Speed | 0 tok/s | 0 tok/s |
| Latency | 0.00 s | 0.00 s |
| Modalities | file, image, text | text, image, file |
| Providers | - | - |
| Publisher | Anthropic | OpenAI |
| Reported scores |
FAQ
- Is Claude Opus 4.5 or GPT-5 Nano 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 Opus 4.5 and GPT-5 Nano compare on GPQA Diamond?
- Claude Opus 4.5 scores 86.6% and GPT-5 Nano scores 67.6% on GPQA Diamond.
- Which is cheaper, Claude Opus 4.5 or GPT-5 Nano?
- GPT-5 Nano is cheaper at $0.40 per million output tokens against $25.00 for Claude Opus 4.5 - about 62.5x.
- When were Claude Opus 4.5 and GPT-5 Nano released?
- Claude Opus 4.5 was released 24 Nov 2025 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 Opus 4.5 vs GPT-5.235 shared evalsClaude Opus 4.5 vs Claude Sonnet 4.534 shared evalsClaude Sonnet 4.5 vs GPT-5 Nano31 shared evalsClaude Opus 4.5 vs GPT-5 Mini31 shared evalsClaude Opus 4.5 vs Grok 4.1 Fast29 shared evalsGPT-5 vs GPT-5 Nano28 shared evalsClaude Opus 4.5 vs Gemini 3.1 Pro Preview28 shared evalsClaude Opus 4.5 vs Claude Opus 4.628 shared evalsClaude Opus 4.5 vs GPT-5.428 shared evalsClaude Opus 4.5 vs DeepSeek V3.227 shared evalsGPT-4.1 Mini vs GPT-5 Nano26 shared evalsGPT-5 Nano vs GPT-5.226 shared evalsClaude 4 Sonnet vs Claude Opus 4.526 shared evalsClaude Opus 4.5 vs Kimi K2.526 shared evalsClaude Opus 4.5 vs GPT-5.525 shared evalsClaude 4 Sonnet vs GPT-5 Nano25 shared evalsClaude Opus 4.5 vs GLM 4.725 shared evalsClaude Opus 4.5 vs GPT-5.4 Mini25 shared evalsGemini 2.5 Pro vs GPT-5 Nano24 shared evalsGPT-5 Nano vs Grok 4.1 Fast24 shared evalsClaude Opus 4.5 vs Claude Opus 4.824 shared evalsClaude Opus 4.5 vs Claude Opus 4.724 shared evalsClaude Opus 4.5 vs Gemini 2.5 Pro24 shared evalsClaude Opus 4.5 vs GPT-523 shared evalsGPT-5 Nano vs GPT-5.523 shared evalsClaude Opus 4.6 vs GPT-5 Nano23 shared evalsGLM 4.7 vs GPT-5 Nano23 shared evalsClaude Fable 5 vs Claude Opus 4.523 shared evalsClaude Opus 4.5 vs Claude Sonnet 4.623 shared evalsClaude Opus 4.5 vs GLM 5.123 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 evalsGPT-5 Nano vs Kimi K2.522 shared evalsClaude Opus 4.7 vs GPT-5 Nano22 shared evalsDeepSeek V3.2 vs GPT-5 Nano22 shared evalsGPT-4.1 Nano vs GPT-5 Nano22 shared evalsGPT-5 Nano vs gpt-oss-120b22 shared evalsClaude Opus 4.5 vs Qwen3.6 Plus22 shared evalsClaude Fable 5 vs GPT-5 Nano21 shared evalsGLM 5.1 vs GPT-5 Nano21 shared evalsClaude Opus 4.5 vs gpt-oss-120b21 shared evalsGPT-4.1 vs GPT-5 Nano20 shared evalsClaude Sonnet 4.6 vs GPT-5 Nano20 shared evalsGPT-5.4 Mini vs GPT-5 Nano20 shared evalsGPT-5 Nano vs Qwen3.6 Plus19 shared evalsGPT-4o vs GPT-5 Nano18 shared evalsClaude Opus 4.5 vs GPT-4o18 shared evalsClaude Opus 4.5 vs GPT-4.1 Mini16 shared evalsGPT-4o-mini vs GPT-5 Nano16 shared evalsClaude Opus 4.5 vs GPT-4.116 shared evalsClaude Opus 4.5 vs GPT-4o-mini15 shared evalsClaude Opus 4.5 vs GPT-4.1 Nano15 shared evalsClaude Opus 4.5 vs GPT-6 Astra11 shared evalsGPT-5 Nano vs GPT-6 Astra10 shared evals
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