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 | 91.3% | 61.3% | 1687elo | 73.1 | 84.7% | 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% | 45.0% | 49.5% | 79.2% | 74.3% | 47.0% | 89.5% | - | - | 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% | - | - | 64.8% |
| Claude 4 Sonnet Anthropic | 74.3% | 54.7% | 1483elo | 58.4 | 67.5% | 77.7% | 10.7% | 54.7% | 64.8% | 77.5% | 54.6% | 44.3% | 72.9% | 70.5% | 69.0% | 65.5% | 33.9% | 72.4% | 84.2% | 62.5% | 35.0% | 40.0% | 74.6% | 69.6% | 31.1% | 64.6% | 77.3% | 22.9% | - | 47.8% | - | - | 19.8% | - | - | - | - | 99.1% | 86.7% | - | - | 43.9% | - | - | 6.18 | 6.18 | - | 58.3% | - | 35.6% | - | 0.59 | - | 84.0% | 84.0% | 59.6% |
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 | - | $5.00 |
| Output $/1M | - | $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 26 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 77.7% and Claude Opus 4.5 scores 86.6% on GPQA Diamond.
- 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.
Other head-to-heads
56Claude Opus 4.5 vs GPT-5.235 shared evalsClaude Opus 4.5 vs Claude Sonnet 4.534 shared evalsClaude Opus 4.5 vs GPT-5 Mini31 shared evalsClaude 4 Sonnet vs GPT-5 Mini29 shared evalsClaude Opus 4.5 vs Grok 4.1 Fast29 shared evalsClaude 4 Sonnet vs Claude Sonnet 4.528 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 evalsClaude Opus 4.5 vs GPT-5 Nano26 shared evalsClaude Opus 4.5 vs Kimi K2.526 shared evalsClaude 4 Sonnet vs GPT-525 shared evalsClaude Opus 4.5 vs GPT-5.525 shared evalsClaude 4 Sonnet vs GPT-5 Nano25 shared evalsClaude 4 Sonnet vs GPT-5.225 shared evalsClaude Opus 4.5 vs GLM 4.725 shared evalsClaude Opus 4.5 vs GPT-5.4 Mini25 shared evalsClaude 4 Sonnet vs Gemini 2.5 Pro25 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 4 Sonnet vs Grok 4.1 Fast24 shared evalsClaude Opus 4.5 vs GPT-523 shared evalsClaude 4 Sonnet vs GPT-5.523 shared evalsClaude 4 Sonnet vs Gemini 3.1 Pro Preview23 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 evalsClaude 4 Sonnet vs Kimi K2.523 shared evalsClaude 4 Sonnet vs Claude Opus 4.822 shared evalsClaude Opus 4.5 vs Qwen3.6 Plus22 shared evalsClaude 4 Sonnet vs Claude Fable 522 shared evalsClaude 4 Sonnet vs Claude Opus 4.622 shared evalsClaude 4 Sonnet vs GPT-5.422 shared evalsClaude 4 Sonnet vs GLM 4.722 shared evalsClaude Opus 4.5 vs gpt-oss-120b21 shared evalsClaude 4 Sonnet vs Claude Opus 4.721 shared evalsClaude 4 Sonnet vs DeepSeek V3.221 shared evalsClaude 4 Sonnet vs gpt-oss-120b21 shared evalsClaude 4 Sonnet vs Claude Sonnet 4.620 shared evalsClaude 4 Sonnet vs GLM 5.120 shared evalsClaude 4 Sonnet vs GPT-4o20 shared evalsClaude 4 Sonnet vs GPT-4.1 Mini19 shared evalsClaude 4 Sonnet vs GPT-4.119 shared evalsClaude 4 Sonnet vs Qwen3.6 Plus19 shared evalsClaude 4 Sonnet vs GPT-5.4 Mini19 shared evalsClaude Opus 4.5 vs GPT-4o18 shared evalsClaude 4 Sonnet vs GPT-4o-mini18 shared evalsClaude Opus 4.5 vs GPT-4.1 Mini16 shared evalsClaude Opus 4.5 vs GPT-4.116 shared evalsClaude 4 Sonnet vs GPT-4.1 Nano16 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 evalsClaude 4 Sonnet vs GPT-6 Astra8 shared evals
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