Claude Opus 4.5 vs Claude Sonnet 4.5
Head to head on 34 shared benchmarks, with price, context window, and release dates.
Benchmark scores
89evals · sort by any column, ⤢ to expand fullscreen
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| Claude Opus 4.5 Anthropic | 91.3% | 61.3% | 1687elo | 73.1 | 20.7% | 84.7% | 86.6% | 30.1% | 83.8% | 58.0% | 83.5% | 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% | 77.5% | 45.0% | 49.5% | 70.7% | 79.2% | 74.3% | 61.8 | 47.0% | 20.6% | 89.5% | - | - | - | - | - | - | - | 16.7% | - | - | - | 35.6% | 6.1% | - | - | - | - | - | - | - | - | - | 12.13 | - | - | - | - | - | - | - | - | - | - | - | 100.0% | 37.4 | - | - | - | - | - | - | - | - | 45.3 | - | - | - | - | - | - | - | - | - | - | 64.8% |
| Claude Sonnet 4.5 Anthropic | 88.0% | 60.8% | 1678elo | 71.4 | 15.2% | 83.9% | 83.4% | 17.8% | 87.5% | 57.3% | 83.8% | 70.7% | 80.4% | 57.0% | 53.4% | 76.5% | 79.3% | 77.6% | 71.4% | 40.6% | 84.5% | 87.5% | 64.0% | 19.0% | 0.0% | 32.9% | 45.7% | 67.0% | 74.8% | 73.3% | 50.34 | 35.6% | 22.6% | 78.1% | 0.0% | 0.0% | 100 | 0.0% | 0.0% | 0.0% | 5.0% | - | 0.0% | 0.0% | 0.0% | - | - | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | - | 0.0% | 0.0% | 0.0% | 0.0% | 0.75 | 0.75 | 0.0% | 0 | 0 | 0.0% | 0.0% | - | - | 62.9% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | - | 0 | 0.0% | 0.0% | 77.2% | 0.0% | 0 | 0 | 0 | 0.0% | 1.49 | 29.2% |
2 / 2 models
| Attribute | Claude Opus 4.5 Anthropic | Claude Sonnet 4.5 Anthropic |
|---|---|---|
| Description | Claude Opus 4.5 is an AI model from Anthropic. | anthropic/claude-sonnet-4.5 is an AI model. |
| Family | Claude | Claude |
| Params | - | Undisclosed (closed) |
| Open weights | closed | closed |
| License | proprietary | proprietary |
| Released | 24 Nov 2025 | 29 Sep 2025 |
| 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 | 0 tok/s |
| Latency | 0.00 s | 0.00 s |
| Modalities | file, image, text | text, image, file |
| Providers | - | anthropic, aws-bedrock, vertex-ai |
| Publisher | Anthropic | Anthropic |
| Reported scores | TaxEval v273.3% LiveBench - Math79.3% (LiveBench) LiveBench - Coding80.4% (LiveBench) LiveBench - Language76.5% (LiveBench) LiveBench - Data Analysis57.0% (LiveBench) |
FAQ
- Is Claude Opus 4.5 or Claude Sonnet 4.5 better?
- Across the 34 benchmarks both models report on Sophon, Claude Opus 4.5 leads on 29 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 4.5 compare on GPQA Diamond?
- Claude Opus 4.5 scores 86.6% and Claude Sonnet 4.5 scores 83.4% on GPQA Diamond.
- Which is cheaper, Claude Opus 4.5 or Claude Sonnet 4.5?
- Claude Sonnet 4.5 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 4.5 released?
- Claude Opus 4.5 was released 24 Nov 2025 by Anthropic. Claude Sonnet 4.5 was released 29 Sep 2025 by Anthropic.
Other head-to-heads
56Claude Sonnet 4.5 vs GPT-4.1 Mini35 shared evalsClaude Opus 4.5 vs GPT-5.235 shared evalsClaude Sonnet 4.5 vs GPT-5.232 shared evalsClaude Sonnet 4.5 vs GPT-5 Mini31 shared evalsClaude Sonnet 4.5 vs GPT-531 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 evalsClaude 4 Sonnet vs Claude Sonnet 4.528 shared evalsClaude Opus 4.6 vs Claude Sonnet 4.528 shared evalsClaude Sonnet 4.5 vs Kimi K2.528 shared evalsClaude Sonnet 4.5 vs Grok 4.1 Fast28 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 Sonnet 4.5 vs Gemini 3.1 Pro Preview27 shared evalsClaude Sonnet 4.5 vs DeepSeek V3.227 shared evalsClaude Opus 4.5 vs DeepSeek V3.227 shared evalsClaude Sonnet 4.5 vs GPT-5.526 shared evalsClaude Sonnet 4.5 vs GPT-5.426 shared evalsClaude Sonnet 4.5 vs Gemini 2.5 Pro26 shared evalsClaude Opus 4.5 vs GPT-5 Nano26 shared evalsClaude 4 Sonnet vs Claude Opus 4.526 shared evalsClaude Opus 4.5 vs Kimi K2.526 shared evalsClaude Opus 4.8 vs Claude Sonnet 4.525 shared evalsClaude Sonnet 4.5 vs GLM 4.725 shared evalsClaude Opus 4.5 vs GPT-5.525 shared evalsClaude Opus 4.5 vs GLM 4.725 shared evalsClaude Opus 4.5 vs GPT-5.4 Mini25 shared evalsClaude Fable 5 vs Claude Sonnet 4.524 shared evalsClaude Sonnet 4.5 vs Claude Sonnet 4.624 shared evalsClaude Opus 4.7 vs Claude Sonnet 4.524 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 Sonnet 4.5 vs GLM 5.123 shared evalsClaude Sonnet 4.5 vs gpt-oss-120b23 shared evalsClaude Sonnet 4.5 vs GPT-5.4 Mini23 shared evalsClaude Opus 4.5 vs GPT-523 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 Sonnet 4.5 vs Qwen3.6 Plus22 shared evalsClaude Opus 4.5 vs Qwen3.6 Plus22 shared evalsClaude Sonnet 4.5 vs GPT-4o21 shared evalsClaude Opus 4.5 vs gpt-oss-120b21 shared evalsClaude Sonnet 4.5 vs GPT-4.119 shared evalsClaude Opus 4.5 vs GPT-4o18 shared evalsClaude Sonnet 4.5 vs GPT-4o-mini17 shared evalsClaude Opus 4.5 vs GPT-4.1 Mini16 shared evalsClaude Sonnet 4.5 vs GPT-4.1 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 Sonnet 4.5 vs GPT-6 Astra11 shared evalsClaude Opus 4.5 vs GPT-6 Astra11 shared evals
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