Claude 4 Sonnet vs Claude Sonnet 4.5
Head to head on 28 shared benchmarks, with price, context window, and release dates.
Benchmark scores
94evals · sort by any column, ⤢ to expand fullscreen
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| 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% | 99.1% | 33.9% | 72.4% | 84.2% | 62.5% | 43.9% | 35.0% | 40.0% | 74.6% | 69.6% | 31.1% | 64.6% | - | - | 77.3% | - | - | - | - | - | 22.9% | 47.8% | - | - | - | 19.8% | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 86.7% | - | - | - | - | - | - | - | - | - | - | 6.18 | 6.18 | - | - | - | - | - | 58.3% | - | 35.6% | - | - | - | - | - | 0.59 | - | - | 84.0% | 84.0% | - | 59.6% |
| Claude Sonnet 4.5 Anthropic | 88.0% | 60.8% | 1678elo | 71.4 | 83.9% | 83.4% | 17.8% | 57.3% | 70.7% | 80.4% | 57.0% | 53.4% | 76.5% | 79.3% | 77.6% | 71.4% | 0.0% | 40.6% | 84.5% | 87.5% | 64.0% | 62.9% | 32.9% | 45.7% | 74.8% | 73.3% | 35.6% | 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% | 15.2% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 87.5% | 83.8% | 0.0% | 0.0% | 0.75 | 0.75 | 0 | 0 | - | 0.0% | 0.0% | 0.0% | 0.0% | 19.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | - | - | 0.0% | 0 | 0.0% | 0.0% | 77.2% | - | 67.0% | - | 0.0% | 0 | 0 | 50.34 | 0 | - | 22.6% | 0.0% | - | - | 1.49 | 29.2% |
2 / 2 models
| Attribute | Claude 4 Sonnet Anthropic | Claude Sonnet 4.5 Anthropic |
|---|---|---|
| Description | Claude 4 Sonnet 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 | 22 May 2025 | 29 Sep 2025 |
| Context | 200,000 | 1,000,000 |
| Input $/1M | - | $3.00 |
| Output $/1M | - | $15.00 |
| Cache read $/1M | - | $0.300 |
| Cache write $/1M | - | $3.750 |
| Speed | 0 tok/s | 0 tok/s |
| Latency | 0.00 s | 0.00 s |
| Modalities | text, image | 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 4 Sonnet or Claude Sonnet 4.5 better?
- Across the 28 benchmarks both models report on Sophon, Claude Sonnet 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 Sonnet 4.5 compare on GPQA Diamond?
- Claude 4 Sonnet scores 77.7% and Claude Sonnet 4.5 scores 83.4% on GPQA Diamond.
- When were Claude 4 Sonnet and Claude Sonnet 4.5 released?
- Claude 4 Sonnet was released 22 May 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 Claude Sonnet 4.534 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 4 Sonnet vs GPT-5 Mini29 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 Sonnet 4.5 vs Gemini 3.1 Pro Preview27 shared evalsClaude Sonnet 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 4 Sonnet vs Claude Opus 4.526 shared evalsClaude Opus 4.8 vs Claude Sonnet 4.525 shared evalsClaude Sonnet 4.5 vs GLM 4.725 shared evalsClaude 4 Sonnet vs GPT-525 shared evalsClaude 4 Sonnet vs GPT-5 Nano25 shared evalsClaude 4 Sonnet vs GPT-5.225 shared evalsClaude 4 Sonnet vs Gemini 2.5 Pro25 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 4 Sonnet vs Grok 4.1 Fast24 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 4 Sonnet vs GPT-5.523 shared evalsClaude 4 Sonnet vs Gemini 3.1 Pro Preview23 shared evalsClaude 4 Sonnet vs Kimi K2.523 shared evalsClaude Sonnet 4.5 vs Qwen3.6 Plus22 shared evalsClaude 4 Sonnet vs Claude Opus 4.822 shared evalsClaude 4 Sonnet vs Claude Fable 522 shared evalsClaude 4 Sonnet vs GPT-5.422 shared evalsClaude 4 Sonnet vs Claude Opus 4.622 shared evalsClaude 4 Sonnet vs GLM 4.722 shared evalsClaude Sonnet 4.5 vs GPT-4o21 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 Sonnet 4.5 vs GPT-4.119 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 4 Sonnet vs GPT-4o-mini18 shared evalsClaude Sonnet 4.5 vs GPT-4o-mini17 shared evalsClaude Sonnet 4.5 vs GPT-4.1 Nano16 shared evalsClaude 4 Sonnet vs GPT-4.1 Nano16 shared evalsClaude Sonnet 4.5 vs GPT-6 Astra11 shared evalsClaude 4 Sonnet vs GPT-6 Astra8 shared evals
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