Claude 3.5 Sonnet vs Claude Sonnet 4.5
Head to head on 19 shared benchmarks, with price, context window, and release dates.
Benchmark scores
93evals · sort by any column, ⤢ to expand fullscreen
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| Claude 3.5 Sonnet Anthropic | 3.3% | 53.6% | 1451elo | 58.4 | 2.1% | 55.3% | 4.1% | 63.7% | 65.6% | 69.2% | 56.4% | 38.1% | 77.1% | 77.2% | 64.1% | 36.6% | 63.4% | 70.2% | 0.98 | - | - | 51.6% | 15.7% | - | 52.4% | - | - | 24.2% | - | - | - | - | - | 28.0% | - | - | - | - | - | - | - | - | - | 96.4 | - | - | - | - | - | - | 0.0% | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 0.0% | - | - | - | - | - | - | - | - | 51.3% | - | 25.3% | - | - | - | - | - | - | - | - | 62.6% | - | 42.7% |
| Claude Sonnet 4.5 Anthropic | 84.2% | 60.8% | 1677elo | 71.4 | 15.2% | 73.7% | 13.7% | 70.7% | 80.4% | 53.4% | 76.5% | 71.4% | 0.0% | 87.5% | 64.0% | 45.7% | 74.8% | 73.3% | 0 | 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% | 83.9% | 0.0% | 0.0% | - | 0.0% | 0.0% | 0.0% | 87.5% | 57.3% | 83.8% | - | 0.0% | 0.0% | 57.0% | 79.3% | 77.6% | 0.75 | 0.75 | 0 | 40.6% | 84.5% | 0 | 0.0% | 0.0% | 62.9% | 0.0% | 0.0% | 19.0% | 0.0% | 0.0% | 0.0% | - | 0.0% | 0.0% | 32.9% | 0.0% | 0 | 0.0% | 0.0% | 77.2% | - | 67.0% | - | 0.0% | 0 | 0 | 50.34 | 35.6% | 22.6% | 0.0% | 1.49 | - | 78.1% | 28.9% |
2 / 2 models
| Attribute | Claude 3.5 Sonnet Anthropic | Claude Sonnet 4.5 Anthropic |
|---|---|---|
| Description | Claude Sonnet 3.5 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 | 22 Oct 2024 | 29 Sep 2025 |
| Context | 200,000 | 1,000,000 |
| Input $/1M | $3.00 | $3.00 |
| Output $/1M | $15.00 | $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 | 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) | TaxEval v273.3% LiveBench - Math79.3% (LiveBench) LiveBench - Coding80.4% (LiveBench) LiveBench - Language76.5% (LiveBench) LiveBench - Data Analysis57.0% (LiveBench) |
FAQ
- Is Claude 3.5 Sonnet or Claude Sonnet 4.5 better?
- Across the 19 benchmarks both models report on Sophon, Claude Sonnet 4.5 leads on 15 of them. Which one is "better" depends on the benchmark - the table above shows every shared score.
- How do Claude 3.5 Sonnet and Claude Sonnet 4.5 compare on GPQA Diamond?
- Claude 3.5 Sonnet scores 55.3% and Claude Sonnet 4.5 scores 73.7% on GPQA Diamond.
- When were Claude 3.5 Sonnet and Claude Sonnet 4.5 released?
- Claude 3.5 Sonnet was released 22 Oct 2024 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 Sonnet 4.5 vs Kimi K2.529 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 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 Opus 4.8 vs Claude Sonnet 4.525 shared evalsClaude Sonnet 4.5 vs GLM 4.725 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 Sonnet 4.5 vs GLM 5.123 shared evalsClaude Sonnet 4.5 vs gpt-oss-120b23 shared evalsClaude Sonnet 4.5 vs Qwen3.6 Plus22 shared evalsClaude 3.5 Sonnet vs GPT-4o22 shared evalsClaude Sonnet 4.5 vs GPT-4o21 shared evalsClaude 3.5 Sonnet vs Claude 4 Sonnet21 shared evalsClaude 3.5 Sonnet vs Gemini 2.5 Pro21 shared evalsClaude Sonnet 4.5 vs GPT-4.119 shared evalsClaude 3.5 Sonnet vs GPT-5 Mini19 shared evalsClaude 3.5 Sonnet vs GPT-4o-mini19 shared evalsClaude 3.5 Sonnet vs GPT-4.118 shared evalsClaude 3.5 Sonnet vs GPT-4.1 Mini17 shared evalsClaude Sonnet 4.5 vs GPT-4o-mini17 shared evalsClaude 3.5 Sonnet vs GPT-517 shared evalsClaude 3.5 Sonnet vs GPT-5 Nano17 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 evalsClaude Sonnet 4.5 vs GPT-4.1 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 Sonnet 4.5 vs GPT-6 Astra11 shared evalsClaude 3.5 Sonnet vs Qwen3.6 Plus11 shared evalsClaude 3.5 Sonnet vs GPT-6 Astra6 shared evals
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