Claude Sonnet 4.5 vs GPT-4o
Head to head on 21 shared benchmarks, with price, context window, and release dates.
Benchmark scores
94evals · sort by any column, ⤢ to expand fullscreen
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| GPT-4o OpenAI | 6.0% | 45.9% | 0.3% | 54.3% | 2.4% | 34.3% | 0.0% | 55.1% | 46.1% | 70.1% | 49.0% | 30.9% | 75.9% | 74.8% | 57.4% | 33.3% | 21.6% | 74.5% | 8.3% | 0.98 | 25.1% | - | - | 18.2% | 15.0% | 38 | - | - | - | - | - | 0.0% | 0.33 | - | - | - | 6.1% | - | - | - | - | - | - | - | - | - | - | - | - | 96.1 | - | - | - | - | - | - | - | - | - | - | - | - | 10.8% | - | - | - | - | - | - | 54.0% | - | - | - | - | - | - | - | - | 5.71 | - | - | - | - | - | - | - | 61.2 | - | - | - | - | - | - | 32.5% | 33.4% |
| Claude Sonnet 4.5 Anthropic | 37.0% | 60.8% | 15.2% | 72.7% | 7.2% | 42.7% | 0.0% | 70.7% | 80.4% | 53.4% | 76.5% | 59.0% | 0.0% | 86.0% | 64.0% | 42.8% | 74.8% | 73.3% | 28.8% | 0 | 70.5% | 0.0% | 0.0% | - | - | - | 100 | 0.0% | 0.0% | 0.0% | 5.0% | - | - | 0.0% | 0.0% | 0.0% | - | 0.0% | 0.0% | 1675elo | 71.4 | 0.0% | 0.0% | 0.0% | 0.0% | 83.9% | 0.0% | 0.0% | 0.0% | - | 0.0% | 0.0% | 87.5% | 83.8% | 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 | 22.6% | 0.0% | 1.49 | - | 27.5% |
2 / 2 models
| Attribute | Claude Sonnet 4.5 Anthropic | GPT-4o OpenAI |
|---|---|---|
| Description | anthropic/claude-sonnet-4.5 is an AI model. | GPT-4o is an AI model from OpenAI. |
| Family | Claude | GPT |
| Params | Undisclosed (closed) | - |
| Open weights | closed | closed |
| License | Proprietary | proprietary |
| Released | 29 Sep 2025 | 20 Nov 2024 |
| Context | 1,000,000 | 128,000 |
| Input $/1M | $3.00 | $2.50 |
| Output $/1M | $15.00 | $10.00 |
| Cache read $/1M | $0.300 | $1.250 |
| Cache write $/1M | $3.750 | - |
| Speed | 0 tok/s | 0 tok/s |
| Latency | 0.00 s | 0.00 s |
| Modalities | text, image, file | text, image, file |
| Providers | anthropic, aws-bedrock, vertex-ai | - |
| Publisher | Anthropic | OpenAI |
| Reported scores | TaxEval v273.3% LiveBench - Math79.3% (LiveBench) LiveBench - Coding80.4% (LiveBench) LiveBench - Language76.5% (LiveBench) LiveBench - Data Analysis57.0% (LiveBench) | Taubench61.2 pass^1 GSM8K96.1 Accuracy ScholarSearch5.71 Social Sciences & Humanities (%) MortgageTax57.4% AIME202438 pass@1 |
FAQ
- Is Claude Sonnet 4.5 or GPT-4o better?
- Across the 21 benchmarks both models report on Sophon, Claude Sonnet 4.5 leads on 16 of them. Which one is "better" depends on the benchmark - the table above shows every shared score.
- How do Claude Sonnet 4.5 and GPT-4o compare on GPQA Diamond?
- Claude Sonnet 4.5 scores 72.7% and GPT-4o scores 54.3% on GPQA Diamond.
- Which is cheaper, Claude Sonnet 4.5 or GPT-4o?
- GPT-4o is cheaper at $10.00 per million output tokens against $15.00 for Claude Sonnet 4.5 - about 1.5x.
- When were Claude Sonnet 4.5 and GPT-4o released?
- Claude Sonnet 4.5 was released 29 Sep 2025 by Anthropic. GPT-4o was released 20 Nov 2024 by OpenAI.
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