Claude Sonnet 4.5 vs GPT-5.4
Head to head on 26 shared benchmarks, with price, context window, and release dates.
Benchmark scores
95evals · sort by any column, ⤢ to expand fullscreen
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| GPT-5.4 OpenAI | 65.3% | 1836elo | 78.3 | 47.6% | 87.2% | 74.8% | 11.3% | 48.4% | 78.5% | 82.0% | 77.5% | 79.3% | 70.2% | 82.6% | 94.1% | 88.1% | 41.3% | 77.5% | 68.3% | 56.0% | 43.3% | 47.1% | 74.0% | 37.9% | 67.4% | 36.0% | - | - | - | - | - | - | - | 13.1% | - | - | 1.47 | - | - | 81.0% | 34.1% | 9.0% | - | - | 1272elo | - | - | - | - | - | - | - | - | - | - | 92063 | - | - | - | - | - | - | 82.8% | - | - | - | 86 | - | - | 52.2% | - | - | - | - | - | - | - | - | - | -0.61 | - | - | - | 40.8 | - | - | - | - | - | - | - | 80 | - | - | - | 60.3% |
| Claude Sonnet 4.5 Anthropic | 60.8% | 1675elo | 71.4 | 15.2% | 83.9% | 72.7% | 7.2% | 42.7% | 83.8% | 70.7% | 80.4% | 57.0% | 53.4% | 76.5% | 79.3% | 77.6% | 40.6% | 84.5% | 64.0% | 19.0% | 32.9% | 42.8% | 73.3% | 28.8% | 22.6% | 70.5% | 0.0% | 0.0% | 37.0% | 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% | 87.5% | - | 0.0% | 0.0% | 59.0% | 0.75 | 0.75 | 0.0% | - | 0 | 0 | 86.0% | - | 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% | 0.0% | - | 77.2% | 67.0% | 74.8% | 0.0% | 0 | 0 | 50.34 | - | 0 | 0.0% | 1.49 | 27.5% |
2 / 2 models
| Attribute | Claude Sonnet 4.5 Anthropic | GPT-5.4 OpenAI |
|---|---|---|
| Description | anthropic/claude-sonnet-4.5 is an AI model. | GPT-5.4 is an AI model from OpenAI. |
| Family | Claude | GPT |
| Params | Undisclosed (closed) | - |
| Open weights | closed | closed |
| License | Proprietary | proprietary |
| Released | 29 Sep 2025 | 5 Mar 2026 |
| Context | 1,000,000 | 1,050,000 |
| Input $/1M | $3.00 | $2.50 |
| Output $/1M | $15.00 | $15.00 |
| Cache read $/1M | $0.300 | $0.250 |
| 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) | GPQA Diamond74.8% (AA) SciCode47.1% (AA) τ²-bench (Tau²-bench)36.0% (AA) Terminal-Bench (Hard)37.9% (AA) Vibe Code Bench v1.167.4% |
FAQ
- Is Claude Sonnet 4.5 or GPT-5.4 better?
- Across the 26 benchmarks both models report on Sophon, GPT-5.4 leads on 22 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-5.4 compare on GPQA Diamond?
- Claude Sonnet 4.5 scores 72.7% and GPT-5.4 scores 74.8% on GPQA Diamond.
- When were Claude Sonnet 4.5 and GPT-5.4 released?
- Claude Sonnet 4.5 was released 29 Sep 2025 by Anthropic. GPT-5.4 was released 5 Mar 2026 by OpenAI.
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