Claude Sonnet 4.5 vs GPT-5.2
Head to head on 32 shared benchmarks, with price, context window, and release dates.
Benchmark scores
93evals · sort by any column, ⤢ to expand fullscreen
| Model | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| GPT-5.2 OpenAI | 51.0% | 100 | 65.9% | 1699elo | 71.6 | 40.7% | 71.2% | 8.0% | 85.0% | 47.4% | 79.0% | 78.7% | 76.1% | 78.2% | 61.8% | 79.8% | 93.2% | 83.2% | 66.9% | 49.7% | 84.4% | 81.4% | 67.1% | 15.0% | 49.3% | 40.4% | 66.7% | 71.8% | 75.8% | 31.8% | 53.5% | 46.5% | - | - | - | - | - | - | 100.0% | 0.0% | 16.7% | - | - | - | 60.0% | 40.6% | 9.4% | - | - | - | - | - | - | - | - | - | - | 12.93 | - | - | - | - | 24.0% | - | - | - | 72.0% | - | - | - | - | 96.7 | - | - | - | 18.7% | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 56.3% |
| Claude Sonnet 4.5 Anthropic | 37.0% | 100 | 60.8% | 1675elo | 71.4 | 15.2% | 72.7% | 7.2% | 87.5% | 42.7% | 83.8% | 70.7% | 80.4% | 57.0% | 53.4% | 76.5% | 79.3% | 77.6% | 59.0% | 40.6% | 84.5% | 86.0% | 64.0% | 19.0% | 32.9% | 42.8% | 67.0% | 74.8% | 73.3% | 28.8% | 22.6% | 70.5% | 0.0% | 0.0% | 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% | 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% | 0.0% | 77.2% | 0.0% | 0 | 0 | 50.34 | 0 | 0.0% | 1.49 | 27.5% |
2 / 2 models
| Attribute | Claude Sonnet 4.5 Anthropic | GPT-5.2 OpenAI |
|---|---|---|
| Description | anthropic/claude-sonnet-4.5 is an AI model. | GPT-5.2 is an AI model from OpenAI. |
| Family | Claude | GPT |
| Params | Undisclosed (closed) | - |
| Open weights | closed | closed |
| License | Proprietary | proprietary |
| Released | 29 Sep 2025 | 11 Dec 2025 |
| Context | 1,000,000 | 400,000 |
| Input $/1M | $3.00 | $1.75 |
| Output $/1M | $15.00 | $14.00 |
| Cache read $/1M | $0.300 | $0.175 |
| Cache write $/1M | $3.750 | - |
| Speed | 0 tok/s | 0 tok/s |
| Latency | 0.00 s | 0.00 s |
| Modalities | text, image, file | file, image, text |
| 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) |
FAQ
- Is Claude Sonnet 4.5 or GPT-5.2 better?
- Across the 32 benchmarks both models report on Sophon, GPT-5.2 leads on 20 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-5.2 compare on GPQA Diamond?
- Claude Sonnet 4.5 scores 72.7% and GPT-5.2 scores 71.2% on GPQA Diamond.
- Which is cheaper, Claude Sonnet 4.5 or GPT-5.2?
- GPT-5.2 is cheaper at $14.00 per million output tokens against $15.00 for Claude Sonnet 4.5 - about 1.1x.
- When were Claude Sonnet 4.5 and GPT-5.2 released?
- Claude Sonnet 4.5 was released 29 Sep 2025 by Anthropic. GPT-5.2 was released 11 Dec 2025 by OpenAI.
Comparing something else? Build your own side-by-side.