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
| Model | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 | 88.0% | 60.8% | 15.2% | 83.4% | 17.8% | 57.3% | 0.0% | 70.7% | 80.4% | 53.4% | 76.5% | 71.4% | 0.0% | 87.5% | 64.0% | 45.7% | 74.8% | 73.3% | 35.6% | 0 | 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% | 1678elo | 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 | - | 29.2% |
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 83.4% 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.
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 Claude Sonnet 4.528 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 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 GPT-5.4 Mini23 shared evalsClaude Sonnet 4.5 vs Qwen3.6 Plus22 shared evalsGemini 2.5 Pro vs GPT-4o22 shared evalsGPT-4o vs GPT-4o-mini21 shared evalsGPT-4.1 Mini vs GPT-4o20 shared evalsGPT-4o vs GPT-5 Mini20 shared evalsClaude 4 Sonnet vs GPT-4o20 shared evalsClaude Sonnet 4.5 vs GPT-4.119 shared evalsGPT-4o vs GPT-519 shared evalsGPT-4.1 vs GPT-4o19 shared evalsGPT-4o vs GPT-5 Nano18 shared evalsGPT-4o vs GPT-5.218 shared evalsClaude Opus 4.5 vs GPT-4o18 shared evalsDeepSeek V3.2 vs GPT-4o18 shared evalsClaude Sonnet 4.5 vs GPT-4o-mini17 shared evalsGPT-4o vs gpt-oss-120b17 shared evalsClaude Sonnet 4.5 vs GPT-4.1 Nano16 shared evalsGPT-4.1 Nano vs GPT-4o16 shared evalsGPT-4o vs Grok 4.1 Fast16 shared evalsGLM 4.7 vs GPT-4o16 shared evalsGPT-4o vs GPT-5.515 shared evalsClaude Opus 4.6 vs GPT-4o15 shared evalsGPT-4o vs Kimi K2.515 shared evalsGemini 3.1 Pro Preview vs GPT-4o14 shared evalsClaude Opus 4.8 vs GPT-4o14 shared evalsGPT-4o vs GPT-5.414 shared evalsClaude Sonnet 4.6 vs GPT-4o14 shared evalsClaude Opus 4.7 vs GPT-4o14 shared evalsGLM 5.1 vs GPT-4o14 shared evalsGPT-4o vs Qwen3.6 Plus14 shared evalsGPT-4o vs GPT-5.4 Mini14 shared evalsClaude Fable 5 vs GPT-4o13 shared evalsClaude Sonnet 4.5 vs GPT-6 Astra11 shared evalsGPT-4o vs GPT-6 Astra4 shared evals
Comparing something else? Build your own side-by-side.