Anthropic Claude Sonnet 4 vs OpenAI GPT-4o
Verdict: Claude Sonnet 4 wins on depth and safety (MMLU 88.5, stronger context per Anthropic evals) while GPT-4o excels in speed and multimodality (real-time audio per OpenAI benchmarks). Claude for analytical work; GPT-4o wins for interactive use. Direct head-to-head tests on LMSYS arena show Claude 4 Sonnet at 1289 Elo vs GPT-4o at 1265.
How we scored it
Spec verificationOwner sentimentLive pricing (4h refresh)Editorial review
Our methodology
Winner: Anthropic Claude Sonnet 4
Anthropic Claude Sonnet 4: 8.5/10
OpenAI GPT-4o: 8/10
Spec-by-spec comparison
| Anthropic Claude Sonnet 4 | OpenAI GPT-4o | |
|---|---|---|
| context_window | 200K tokens | 128K tokens |
| multimodal | Text + image | Text + image + audio |
| training_data | Up to 2025 | Up to 2023 |
| reasoning_benchmark | MMLU 88.5 | MMLU 88.7 |
Anthropic Claude Sonnet 4
What works
- Strong safety alignment
- Excellent long-context coherence
- Detailed step-by-step reasoning
What doesn't
- Slower response speed on complex queries
- Stricter content filters
OpenAI GPT-4o
What works
- Fastest multimodal responses
- Strong coding and tool use
- Broad real-time knowledge via browsing
What doesn't
- Weaker long-context retention
- More frequent hallucinations on facts
Bottom line
Our pick: Anthropic Claude Sonnet 4.
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