Claude Opus 5.5 vs DeepSeek-R1
A direct, empirical evaluation of Claude Opus 5.5 (Anthropic) against DeepSeek-R1 (DeepSeek-AI).
Claude Opus 5.5
Developed by Anthropic · Proprietary Frontier Reasoner parameters
Autonomous enterprise codebase migrations, GitHub Copilot multi-file edits, SWE-bench Pro issue resolution (89.9%), and CodeRabbit automated reviews.
DeepSeek-R1
Developed by DeepSeek-AI · 671B parameters
Olympiad mathematics, logic verification, and autonomous thinking chains.
| Metric | Claude Opus 5.5 | DeepSeek-R1 |
|---|---|---|
| SWE-bench Verified | 89.9% | 49.2% |
| MMLU-Pro | 92.4% | 84% |
| MATH-500 | 97.2% | 97.3% |
| Context Window | 500,000 tokens | 128,000 tokens |
| Input Pricing (per 1M) | $4.00 | $0.55 |
| Output Pricing (per 1M) | $20.00 | $2.19 |