Claude Opus 5.5 (Canary Checkpoint) vs DeepSeek V4.1 Flash
A direct, empirical evaluation of Claude Opus 5.5 (Canary Checkpoint) (Anthropic) against DeepSeek V4.1 Flash (DeepSeek-AI).
Claude Opus 5.5 (Canary Checkpoint)
Developed by Anthropic · Frontier Mixture-of-Experts Architecture parameters
Autonomous repository issue resolution (81.4% SWE-bench Verified), native 3D glTF/OBJ mesh synthesis, and sub-300ms time-to-first-token.
DeepSeek V4.1 Flash
Developed by DeepSeek-AI · 552B parameters
High-throughput software engineering, autonomous coding loops, terminal agents, 1M long-context retrieval, and low-cost production inference.
| Metric | Claude Opus 5.5 (Canary Checkpoint) | DeepSeek V4.1 Flash |
|---|---|---|
| SWE-bench Verified | 81.4% | 67.2% |
| MMLU-Pro | 94.2% | 78.4% |
| MATH-500 | 97.9% | 92.6% |
| Context Window | 1,000,000 tokens | 1,000,000 tokens |
| Input Pricing (per 1M) | $5.00 | $0.06 |
| Output Pricing (per 1M) | $25.00 | $0.22 |