Claude Opus 5.5 vs Grok 4.7
Claude Opus 5.5 (Anthropic) and Grok 4.7 (xAI) compared on price, context window, speed and independent benchmarks. Claude Opus 5.5 scores higher on the Artificial Analysis Intelligence Index (57.6 vs 46.4), while Grok 4.7 is 2.7× cheaper on a blended basis. Pick Claude Opus 5.5 for the hardest tasks and Grok 4.7 when cost dominates.
| Claude Opus 5.5 | Grok 4.7 | |
|---|---|---|
| Provider | Anthropic | xAI |
| Input $/1M | $4.00 | $2.00 |
| Output $/1M | $20.0 | $6.00 |
| Blended $/1M (3:1) | $8.00 | $3.00 |
| Cached input $/1M | $0.20 | $0.50 |
| Context window | 1M | 500K |
| Knowledge cutoff | 2026-06 | 2026-05 |
| License | proprietary | proprietary |
| Speed (tok/s) | 85 | 47 |
| Artificial Analysis Intelligence Index | 57.6 | 46.4 |
| Humanity's Last Exam | 61.4% | 43.1% |