GPT-5.6 Sol vs Grok 4.7
GPT-5.6 Sol (OpenAI) and Grok 4.7 (xAI) compared on price, context window, speed and independent benchmarks. GPT-5.6 Sol scores higher on the Artificial Analysis Intelligence Index (47 vs 46.4), while Grok 4.7 is 2.7× cheaper on a blended basis. Pick GPT-5.6 Sol for the hardest tasks and Grok 4.7 when cost dominates.
| GPT-5.6 Sol | Grok 4.7 | |
|---|---|---|
| Provider | OpenAI | xAI |
| Input $/1M | $4.00 | $2.00 |
| Output $/1M | $20.0 | $6.00 |
| Blended $/1M (3:1) | $8.00 | $3.00 |
| Cached input $/1M | $0.40 | $0.50 |
| Context window | 1.1M | 500K |
| Knowledge cutoff | 2026-02 | 2026-05 |
| License | proprietary | proprietary |
| Speed (tok/s) | 58 | 47 |
| Artificial Analysis Intelligence Index | 47 | 46.4 |
| LMArena Elo | 1455 | — |
| GPQA Diamond | 94.1% | — |
| Humanity's Last Exam | 49.5% | 43.1% |