GPT-6 Astra vs Grok 4.7
GPT-6 Astra (OpenAI) and Grok 4.7 (xAI) compared on price, context window, speed and independent benchmarks. GPT-6 Astra scores higher on the Artificial Analysis Intelligence Index (52.7 vs 46.4), while Grok 4.7 is 6.7× cheaper on a blended basis. Pick GPT-6 Astra for the hardest tasks and Grok 4.7 when cost dominates.
| GPT-6 Astra | Grok 4.7 | |
|---|---|---|
| Provider | OpenAI | xAI |
| Input $/1M | $10.0 | $2.00 |
| Output $/1M | $50.0 | $6.00 |
| Blended $/1M (3:1) | $20.0 | $3.00 |
| Cached input $/1M | $1.00 | $0.50 |
| Context window | 1.1M | 500K |
| Knowledge cutoff | 2026-04 | 2026-05 |
| License | proprietary | proprietary |
| Speed (tok/s) | 58 | 47 |
| Artificial Analysis Intelligence Index | 52.7 | 46.4 |
| LMArena Elo | 1444 | — |
| GPQA Diamond | 96.1% | — |
| Humanity's Last Exam | 54.7% | 43.1% |