This model is not part of the weekly automatic sync. The figures below were confirmed on 2026-08-13.
xAI flagship. Real-time X data access + 256k context inference models
Grok 4 — xAI. Context window 256,000 tokens. API pricing (per 1M tokens): Input $3, Output $15. License: Proprietary. LMArena 1,411. GPQA Diamond 87%.
| Provider | xAI |
|---|---|
| Tier | Frontier |
| Context window | 256,000 tokens |
| Max output | 16,384 tokens |
| License | Proprietary |
| API pricing (per 1M tokens) · Input | $3 |
| API pricing (per 1M tokens) · Output | $15 |
| LMArena | 1,411 (grok-4-0709) |
| GPQA Diamond | 87% |
LMArena (CC-BY 4.0, best reasoning setting, 2026-10-02) · GPQA Diamond: Epoch AI (CC-BY 4.0)
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