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Grok
xAI's model family, notable for tight integration with X (formerly Twitter) and one of the largest disclosed training clusters in the industry.
Model Facts
Latest model: Grok 4.7
- Provider
- xAI
- Released
- Sep 21, 2026
- Context window
- 500K tokens
- Weights
- Closed
Full Model List
| Model | Released | Note |
|---|---|---|
| Grok 4.7 | Sep 21, 2026 | current frontier model for coding, agents and knowledge work |
| Grok 4.6 | Aug 12, 2026 | scored 61 on the Artificial Analysis Intelligence Index |
| Grok 4.5 | Jul 8, 2026 | 500K-token context |
| Grok 4.20 | Mar 10, 2026 | 1M-token context |
| Grok-3 | Feb 17, 2025 | major reasoning-focused jump |
| Grok-2 | Aug 13, 2024 | first version broadly available via the X app |
| Grok-1 | Nov 4, 2023 | first public Grok release |
| Grok 5 | – | still in training; Musk says 4.8 and 4.9 come first |
- Official model page:
- x.ai
- Official documentation:
- docs.x.ai
- Other sources:
- Grok models explained
What it is
Grok is xAI's model family, tightly integrated with X (formerly Twitter). The current model is Grok 4.7, released September 21, 2026 as xAI's frontier model for coding, agentic tasks and knowledge work, with a 500K-token context window. It is available on the xAI API, in Cursor and in Grok Build.
What's next
Grok 5 has not been released and has no committed date; Elon Musk has said versions 4.8 and 4.9 will arrive before it.
Where these numbers come from
The scores are xAI's own published figures for Grok 4.7: 71.0% on DeepSWE v1.1 (high effort) and 37.6% on Terminal-Bench 4.0, up from 65.2% and 20.3% for Grok 4.6. They are vendor-reported, not independent tests.
Notable traits
- Real-time-oriented integration with X.
- Shipped as frequent point releases (4.5 → 4.6 → 4.7 within about three months).
- Closed weights — available through X, the Grok apps and the xAI API.