# Grok 4.1 spotted on models.dev

Grok 4.1 from xAI was first recorded on 31 Oct 2026. Its release date is not established. Catalogues list a 200,000 tokens context window. 2 evidence links.

- Kind: Sighting
- Developer: xAI
- Confidence: Supported
- First seen: 2026-10-31T22:25:02.874Z
- Model: [Grok 4.1](https://alexgetman.com/models/xai/grok-4-1/)
- Canonical: https://alexgetman.com/signals/2026/10/31/grok-4-1/

## Evidence links

- [models.dev · catalogue](https://models.dev/#grok-4.1)
- [Arena · leaderboards](https://x.ai/news/grok-4-1)