# Grok 4.1 Fast

Grok 4.1 Fast is a model from xAI, released on 19 Nov 2025.

- Developer: xAI
- Id: grok-4-1-fast
- Reported: 2026-11-13T17:30:22.000Z
- Released: 2025-11-19T00:00:00.000Z
- Sighting: 2026-10-07T19:38:07.564Z
  - [evidence link](https://docs.x.ai/developers/release-notes#grok-41-fast-is-available-in-enterprise-api)
- Status: Released
- API availability: 2025-11-19
  - [evidence link](https://docs.x.ai/developers/release-notes#grok-41-fast-is-available-in-enterprise-api)
- Canonical: https://alexgetman.com/models/xai/grok-4-1-fast-2/

## Questions

### When was Grok 4.1 Fast released?

On 19 Nov 2025.

## Timeline

- 2026-11-13T18:49:32.453Z · [GitHub search · xAI · pulls · Deathxi/Grim · @Deathxi](https://github.com/Deathxi/Grim/pull/27)

## Evidence links

- [xai-release-notes](https://docs.x.ai/developers/release-notes#grok-41-fast-is-available-in-enterprise-api)
- [GitHub search · xAI · pulls · Deathxi/Grim · @Deathxi](https://github.com/Deathxi/Grim/pull/27)

## Signals