# Grok 4.1 Fast: AI model fact sheet

- **Provider:** xai
- **Released:** 2025-11-21
- **OpenRouter ID:** x-ai/grok-4.1-fast
- **Capabilities:** conversation, reasoning, code-generation, analysis, tool-use

Grok 4.1 Fast model integrated via automation on 2025-11-21

Source: real side-by-side outputs, pricing and specs at https://rival.tips/models/grok-4.1-fast