# xAI — Grok 4.1 Fast and Agent Tools API

- Company: xAI (x.ai)
- Announced: 2025-11-19T00:00:00+00:00
- Category: api-release
- Subject: Grok
- Models affected: Grok 4.1 Fast
- Source: https://x.ai/news/grok-4-1-fast
- Record: https://forck.live/items/3482-grok-4-1-fast-and-agent-tools-api

xAI announces Grok 4.1 Fast and Agent Tools API, bringing next-generation tool-calling agents to the xAI API.

## Evidence

Verbatim from https://x.ai/news/grok-4-1-fast:

> Grok 4.1 Fast and Agent Tools API Bringing the next generation of tool-calling agents to the xAI API Nov 19, 2025

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