xAI just released Grok 4.1 Fast API

Ranks #1 on 𝜏²-Bench on Telecom (Agentic Tool Use) - Outperforms Gemini 3 Pro

- State-of-the-art tool calling
- Massive 2M Context Window
- Trained for the real world use

Grok 4 Fast non-reasoning ➝ Instant Response
Grok 4 Fast - Reasoning… pic.twitter.com/UlMlvkaEUC— X Freeze (XFreeze) November 20, 2025 https://x.com/XFreeze/stat...