# clm_816D8CB77D31

subject: xAI (/record/xai.md)  
predicate: released  
value: Grok 4.1 Fast  
valid_from: 2025-11-19  
valid_to: null  
published: 2025-11-19  
recorded: 2026-10-29  
confidence: 0.70  
status: valid  
assertable: true  
superseded_by: null  
last_updated: 2026-10-29  
checked: 2026-10-29 · its source page states the value and the date  

> Today, we’re excited to  launch two powerful new additions to the xAI API: Grok 4.1 Fast , our best tool-calling model with a 2M context window.

What https://x.ai/news/grok-4-1-fast says, word for word.

## Sources

- https://x.ai/news/grok-4-1-fast (primary, xAI, published 2025-11-19)

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