Alex Getmanearly AI signals
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Grok 4.1 Fast

xAI

Released Updated

Timeline

  1. · API availability · evidence link
  1. · Evidence links · GitHub search · xAI · pulls · Deathxi/Grim · @Deathxi
Specifications

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

Questions

When was Grok 4.1 Fast released?

On 19 Nov 2025.