← Artificial Acceleration
xAI · Grok
Grok 4.1 Fast
Released
19 Nov 2025
· 61 days after
Grok 4 Fast
Intelligence
—
no index score yet
Price
not priced
no list price
Speed
—
not measured
Weights
Closed
US lab
xAI’s best score over time
12 Aug 2026
21 Sep 2026
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Grok 4 Fast
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