0

Grok 4 Fast

Closed

Grok 4 Fast is an AI model from xAI.

Publisher
xAI
Family
Grok
Input
Output
Released
19 Sep 2025

Cite

Notes

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Attribution

Benchmark scores
AAprime-hubVals AI
Attribution policy →
Input
$0.20
/1M tok
Output
$0.50
/1M tok
Blended
$0.28
#228/ 414/1M · 3:1
Speed
0
#221/ 414tok/s

Price & speed via Artificial Analysis · ranked across tracked models

Reported on 20 evals across 11 domains - best 79.7% on MedScribe · #16 of 47

Reported eval scores

20