0

Grok 4.1 Fast

Closed

Grok 4.1 Fast is an AI model from xAI.

Publisher
xAI
Family
Grok
Input
Output
License
proprietary
Released
19 Nov 2025

Cite

Notes

Only stored in your browser.

Attribution

Attribution policy →
Input
$0
/1M tok
Output
$0
/1M tok
Blended
$0
#1/ 461/1M · 3:1
Speed
0
#115/ 461tok/s

Price & speed via Artificial Analysis · ranked across tracked models

Reasoning effortIndexSpeed
Reasoning31.30 t/s
Non-reasoning17.00 t/s

Intelligence Index per reasoning-effort setting, via Artificial Analysis · pricing identical across tiers

Reported on 32 evals across 13 domains - best 100.0% on Medpt · #1 of 2

Reported eval scores

32
Medpt100
Agent Diff Bench62
Hanabi11.8
Infraresolutionbench80.2
LiveBench - Language74.3
LiveBench - Reasoning80.2
LiveBench - Coding69.6
Terminal-Bench (Hard)14.4
LiveBench - Math83.7
IFBench36.5
LiveBench - Data Analysis52.2
LiveBench - Instruction Following28.2
CorpFin v266
TaxEval v273.1
MortgageTax42.6
τ²-bench (Tau²-bench)63.7
LiveBench64.7
MMLU-Pro74.3
Humanity's Last Exam (HLE)5.1
LiveCodeBench39.9