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

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Attribution

Benchmark scores: AA LiveBenchmatharenaprime-hub AfterQuery Vals AI

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Input

$0

/1M tok

Output

$0

/1M tok

Blended

$0

#1/ 458/1M · 3:1

Speed

0

#239/ 458tok/s

Price & speed via Artificial Analysis · ranked across tracked models

Reported on 30 evals across 12 domains - best 100.0% on Medpt · #1 of 2

Reported eval scores

30

Agent Diff Bench62

Infraresolutionbench80.2

LiveBench - Language74.3

LiveBench - Reasoning80.2

LiveBench - Coding69.6

Terminal-Bench (Hard)14.4

LiveBench - Math83.7

LiveBench - Data Analysis52.2

LiveBench - Instruction Following28.2

Humanity's Last Exam (HLE)5

τ²-bench (Tau²-bench)63.7

GPQA Diamond63.7

LiveCodeBench39.9