Grok 4 Fast

Reasoning

Creator

xAI

Released

2025-09-19

Intelligence

35.1

Artificial Analysis Index

Coding

27.4

Artificial Analysis Index

In $/1M

$0.20

input tokens

Out $/1M

$0.50

output tokens

Blended $/1M

$0.28

3:1 blended

Speed

0

tokens / sec

Benchmark breakdown

Independent evaluation scores, normalized to 0–100.

GPQA Diamond
85
Humanity’s Last Exam
17
MMLU-Pro
85
SciCode
44
LiveCodeBench
83
MATH-500
AIME 2025
90
τ²-Bench (agentic)
66
Terminal-Bench Hard
19
IFBench
51
Via Artificial Analysis