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x-AI/Grok-4.1-Fast

xAI · grok-4-1-fast

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Fast Grok model for responsive chat, reasoning, and tool-assisted work

Specification

xai listing

Context
2M
Max output
2M
Released
2025-11-20
Knowledge cutoff
2025-01-01
Retires
2026-05-15
Open weights
no
Input
text
Output
text

Price

US dollars per million tokens · xai list price

Input
$1.25
Output
$2.50
Cache read
$0.20

Long-context price tiers

the rate above each context threshold

AbovePrice$/M
200KCache read$0.40
200KInput$2.50
200KOutput$5.00

Available from 5 hosts

HostIn $/MOut $/MCache rdCache wrContextOutputRetires
xaivendor$1.25$2.50$0.202M2M2026-05-15
ofox · x-ai$0.20$0.50$0.052M30K
zenmux · x-ai$0.20$0.50$0.052M64K
oci · oci$5.00$25.00131K131K
qiniu-ai · x-ai2M2M

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