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Grok 4.1 Fast Reasoning

Grok 4.1 with fast reasoning and vision support.

xai/grok-4-1-fast-reasoning

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Streaming

Vision

Tools

Reasoning

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xAI Pricing for Grok 4.1 Fast Reasoning

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xAI

Context: 2M

Deactivated since May 15, 2026

Input

$0.2

/M tokens

Cached

$0.05

/M tokens

Output

$0.5

/M tokens

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≤128K tokens

$0.2

$0.05

$0.5

>128K tokens

$0.4

$0

$1