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grok-4-fast

33K max output

chat

Pricing

Per 1M tokens

Input

$0.20

Cached input

$0.05

Output

$0.50

Cache write

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Modalities

Input

text

Output

text

Features

Streaming

Function calling

Vision

Reasoning

JSON mode

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Grok 4 Fast

Input

$0.20/M

Output

$0.50/M

Text Generation