Back to Grok 4 Fast Reasoning

Grok 4 Fast Reasoning

Grok 4 optimized for fast reasoning.

grok-4-fast-reasoning

STABLEModel DeactivatedGet Started

Streaming

Vision

Tools

Reasoning

JSON Output

Select Provider

xAI Pricing for Grok 4 Fast Reasoning

View detailed pricing and capabilities for this provider.

xAI

Context: 2M

Deactivated since May 15, 2026

Input

$0.2

/M tokens

Cached

$0.05

/M tokens

Output

$0.5

/M tokens

Tiered Pricing

IN

CACHED

OUT

≤128K tokens

$0.2

$0.05

$0.5

>128K tokens

$0.4

$0

$1