xAI Corp.
grok-4-fast
xAI's latest advancement in cost-efficient reasoning models
Caching Support
Pricing
$0.2
Input tokens per million
$0.5
Output tokens per million
Caching Pricing
$0.2
Cache write per million
$0.05
Cache read per million
Technical Specifications
Context Window
2.0M tokens
Max Output Tokens
Unlimited
Global Availability
Last Updated
N/A