xAI Corp.
grok-4-1-fast-reasoning
A frontier multimodal model optimized specifically for high-performance agentic tool calling.
Vision Support
Caching Support
Computer Use
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