xAI
xai/grok-4-fast-reasoning
Pricing (per 1M tokens)
Input
$0.200
Output
$0.500
Cache Write
—
Cache Read
$0.050
Specs
Context Window2M (2,000,000 tokens)
Max Output Tokens2M (2,000,000 tokens)
Capabilities
Vision
Function Calling
Prompt Caching
Reasoning
Computer Use
Response Schema
PDF Input