Models
x-ai/grok-4.1-fast
30K max output
chat
Pricing
Per 1M tokens
Input
$0.20
Cached input
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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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OpenRouter
Grok 4.1 Fast
Input
$0.20/M
Output
$0.50/M
Tool Calling