Vercel AI Gateway
Grok 4.1 Fast Reasoning
grok
Model ID xai/grok-4.1-fast-reasoning
Provider Vercel AI Gateway
Family grok
Status -
Knowledge Cutoff 2024-10
Release Date 2025-07-09
Input Modalities text
Output Modalities text
Context Window 2000000
Input Limit -
Output Limit 30000
Tool Calling Yes
Reasoning Yes
Structured Output -
Temperature Control Yes
Open Weights No
Input Cost / 1M tokens $0.20
Output Cost / 1M tokens $0.50
Reasoning Cost / 1M tokens -
Cache Read Cost / 1M tokens $0.05
Cache Write Cost / 1M tokens -