Poe
Grok-4-Fast-Reasoning
grok
Model ID xai/grok-4-fast-reasoning
Provider Poe
Family grok
Status -
Knowledge Cutoff -
Release Date 2025-09-16
Input Modalities text, image
Output Modalities text
Context Window 2000000
Input Limit -
Output Limit 128000
Tool Calling Yes
Reasoning Yes
Structured Output -
Temperature Control No
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 -