AzureGrok 4.1 Fast (Reasoning) model ID, context window & pricing
grok
Quick facts
Model ID grok-4-1-fast-reasoning
Source Azure
Context Window 128000
Pricing $0.20 input / $0.50 output per 1M tokens
Capabilities tool calling, reasoning, temperature control
Model overview
Grok 4.1 Fast (Reasoning) is an AI model from Azure with 128000 token context window and text, image input support.
Published pricing is $0.20 input and $0.50 output per 1M tokens.
- Workloads that use text, image inputs with text outputs.
- Agent and tool workflows that need function calling.
- Reasoning-heavy prompts where stepwise problem solving matters.
Model ID grok-4-1-fast-reasoning
Provider Azure
Family grok
Status beta
Knowledge Cutoff -
Release Date 2025-06-27
Input Modalities text, image
Output Modalities text
Context Window 128000
Input Limit 128000
Output Limit 8192
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 -