All Models

Grok 4.1 Fast

Reasoning Tool Calling Attachments Structured Output

Fast Grok model for responsive chat, reasoning, and tool-assisted work

Providers 2
Released Nov 19, 2025
Input Modalities text, image
Output Modalities text
Tarsk Use coding

Benchmarks

17
Intelligence Index
34.3
Math Index

Available Providers (2)

Provider Model ID Input Cost Output Cost Context Max Output Docs
ZenMux x-ai/grok-4.1-fast $0.20/MTok $0.50/MTok 2M 64K
Ofox x-ai/grok-4.1-fast $0.20/MTok $0.50/MTok 2M 30K

Capabilities

Reasoning
Tool Calling
Attachments
Open Weights
Structured Output