All Models

xAI Grok 4.1 Fast Reasoning

grokReasoningTool Calling

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

Providers1
ReleasedNov 17, 2025
Input Modalitiestext, image
Output Modalitiestext
Tarsk Usecoding

Benchmarks

20.4
Intelligence Index
89.3
Math Index

Available Providers (1)

ProviderModel IDInput CostOutput CostContextMax OutputDocs
Heliconegrok-4-1-fast-reasoning$0.20/MTok$0.50/MTok2M2M

Capabilities

Reasoning
Tool Calling
Attachments
Open Weights
Structured Output