All Models

Grok 4 Fast

grok Reasoning Tool Calling Attachments
Providers 2
Released Sep 19, 2025
Input Modalities text, image
Output Modalities text
Tarsk Use coding

Benchmarks

16.5
Intelligence Index
41.3
Math Index

Available Providers (2)

Provider Model ID Input Cost Output Cost Context Max Output Docs
Requesty xai/grok-4-fast $0.20/MTok $0.50/MTok 2M 64K
ZenMux x-ai/grok-4-fast $0.20/MTok $0.50/MTok 2M 64K

Capabilities

Reasoning
Tool Calling
Attachments
Open Weights
Structured Output