All Models

Grok-4-Fast-Reasoning

grok Reasoning Tool Calling Attachments Structured Output
Providers 6
Released Jul 9, 2025
Input Modalities text, image
Output Modalities text
Tarsk Use coding

Benchmarks

35.1
Intelligence Index
27.4
Coding Index
89.7
Math Index

Available Providers (6)

Provider Model ID Input Cost Output Cost Context Max Output Docs
Jiekou.AI grok-4-fast-reasoning $0.18/MTok $0.45/MTok 2M 2M
Poe xai/grok-4-fast-reasoning $0.20/MTok $0.50/MTok 2M 128K
Azure Cognitive Services grok-4-fast-reasoning $0.20/MTok $0.50/MTok 2M 30K
302.AI grok-4-fast-reasoning $0.20/MTok $0.50/MTok 2M 30K
Vercel AI Gateway xai/grok-4-fast-reasoning $0.20/MTok $0.50/MTok 2M 256K
Azure grok-4-fast-reasoning $0.20/MTok $0.50/MTok 2M 30K

Capabilities

Reasoning
Tool Calling
Attachments
Open Weights
Structured Output