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Grok 4 Fast Thinking

grok Reasoning Tool Calling Attachments Structured Output
Providers 1
Released Jul 9, 2025
Input Modalities text, image
Output Modalities text
Tarsk Use coding

Available Providers (1)

Provider Model ID Input Cost Output Cost Context Max Output Docs
NanoGPT x-ai/grok-4-fast:thinking $0.20/MTok $0.50/MTok 2M 131.1K

Capabilities

Reasoning
Tool Calling
Attachments
Open Weights
Structured Output