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Grok 4.1 Fast Reasoning

ReasoningTool CallingAttachmentsStructured Output

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

Providers7
ReleasedNov 19, 2025
Input Modalitiestext, image, audio, video, pdf
Output Modalitiestext
Tarsk Usecoding

Benchmarks

20.4
Intelligence Index
89.3
Math Index

Available Providers (7)

ProviderModel IDInput CostOutput CostContextMax OutputDocs
Jiekou.AIgrok-4-1-fast-reasoning$0.18/MTok$0.45/MTok2M2M
LLM Gatewayazure-ai-foundry/grok-4-1-fast-reasoning$0.20/MTok$0.50/MTok2M30K
Vercel AI Gatewayspacexai/grok-4.1-fast-reasoning$0.20/MTok$0.50/MTok1M1M
DevPass (LLM Gateway)grok-4-1-fast-reasoning$0.20/MTok$0.50/MTok2M30K
302.AIgrok-4-1-fast-reasoning$0.20/MTok$0.50/MTok2M30K
Qiniux-ai/grok-4.1-fast-reasoning—/MTok—/MTok20M2M
Poexai/grok-4.1-fast-reasoning—/MTok—/MTok2M30K

Capabilities

Reasoning
Tool Calling
Attachments
Open Weights
Structured Output