X-aiClosed Weights

X-Ai/Grok 4.1 Fast Reasoning

x-ai/grok-4.1-fast-reasoning

Best Input Price

$0.00 / 1M

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

Context Window

20,000,000 tokens

Reasoning

Supported

Tool Calling

Supported

Released

2025-12-19

Inference Providers (1)

Provider	Model ID	Context	Input / 1M	Output / 1M	Action
Qiniu	x-ai/grok-4.1-fast-reasoning	20,000,000	$0.00	$0.00	Docs ↗