Grok 4.1 Fast Reasoning | Sulat AI Models

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Grok 4.1 Fast Reasoning | Sulat AI Models

Model details

Grok 4.1 Fast Reasoning

Find out what this model does, when it was released, and which provider serves it.

NanoGPTx-ai/grok-4.1-fast-reasoninggrok

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Quick Info

Provider: NanoGPT
Model key: x-ai/grok-4.1-fast-reasoning
Release date: Nov 20, 2025
Last updated: Nov 20, 2025
Knowledge: Unknown
Input modalities: text, image
Output modalities: text
Capabilities: Reasoning, Attachments
Cost summary: In $0.20 · Out $0.50
Limit summary: 2,000,000 token context window

Cost

Input token cost: $0.20
Output token cost: $0.50

Limits

Input tokens: 2,000,000 tokens
Output tokens: 131,072 tokens

Context window

2,000,000 tokens