Grok 4 Fast (Reasoning) by Azure Cognitive Services

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Model details

Grok 4 Fast (Reasoning)

Azure Cognitive Servicesgrok-4-fast-reasoninggrok

Open provider page Provider docs

Quick Info

Provider: Azure Cognitive Services
Model key: grok-4-fast-reasoning
Release date: Sep 19, 2025

Cost

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

Limits

Output tokens: 30,000 tokens
Context window

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