Overview
An efficient Grok 4 variant unifying reasoning and non-reasoning modes with 2M context and live search.
Grok 4 Fast
An efficient Grok 4 variant unifying reasoning and non-reasoning modes with 2M context and live search.
MODEL NUMBER085
- Release date
- 2025-09-19
- Organization
- SpaceXAI
- Family
- Grok
01
Specifications
Only published specifications are shown.
02
Overview
PreviousGrok 4— · — ctx
CurrentGrok 4 Fast— · 2M ctx
New capabilities Hybrid reasoning Long context
04
Architecture & capabilities
Key capabilities
Hybrid reasoningWeb searchX searchLong context
05
Release history
Grok 4 Fast launched.
View source06
Related models
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