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xAIProprietary
Grok 4.1 Fast
Grok 4.1 Fast is a reasoning model developed by xAI. It features an extremely long context window of 2 million tokens and is designed for high-speed processing of advanced reasoning tasks.
Parameters
Undisclosed
Context Window
2M
License
Proprietary
Release Date
2025-11-19
API Pricing
API pricing for this model is not yet available
Strengths
- ・Provides advanced reasoning
- ・2-million-token long context window
- ・Fast response performance
Weaknesses
- ・Closed-source license
- ・Closed development process
- ・Detailed specifications not fully public
Use Cases
- ・Analyzing large documents
- ・Complex logical reasoning tasks
- ・High-speed AI chat responses