Grok 4.1 Fast (reasoning)
xAI
Grok 4.1 Fast Reasoning is a high-speed variant optimized for faster reasoning while maintaining strong reasoning capabilities through "thinking tokens". It is designed for tool-calling tasks and agentic workflows. A standout feature is its massive 2 million token context window, allowing the analysis of large volumes of information in a single pass.
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Model Specifications
Technical information and release details.
Developer
xAI
Multimodal Support
Yes
Intelligence Score
38
Context Window
2m
Average Price (USD/1M tokens)
$0.28
Speed (tokens/s)
143.0
Latency (s)
6.86
Release Date
11/17/2025
Performance Statistics
The model's intelligence score is the average of these benchmark scores
Detailed Benchmarks
Compare Grok 4.1 Fast (reasoning) with other top models in specific domains.
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