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Grok-4.1 Fast Non-Reasoning

Multimodal
xAI

Grok-4.1 Fast Non-Reasoning is the next generation of fast agents from the xAI API. Does not use thinking tokens for instant responses while maintaining high quality. 2M token context window. Multimodal model.

Key Specifications

Parameters
-
Context
2.0M
Release Date
November 16, 2025
Average Score
-

Timeline

Key dates in the model's history
Announcement
November 16, 2025
Last Update
February 12, 2026
Today
March 25, 2026

Technical Specifications

Parameters
-
Training Tokens
-
Knowledge Cutoff
-
Family
-
Capabilities
MultimodalZeroEval

Pricing & Availability

Input (per 1M tokens)
$0.20
Output (per 1M tokens)
$0.50
Max Input Tokens
2.0M
Max Output Tokens
30.0K
Supported Features
Function CallingStructured OutputCode ExecutionWeb SearchBatch InferenceFine-tuning

Benchmark Results

Model performance metrics across various tests and benchmarks

License & Metadata

License
proprietary
Announcement Date
November 16, 2025
Last Updated
February 12, 2026

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