Grok 4.1 Fast
Parameters
-
Context Length
128K
Modality
Text
Architecture
Dense
License
Proprietary
Release Date
1 Jun 2025
Knowledge Cutoff
-
Technical Specifications
Attention Structure
Multi-Head Attention
Hidden Dimension Size
-
Number of Layers
-
Attention Heads
-
Key-Value Heads
-
Activation Function
-
Normalization
-
Position Embedding
Absolute Position Embedding
Grok 4.1 Fast
Fast variant of Grok 4.1 optimized for reduced latency while maintaining capabilities. Strong reasoning (80.20), excellent mathematics (83.72), and solid language understanding (74.33). Web development Elo 1235. Good balance of speed and performance for real-time applications requiring quick responses.
About Grok
xAI's conversational AI models with real-time knowledge access and strong performance across reasoning, coding, and language tasks. Features extended context windows, fast inference variants, and specialized coding versions. Known for direct communication style and integration with X platform. Includes reasoning variants and optimized versions for different latency requirements.
Other Grok Models
Evaluation Benchmarks
Rank
#33
| Benchmark | Score | Rank |
|---|---|---|
Reasoning LiveBench Reasoning | 0.80 | ⭐ 6 |
Agentic Coding LiveBench Agentic | 0.49 | 18 |
Coding LiveBench Coding | 0.70 | 29 |
Web Development WebDev Arena | 1235 | 31 |
Mathematics LiveBench Mathematics | 0.62 | 32 |
Rankings
Overall Rank
#33
Coding Rank
#52