Grok 4.3
Parameters
-
Context Length
1M
Modality
Multimodal
Architecture
Dense
License
Proprietary
Release Date
30 Apr 2026
Knowledge Cutoff
-
Technical Specifications
Attention
Attention Structure
Multi-Head Attention
Attention Heads
-
Key-Value Heads
-
Attention Head Dimension
-
Position Embedding
Absolute Position Embedding
RoPE Theta
-
Sliding Window Attention
-
Sliding Window Size
-
Normalization
-
Activation Function
-
Dimensions
Hidden Dimension Size
-
Number of Layers
-
FFN Intermediate Size (Dense)
-
Multi-Token Prediction Heads
-
Tokenizer
Vocabulary Size
-
Grok 4.3
Released April 30, 2026 by xAI, Grok 4.3 is a powerful reasoning architecture featuring a 1M token context window and massive gains on instruction-following (81.3%) and scientific computing benchmarks. Optimized for complex multi-step programmatic investigations.
About Grok 4
xAI's frontier intelligence models trained with reinforcement learning at unprecedented scale using the 200,000 GPU Colossus cluster. Grok 4 series demonstrates state-of-the-art performance in reasoning, coding, and multimodal understanding with native tool use capabilities. Features real-time search integration across X and the web, advanced reasoning through scaled RL training, and industry-leading performance on academic benchmarks. Designed for both immediate responses and extended thinking modes with vision capabilities.
Other Grok 4 Models
Evaluation Benchmarks
Rank
#37
| Benchmark | Score | Rank |
|---|---|---|
General Text Text Arena | 1451 | 25 |
Web Development WebDev Arena | 1369 | 50 |
Rankings
Overall Rank
#37
Coding Rank
#60