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Machine Learning

Kimi K3: Open Frontier Intelligence

Kimi Team

Featured August 8, 2026

Original Paper

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Simply

A new AI model combines smart ways to handle long text and images, using specialized mini-networks that stay stable and share work fairly, making it much more efficient and powerful.

In depth
The paper introduces Kimi K3, a 2.8T parameter Mixture-of-Experts (MoE) model with native vision and a 1-million-token context window. It achieves a 2.5x improvement in scaling efficiency through Kimi Delta Attention (KDA) for efficient long-sequence mixing, Attention Residuals (AttnRes) for selective information flow across depth, and Stable LatentMoE with SiTU-GLU and Quantile Balancing for robust sparse channel mixing and load balancing.

Key Takeaways

  • 1
    The Kimi K3 model integrates Kimi Delta Attention (KDA) with a novel lower-bounded decay mechanism, enabling efficient long-context processing by allowing dense Tensor Core computations for all causal tiles.
  • 2
    The architecture incorporates Attention Residuals (AttnRes), which allows each layer to selectively retrieve representations from all preceding layers, significantly enhancing information flow across network depth.
  • 3
    A Stable LatentMoE module, featuring SiTU-GLU activations for stability and Quantile Balancing for expert load distribution, facilitates efficient sparse channel mixing with 896 experts and 16 active per token.

Conceptual Flow

HIGH LEVEL
1
Methodology: How Kimi K3 Processes Information

The model uses special attention and expert systems to efficiently handle very long texts and images, making sure all its parts work together smoothly.

Input Text
Input Image
Process and Understand
Long Context Attention
Deep Layer Connections
Specialized Mini-Networks
Unified Understanding
2
Results: What Kimi K3 Achieved

The new design makes the model much more efficient, allowing it to perform complex tasks like coding and reasoning better than many other advanced AIs.

Old Model Efficiency
Old Model Performance
2.5x Improvement
New Model Efficiency
Top-Tier Performance
Complex Task Mastery