Kimi K3
Moonshot's 2.8T open-weight MoE flagship — the largest open model to date, with native vision, always-on thinking, and #1 frontend coding performance
Kimi K3
Moonshot AI • July 2026
Training Data
Not disclosed
Kimi K3
July 2026
Parameters
2.8 trillion (~50B active)
Training Method
Sparse MoE (896 experts, 16 active), Kimi Delta Attention, Attention Residuals, Quantile Balancing
Context Window
1,000,000 tokens
Knowledge Cutoff
Not disclosed
Key Features
Largest Open-Weight Model (2.8T) • Always-On Thinking Mode • Native Vision • Open Weights
Capabilities
Coding: Outstanding
Agentic: Outstanding
Long Context: Outstanding
What's New in This Version
Scales from K2.6's 1T to 2.8T total parameters and 256K to 1M context; leads the Frontend Code Arena and scores 90.4 on 1M-token retrieval, narrowing the gap to Claude Fable 5 and GPT-5.6 Sol
Moonshot's 2.8T open-weight MoE flagship — the largest open model to date, with native vision, always-on thinking, and #1 frontend coding performance
What's New in This Version
Scales from K2.6's 1T to 2.8T total parameters and 256K to 1M context; leads the Frontend Code Arena and scores 90.4 on 1M-token retrieval, narrowing the gap to Claude Fable 5 and GPT-5.6 Sol
Technical Specifications
Key Features
Capabilities
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