MoonshotAI Ships Kimi K3, First Open 3T-Class MoE Model

Moonshot released Kimi K3, an open-weights 2.8 trillion parameter mixture-of-experts model, claiming 2.5x scaling efficiency over its predecessor through architectural innovations including Kimi Delta Attention and Stable LatentMoE. The release includes open-source infrastructure (attention kernels, MoE communication library, agent environment tools) alongside model weights, potentially lowering deployment barriers for trillion-scale MoE systems.

This Wire brief sits within Fusion42's coverage of AI Frontier Models, and 34 sources have reported it between 18 Jul 2026 and 7 Aug 2026.