Kimi K3 is a native multimodal Mixture-of-Experts model released by Moonshot AI with 2.8 trillion total parameters, 104 billion active parameters, and a one‑million‑token context window. It incorporates hybrid attention, Stable LatentMoE, long‑horizon reinforcement learning, a dedicated serving stack, and claims superior benchmark performance over Claude Opus 4.8. The model’s weights are available on Hugging Face for further research and deployment.