Kimi K3 Open Weights Are Live: 2.8 Trillion Parameters and the New Open Source AI Frontier Let me be direct with you. On Sunday, July 27, Beijing-based Moonshot AI released the full open weights for Kimi K3 — a 2.8 trillion parameter mixture-of-experts model that is, by a wide margin, the largest open-source AI model ever built. The weights went live on the same day the company promised them...