Moonshot AI Launches Kimi K3, a 2.8-Trillion-Parameter Open-Weight Model, With Full Weights Due July 27

Moonshot AI has released Kimi K3, a 2.8-trillion-parameter open-weight model that the Beijing-based startup bills as the world's first open model in the 3-trillion-parameter class, with the full trained weights scheduled for public download on July 27, 2026. The model went live in mid-July across the company's API and its Kimi app, Kimi Work and Kimi Code products, positioning it as a direct challenge to leading closed systems from U.S. rivals.