Chinese AI startup Moonshot AI released Kimi K3 on July 16, 2026, a 2.8-trillion-parameter open mixture-of-experts model it describes as the largest open-source AI model in the world, with full model weights scheduled for release on July 27. The model features a 1-million-token context window and native visual understanding, and Moonshot says it performs competitively with rivals such as Anthropic’s and OpenAI’s flagship systems on coding benchmarks. K3 is priced at $15 per million output tokens, positioning it between cheaper Chinese open-weight models and costlier US frontier models.
