
China's Moonshot ships largest-ever open AI model

Beijing-based Moonshot AI unveiled Kimi K3 on 17 July, a 2.8 trillion-parameter open-weight model the company says matches or beats several leading American systems, at a fraction of the price. The release landed on the eve of Shanghai's World Artificial Intelligence Conference. Moonshot, backed by Alibaba Group Holding and Tencent Holdings, built K3 as the flagship of a three-tier lineup that also includes K2.7 Code, a specialised coding model, and K2.6, a general-purpose option.What K3 actually doesK3 is the largest open-weight model released by anyone to date at 2.8 trillion parameters, more than double the size of its predecessor, Kimi K2, which shipped at 1 trillion parameters in July 2025. Context windows across the three-model lineup run to 256,000 tokens or above, and K3 offers the full 1-million-token version, enough to process an entire codebase or a lengthy document in a single pass. Moonshot claims K3 performs competitively against Anthropic's Fable 5 and beats OpenAI's GPT-5.6 on several published benchmarks, though those figures come from the company itself. An independent ranking on Arena.AI reportedly put K3 at the top of current model performance. The model shows particular strength in front-end







