Kimi K3 Open-Sourced Weights Deployed, Competition Among Chinese Open-Source Large Models Heats Up Again

On July 27, 2026, Mooncake AI officially released the full model weights of Kimi K3. As the world's first 2.8T-parameter open-source MoE model, it supports 1 million-token context window and native multimodality. The single post on Hacker News gained over 600 upvotes, sparking heated discussions in the community regarding its performance comparison with Claude Fable 5 and the distillation controversy. This article sorts out the architecture specifications, benchmark positioning, the background of Alibaba's 36% shareholding, as well as developer guides for API and local deployment of Kimi K3.