On July 17, Chinese AI startup Moonshot AI officially launched its new-generation large model, Kimi K3, boasting 28 trillion parameters—the largest open-source model globally to date. The model natively supports visual understanding and features a 1 million-token context window, optimized for complex task scenarios such as software engineering, knowledge work, and in-depth research. Official evaluations show that Kimi K3's comprehensive intelligence level ranks just below top closed-source models like Claude Fable 5 and GPT-5.6 Sol, excelling in programming, visual understanding, and long-term task processing. Its training employs a self-developed underlying architecture and scientific training methods, leveraging synergistic optimizations in model architecture and training techniques to translate scale advantages into enhanced capabilities. The release of Kimi K3 marks a new step forward in the development of China's AI models, with its low-cost, high-performance characteristics poised to accelerate the popularization and application of AI technology.