
Tencent Launches Hy4 Preview: A 770B Parameter Open-Source Model with 1M Token Context for Global Productivity
Tencent has officially released and open-sourced the Hy4 Preview, a next-generation large language model (LLM) designed to handle complex, real-world productivity tasks. Boasting a massive architecture of 770 billion total parameters and 49 billion active parameters, the model features a context window exceeding 1 million tokens. Developed through deep co-design with industry experts in fields such as software engineering, finance, and gaming, Hy4 Preview has demonstrated superior performance in coding, office work, and scientific research. In internal blind evaluations, it outperformed notable competitors like GLM-5.3 and Kimi K3. The model is now available globally via open-source channels, Tencent's productivity suite including WorkBuddy and CodeBuddy, and API platforms like Tencent Cloud TokenHub and OpenRouter, marking a significant advancement in the open-source AI landscape.








