Tencent officially launched Hy3, a hybrid fast-and-slow-thinking model built on a Mixture-of-Experts (MoE) architecture, with 295 billion total parameters and 21 billion active parameters, supporting a context length of up to 256K. Compared with the preview version, Hy3 delivers greater stability and cost efficiency, achieving intelligence comparable to flagship models with two to five times its parameter scale. Hy3 has been adopted across Tencent products including WorkBuddy/CodeBuddy, Yuanbao, Marvis, and ima, with its API now available on Tencent Cloud TokenHub. Its preview version launched on 23 April. Since the launch of Hy3 preview, average daily token consumption has increased twenty-fold, and the number of WorkBuddy users who actively select Hy3 preview has grown sixfold. Hy3 makes progress in productivity tasks such as software development, office productivity, financial modeling, front-end design, and game production.