Tencent Hy4 preview is here. 770B total parameters. 49B active per token. 1M-token context. 78 layers. 256 routed experts + 1 shared expert. Top-8 routing. And the weights are open under Apache-2.0.

Daily AI Roundups | 28 Aug 2026 16 AI stories covering open-weight models, hardware standards, custom chips, cloud financing, AI memory, funding, cyber defense and research.

刚刚，腾讯开源：Hy4 preview，差异化主打对齐真实工作场景 直接对着“写代码、做游戏、干财务、跑科学模拟”四个真实工作场景优化，总参数770B、激活49B，上下文1M 亮点是递归自我改进闭环，模型开始参与训练它自己了 Hy4 preview这次首次参与了自身研发迭代，自己提改进方案、跑实验、根据结果调整（训练方法、数据策略、算子优化），形成了自我改进闭环 #Hy4preview…

Tencent’s Hy4 preview is out🚀🚀🚀 770B total / 49B active parameters 1M-token context Gains across software engineering, office analysis, game development and scientific research. API pricing / 1M…