From the source
Tencent open-sourced Hy4 preview, a large language model with 770 billion total parameters, 49 billion activated parameters, and a context window exceeding 1 million tokens.
- The model is available through WorkBuddy, CodeBuddy, Yuanbao, and ima, with API access via Tencent Cloud TokenHub and OpenRouter.
- In internal evaluations, it scored 2.99 out of 4, outperforming GLM 5.3 and Kimi K3, and helped optimize training and inference systems.