Tencent Hunyuan has released Hy4, its latest-generation large language model, which introduces visual understanding and supports computer operation for the first time. According to ChainCatcher, Hy4 is available through Tencent Cloud Tokenhub, WorkBuddy, CodeBuddy, Yuanbao, the Dayuan AI assistant in WeCom, and ima; its API is also integrated with OpenRouter, Hermes, and OpenCode. Compared with Hy4 Preview, Hy4 uses more data and larger training scales in pretraining and post-training, and improves instruction following, long-context understanding, and long-horizon agent capabilities.