Tencent releases 770B Hunyuan MoE model Hy4 with computer-use capabilities on OpenRouter

On 4 November 2026, Tencent released Hy4, the latest addition to its Hunyuan model family. Hy4 is a 770B parameter mixture-of-experts (MoE) model with 49B active parameters per token and a 1 million token context window. It is the first model in Tencent's Hunyuan line to combine visual understanding with computer operation capabilities, enabling it to read screens, click interface elements, and run commands across applications. According to the announcement, the model is already accessible through an API, though its weights have been promised but not yet released. It is currently available on OpenRouter, a model routing service that provides unified access to multiple AI models through a single API. The release marks a shift for Tencent toward building models that can interact with graphical interfaces and perform tasks across different applications without human intervention. Tencent has not published any details about training data, benchmark scores, licensing terms for the weights, or pricing for the API beyond noting the model is live.