Hy4 preview has been announced in a post from @TencentHunyuan, which lists the model at 770B, with 49B active, and a 1M context. The announcement presents Hy4 as built for productivity and as an open-source frontier effort, while asking users to try the preview and report what breaks.
Hy4’s announced model profile
The preview’s headline specifications are its 770B overall scale, 49B active figure, and 1M context. These details establish the basic profile Tencent Hunyuan wants users to evaluate, but the post does not present them as a complete performance assessment.
Productivity and open-source positioning
Hy4 is framed around productivity, alongside the announcement’s description of it as an open-source frontier model. The post also presents the model as having a consistent, affordable price. Because no price figure or usage terms are included in the announcement, that affordability claim remains positioning that readers will need to assess against the release details.
A preview intended for hands-on feedback
The call to action is direct: use the preview and tell the team what breaks. That signals that real-world testing and feedback are part of the preview’s purpose, rather than the announcement being only a specification release. The post directs interested users to the Hy blog, Hugging Face, and GitHub for more information and access.
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