Tencent's flagship AI model just got eyes and hands. Hy4, released in full on November 4, is the first model in Tencent's Hunyuan line that can see — reading images, charts, and visual reasoning problems — and the first that can use a computer, operating command-line tools and graphical interfaces on its own. It was even trained on professional software like Blender and CAD tools.
There's a catch, and it's the whole story: the weights aren't out. Tencent says it plans to release the model weights and a system card "in the coming days," with no date and no license stated for the final version. That's a sharp break from the August preview, which shipped its weights on Hugging Face the same day under Apache 2.0. Until the full release's weights land, Hy4 is a hosted API wearing an open-weight label — available through Tencent Cloud TokenHub, OpenRouter, and Tencent's own apps, but not something anyone outside the company can download, run, or fine-tune. A lighter Hy4 Flash is also "scheduled for release soon."
The model is the same 770-billion-parameter mixture-of-experts design as the preview, with 49 billion parameters active per token and a one-million-token context window. Tencent's numbers say the upgrade is real: a finance evaluation with 213 professionals across 579 real-world tasks put Hy4 first among open-weight models at 3.04, ahead of DeepSeek-V4.1-Flash-1017 at 2.97 and Kimi K3.1 Pro and GLM-5.3 at 2.68 each. One number worth a raised eyebrow: Tencent's two English announcements disagree on how much the hallucination rate fell — 15.76 to 5.45 percent in one, 12.95 to 7.2 percent in the other.
Pricing is unchanged — about $0.83 per million input tokens and $2.50 per million output — with a 50 percent TokenHub discount through December 31 and free use in WorkBuddy and CodeBuddy from November 4 to 15. That puts Hy4 squarely in the open-weight price war with DeepSeek, Z.ai, and Alibaba, all racing to be the cheap, capable default for developers who don't want to rent a closed model.
What to watch is simple: whether the weights actually arrive "in the coming days," and under what license. The preview proved Tencent will ship open weights on day one when it wants to. The full release is the test of whether that was a strategy or a preview.