NPCs and agents
Tencent Hy4: game-engine and Blender skills in a new model
Tencent has released Hy4, a large language model that can see images and operate software, trained on Blender and CAD and tuned for Unreal, Unity and Godot work. The API price is unchanged; the weights are promised in the coming days.
Tencent announced Hy4 on 4 November 2026, the full release of the flagship language model in its Hy (formerly Hunyuan) family. It is a text model, not a video or image generator, but two of its headline changes matter to people who build games: it can operate software, and Tencent says it was trained to work with game engines.
What is new
According to Tencent’s announcement, Hy4 adds three things over the Hy4 preview published in August:
- Visual understanding, for the first time: fine-grained image processing, chart analysis and visual reasoning.
- Computer use: it can work through command-line and graphical interfaces. Tencent says it had specialised training on professional software such as Blender and CAD, to plan and carry out long, multi-step tasks.
- Game development: working with Tencent Interactive Entertainment Group developers, Tencent says Hy4 integrates with Unreal Engine, Unity and Godot and now handles complex game logic and multiplayer code. On Tencent’s own benchmarks it improved by 19.1 per cent on GameDev and 9.8 per cent on GameLogic compared with the preview.
Tencent also reports that Hy4’s hallucination rate fell from 12.95 per cent to 7.2 per cent in internal tests, against the preview.
Access and price
Hy4 is available through Tencent Cloud TokenHub and Tencent products including WorkBuddy and CodeBuddy, and through third-party platforms such as OpenRouter, Hermes and OpenCode. The price is unchanged from the preview: about US$0.90 per million input tokens, US$2.70 per million output tokens and US$0.045 per million cached input tokens. Hy4 will be 50 per cent cheaper on TokenHub until 31 December 2026, and a cheaper Hy4 Flash is due “soon”.
Limits
- The weights are not out yet. Tencent says it “plans to release” the weights and system cards “in the coming days”. The only downloadable model today is the August Hy4 preview, a 770-billion-parameter mixture-of-experts model (49 billion active, 1M-token context) under the Apache 2.0 licence. The final model’s size and licence have not been published.
- The benchmark and expert-rating figures are Tencent’s own. We have not seen independent tests.
- Tencent’s preview card lists known issues, including reasoning for longer than necessary and over-checking its own work.
Our take
For interactive worlds, the interesting part is the agent angle. A model that can open Blender, drive an engine and write multiplayer logic is a step towards generators that build a playable game rather than describe one. That is the direction we trace in AI models as game generators. Until the weights land, treat Hy4 as a hosted API model, and judge its game claims on your own project.