Tencent's Hy4 adds vision and computer use — but long-task reliability is the open question
Traditional_Air319 · reddit · 2026-11-05
Tencent released Hy4 with two headline additions: first-time image and complex chart understanding, plus computer use across CLI and GUI, with specific training for tools like Blender and CAD.
The author raises three questions worth real-world testing:
- Error recovery: when a button moves, a permission pop-up interrupts, or a command fails mid-task, can the model diagnose and recover?
- Cost: every failed action, retry, and screenshot means more tokens and API calls — costs compound over long workflows.
- State tracking: an agent may complete several steps correctly, then lose track or assume something worked when it didn't — individual actions vs. full workflows are different things.
The author invites others to put Hy4's computer use to real-world tests.
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