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Hy4 preview Is Now Available on WorkBuddy for Work and Coding Tasks

August 30, 2026
Artificial Intelligence
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Tencent’s 770B open-weight Hy4 preview is now selectable inside WorkBuddy, the company’s desktop AI agent for office and coding work, and it is free there until 10 September 2026. This piece covers what the integration changes for daily work, how the model switch works and what it is recommended for, the 163-expert blind test that Tencent ran inside WorkBuddy against GLM 5.3 and Kimi K3, the benchmarks that matter for work and coding tasks, the quota and reasoning-time caveats, the API and local GGUF routes for teams that would rather not use the app, and how WorkBuddy compares with Claude Cowork.

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Tencent Releases Hy4 preview: An Open-Weight MoE Model With a 1M Context Window

August 28, 2026
Artificial Intelligence
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Tencent open-sourced Hy4 preview on 28 August 2026 under Apache 2.0: a 770B Mixture-of-Experts model that activates just 49B parameters per token and reads a one-million-token context window. This breakdown covers the full architecture, from 256 routed experts per layer to Gated DeepSeek Sparse Attention and the built-in speculative decoding layer; every benchmark figure Tencent published, including the 163-expert blind evaluation against GLM 5.3 and Kimi K3; the API price list against GPT-5.6 Sol; the eight-GPU serving recipes; and the four caveats worth naming before any of it reaches production.