GoKawiilTencent open-sources Hy4 preview LLM with 770B parameters and 1M-token context
Tencent has released Hy4 preview, a large language model with 770 billion total parameters, 49 billion active parameters, and a context window over 1 million tokens, aimed at coding, office and research tasks. The model is open-source and also accessible via Tencent's WorkBuddy, CodeBuddy, Yuanbao and ima apps, plus API access through Tencent Cloud TokenHub and OpenRouter, with free trials offered for two weeks.
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The release intensifies competition among open-source frontier models, with Tencent claiming Hy4 preview edges out rivals like GLM-5.3 and Kimi K3 in internal expert evaluations on engineering tasks. By tightly integrating the model with its own productivity tools, Tencent is positioning Hunyuan as a practical alternative for enterprise coding and office workflows, not just a research benchmark.
- Hy4 preview has 770B total parameters, 49B active parameters, and a 1M+ token context window
- It scored 2.99/4.00 in an internal blind test, ahead of GLM-5.3 and Kimi K3
- Available free for two weeks via WorkBuddy and CodeBuddy, plus API access through Tencent Cloud and OpenRouter
Source: tencent.com, 2026-08-29
Published there as: “Tencent Releases and Open-Sources Tencent Hy4 Preview”
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