Hy4 preview
A 770B parameter open-weights frontier model with 1M context window.
Live drop
Tencent (Hunyuan)Dropped Aug 28, 20266 builds6 makers
770B MoE open-weight model with 1M context optimized for long-horizon coding, office work, and scientific research.


About this release
Next-generation Hunyuan MoE (770B total parameters, 49B active per token) with >1M-token context. Major gains in software engineering, multi-document office workflows, data analysis, game prototyping, and research iteration. Open-sourced on Hugging Face with weights, deployment guidance, and internal blind evaluations showing slight edges over GLM-5.3 and Kimi K3 on 203 engineering tasks. Available via Tencent Cloud, OpenRouter, and integrated Tencent apps.
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