Tencent Hunyuan Hy4 Preview: 770B-Parameter Open Model With 49B Active and Native 1M Context
TencentHunyuan · x · 2026-09-09
Tencent Hunyuan amplified a developer demo of Hy4 preview: an open model with 770B total parameters, 49B active per token, native 1M-token context, Apache 2.0 license, official FP8 weights, and direct vLLM and SGLang support.
In the demo, Hy4 generated a colorful, playable 2D space shooter from a single prompt, complete with controls, enemies, particle effects and score tracking. The author notes it's still a preview and recommends benchmarking tokens/s against BF16/FP8 builds.
Related event: Tencent open-sources Hunyuan Hy4 preview with 1M context(2 posts)→
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