Tencent Hy4 Preview: A 770B Open Model That Builds a Game from One Prompt

Tencent Hy ·

Key Info

Tencent's Hy4 preview is a 770B-parameter open model with 49B active parameters per token, native 1M context, Apache 2.0 licensing, direct vLLM and SGLang support, and official FP8 weights. The model is shown generating a fully playable 2D space shooter—with controls, enemies, particle effects, and score tracking—directly from a prompt.

Highlights

  • Massive but efficient: 770B total parameters with only 49B active per token.
  • Native 1M context and Apache 2.0 license, plus official FP8 weights and direct vLLM/SGLang support.
  • Demo shows Hy4 building a playable 2D space shooter from a single prompt.
  • Currently a preview; users are encouraged to benchmark tokens/s and compare BF16/FP8 variants.
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