Any update on Quant versions ? FP8 ?

#4
by PushkarHF1 - opened

Any update on Quant versions ? FP8 ?

JD.com Open Source org

FP8 is already the default execution path β€” it just happens at load time rather than as a separate checkpoint:

  • the released weights are bf16 (dit/joyai_video_edit_dit_0811.pth, ~32.5 GB);
  • at startup every DiT Linear is quantized to FP8 e4m3 (per-output-channel weight scales + per-token activation quantization) and runs through the cutlass FP8 GEMM in deploy/joyomni_ops; JOYOMNI_FP8_IMG=1 / JOYOMNI_FP8_TXT=1 are the defaults;
  • with JOYOMNI_LOW_VRAM=1 the weights are staged to the GPU block-by-block and quantized as they land, so the full bf16 model is never GPU-resident β€” that's how it runs on a single RTX 5090 (32 GB): ~21.5 GiB steady at 840Γ—480 @ 24 FPS (see DEPLOYMENT.md);
  • optional INT8 attention on GeForce via SageAttention (JOYOMNI_SAGE_ATTN=1).

A pre-quantized FP8 checkpoint would mainly cut the download/disk footprint (~32.5 GB β†’ ~16 GB), not VRAM or inference speed β€” the runtime already gives you those. It's not on the short-term roadmap, but if the download size is the main pain point for you, that's useful signal β€” let us know.

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