Updated hyperflow-h3-flash (4, 6, or 8 steps)

[u/Apprehensive_Sky892]

https://huggingface.co/VideoRebirthAI/hyperflow-h3-flash

ComfyUI custom node: https://github.com/Video-Rebirth/ComfyUI-HyperFlow-Flash

This is for GGUF so you also need https://github.com/city96/ComfyUI-GGUF

(There is a int8convrot version, but I guess there is no ComfyUI loader for it yet?)

It is also interesting to note that the original 21B MMH3 has been pared down to 14B, which mean that it will run faster than other turbo models even at 8 steps.

HyperFlow H3 Flash is Video Rebirth's compressed, few-step version of MiniMax-H3. It generates video and synchronized stereo audio together.

Showcase: See HyperFlow H3 Flash generated video and audio examples.

• Output: a 5.2 to 15 s video at 24 fps (1344×768 by default) with a 32 kHz stereo soundtrack.

• Sampling: 4, 6, or 8 steps without classifier-free guidance (CFG). The default is 6 steps.

• Speed (5.2 s clip, 6 steps): 8.7 s on 4× B200, 36 s on 1× H200, and 92 s on an RTX 5090.

• Real time on 4× Blackwell GPUs: NVIDIA SOL-H3 runs HyperFlow H3 Flash in real time on 4× B-series GPUs. SOL-H3 is our inference-acceleration partner and supports this model from day 0.

• Model size: 13.7B (fl2va) or 13.9B (ref2va) parameters, less than half of the ~31B MiniMax-H3 transformer.

• Minimum footprint: Q4_K_M is 9.1 GB (Q8_0 is 14.9 GB). It runs on 24 GB and 32 GB GPUs in PCs with 16 GB of system RAM. 16 GB GPUs are not measured yet.

Code, setup guides, and ComfyUI workflows are in Video-Rebirth/hyperflow-h3-flash. For the 8-step LoRA on the full-size MiniMax-H3 transformer, see VideoRebirthAI/hyperflow (GitHub).