NVIDIA labs open-source Open-H3-Regenerate-2K v2: 2K video upscale in 22s on B200
fallengt · reddit · 2026-11-09
NVIDIA labs released Open-H3-Regenerate-2K-IC, an open latent video upscale/regenerate model (v2) on Hugging Face and GitHub.
- Better face & text consistency with the source video vs v1
- Uses H3 Ref2VA instead of fl2va; Turbo/Regenerate/LMS LoRAs no longer merged, now Hyperflow 8-step LoRA
- New 3/4/8-step samplings; Fast VAE-v2 fixes v1's grid artifacts in ComfyUI
- Chart shows 22.45s on a single B200 vs 112.7s via the H3 API, supporting 768P→4K
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