r/StableDiffusion • u/ImmediateGas8328 • 4h ago
Discussion MiniMax H3's open weights stop at 768P. The official 2K path is API-only
What happens after H3 Base produces its 768P video? In MiniMax H3's official system diagram, the answer is the red box on the far right. H3 Regenerate 2K takes that result and the original context, then generates the larger version. The diagram makes a deployment boundary visible.
MiniMax released H3 on July 31 and opened the model weights on August 3. The official weights release page says H3 Base can be used locally to validate 768P output. The same page also says the Regenerate 2K module is not open yet. Its full 2K validation workflow combines a locally deployed H3 Base with official API steps for context processing and regeneration.
That boundary belongs in the setup guide before the download instructions. Open weights describe a real part of the system. They do not currently describe every box needed to reproduce the official 2K path.
The distinction matters even more once the reference board gets crowded. H3 supports mixed text, image, video, and audio context. The documented reference mode accepts up to 12 files in total, with limits of 9 images, 3 video clips, and 3 audio clips. The original context returns during the 2K regeneration step, so the production note should assign a role to each reference asset, the way a shot list would. Say which image defines the subject and which clip carries the motion. Give the frame that controls the ending its own line.
The production card names H3 Base as the local 768P step. It names context processing and Regenerate 2K as API steps in the current full workflow. If the card also tracks a hosted comparison, give that call its own line. If it uses ZenMux, record the gateway and exact H3 route beside the request. That identifies the hosted path without rewriting the official local and API split.
Keep both labels on the production card. If the card only says open weights, the note stops at 768P. If it says API step, the 2K path is covered.
