Helios is a 14-billion-parameter video model that can make minute-long videos in real time at about 19.5 frames per second on a single NVIDIA H100 GPU.
The paper fixes a hidden mistake many fast video generators were making when turning a "see-everything" model into a "see-past-only" model.
MemFlow is a new way for AI to remember the right parts of a long video story while it keeps making new parts, so characters and scenes stay consistent.