Step-Video-T2V shows sizes only in its table
The two pixel sizes on these pages, 768px768px and 544px992px, are the configurations the memory table was measured at. They are the only output sizes stated, and they arrive attached to gigabytes rather than to a specification. As of 2026-09-22.
| Column | What the pages state |
|---|---|
| Resolution, in the vendor's own words | 768px768px and 544px992px |
| The detail published beside it | Stated as the memory table's configurations |
| Hardware, from the same pages | 78.55 GB peak at 768px768px204f |
| Length, from the same pages | Up to 204 frames |
Inclusion rule. The value this page is about, the detail the vendor attached to it, and the two columns that change how it should be read. A column the vendor left empty keeps its row and says so. Order. This column first, then its detail, then the two columns that qualify it.
1A square and a portrait frame
768px768px and 544px992px are different shapes, not two points on one scale. Publishing both means both were exercised, which is more than a single figure would establish.
What it does not establish is whether anything between or beyond them works, because neither was presented as a supported size.
2The memory spread across them is narrow
78.55 GB at the square setting with 204 frames, 77.64 GB at the portrait setting with the same frames, 72.48 GB at the portrait setting with 136. Changing the frame shape barely moves the requirement.
For a thirty billion parameter model that is expected: the weights dominate, and the frame is a small part of the total. It also means output size is not the lever for fitting this model onto a smaller card.
3Frames without a rate, again
The 204 frame ceiling has no frame rate attached anywhere in the repository, so the output sizes cannot be turned into a clip length in seconds.
The resolution and length columns here are both populated from the same table, which makes the entry coherent and leaves the specification a reader would want unwritten.
- Hardware78.55 GB peak GPU memory at 768px768px204f, 77.64 GB at 544px992px204f and 72.48 GB at 544px992px136fstated per configuration at batch size one
- Model size30 billion parametersfrom the repository's own introduction
4Sources
Output sizes above appear on github.com/stepfun-ai, checked 2026-09-22. The full entry is at this family's page; what counts as a stated size is on resolution. Nearby: 256px and 768px, 576x1024 from training.