Runway publishes pixel pairs instead of tiers

The input reference publishes seven pixel pairs rather than a resolution ladder: 1280:720, 1584:672, 1104:832 landscape, 720:1280, 832:1104, 672:1584 portrait and 960:960 square. One field carries both the size and the shape. As of 2026-09-22.

Inclusion rule. Values the image-to-video ratio field accepts according to this reference. The pairs are recorded as printed and are not converted into named tiers or named ratios. Order. As the reference groups them: landscape, portrait, then square.

1A pair collapses two columns into one

Every other row in this register answers size in one place and shape in another, and a buyer reads two cells. Here one field settles both, which is tidier to request against and harder to compare, because neither the resolution column nor the shape column has a value to line up beside the rest.

This register keeps the pairs as printed in both columns rather than deriving tiers and ratios from them. The arithmetic is easy; the point is that the vendor did not publish the result of it, and a derived figure would carry the same check date as a read one.

2The transposition is exact, which says something useful

Each landscape pair has a portrait twin with the numbers swapped. That symmetry means a campaign can be planned in shapes rather than in sizes, and the vertical version of a widescreen placement is the same request with two values exchanged.

It also bounds the output more tightly than a ladder would suggest. The largest long side on the page is 1584 pixels, which is under 1080p on its long axis, so this row sits lower in the column than a tier name would have implied.

3What the field is documented for matters

The pairs are published for the image-to-video path, where an input frame already has a shape. That is the path most serial advertising uses, because a conditioning frame is how a cast holds its appearance between separately generated pieces.

So the field is not an afterthought on this row: it is the interface a campaign actually meets. The register records it in the shape column and the size column alike, and marks in both that the figure is a pixel pair rather than a name.

4Where this cell sits in the column

Inclusion rule. Every generator in the register, carrying the resolution figure its own page prints, whether that is a ladder, a range or a single pair of numbers. Order. Alphabetical by generator name.

• Gen-4.5 image-to-video
  Landscape 1280:720, 1584:672 and 1104:832, portrait 720:1280, 832:1104 and 672:1584, square 960:960shape given as a pixel pair rather than a ratioRunway API, input parameters / recorded 2026-09-22
• Gen-4.5
  Durations are 5-15 seconds on Gen-4.5, for text-to-video and image-to-video alikestated per endpointRunway API, input parameters / recorded 2026-09-22

5Sources

Read from the Runway API input reference, checked 2026-09-22. The column itself is described on resolution, and the rule that keeps surfaces and generators apart is on method. Next along this column: Vidu, Wan 3.0.