Grok Imagine publishes a ladder and names a default

The docs publish 1080p, 720p and 480p for the resolution parameter and state that 480p is the default. Most pages in this column publish a ladder without saying where a request lands if nobody chooses, and where a default is named it is rarely the bottom rung. As of 2026-09-22.

Inclusion rule. Parameter values this page documents for resolution and shape, including the defaults it names. A value offered in a user interface but absent from the parameter list is not recorded. Order. The ladder, then the defaults that sit inside it.

1A named default is a specification, not a detail

An unspecified parameter is still a parameter. Where the page names the value a request falls back to, the fallback becomes checkable; where it does not, a pipeline that forgets the field produces output nobody can predict from the documentation.

This row names two: the bottom resolution rung and sixteen by nine for shape. Both are the cautious choices, which is what a default should be, and both mean an incomplete request returns something usable rather than something expensive.

2480p at the bottom sits against a published pixel floor

The surface in this register that publishes minimum dimensions accepts vertical ads from 540x960 upward. A 480p rung is a short-side figure and a 480p vertical frame is 480 pixels wide, which sits just under that floor, so the cheapest rung and the vertical minimum are close enough that the tier choice is a real one rather than a formality.

On most rows here the cheapest rung clears every published floor comfortably and the resolution column stops mattering. This is one of the few where a plan has to look at the number rather than assume it.

3Three rungs with no length attached to any of them

Neither the ladder nor the default is tied to the duration range on this page. One to fifteen seconds is available at each rung, which separates this row from the two entries that make their longest run conditional on a tier.

That independence is what makes a cheap draft useful here. A composition can be settled at 480p at its final length and re-requested at 1080p without anything about the timing changing, which is not true on the rows where the columns are coupled.

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.

• Resolution parameter
  1080p, 720p and 480p, with 480p the defaultxAI docs, video generation / recorded 2026-09-22
• Aspect ratio parameter
  1:1, 16:9, 9:16, 4:3, 3:4, 3:2 and 2:3, with 16:9 the defaultxAI docs, video generation / recorded 2026-09-22

5Sources

Read from the xAI video generation docs, 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: Hedra, HeyGen.