Shortest clip each Sume video row accepts, from 2 s Wan to 5 s H3

The shortest clip on Sume is 2 seconds on Wan 3.0; Gemini Omni Flash 1.1 and sume/auto start at 3, most other rows at 4, and the MiniMax and Recast rows at 5. That matters when a launch-week model such as Vidu Q4 Preview advertises a 3-second floor and you want to know which Sume rows can match it.

The ranges come from the catalog in the repo and from Video Generation; confirm live values in supported_durations.

The ladder

This table lists each row's minimum and the billed price of that minimum at the cheapest resolution, using the list rate in the repo times 1.25. Seedance rows are billed on video tokens, not on a flat per-second rate, so they appear without a computed price.

Rows with a different shape

Three rows do not fit a plain minimum. H3 Max Recast needs a source video of 5 to 30 seconds, and the duration you send is that source length rounded up. Genjutsu Motion Transfer accepts 4 to 30 seconds and is in the catalog only when its provider is configured. Veo 3.1 accepts only 4, 6 or 8, so its floor is also its first step.

Using the floor in practice

Short clips are cheap, but a short floor is not the same as a short best price. Two cases show why:

• A 2-second logo sting fits Wan 3.0 at $0.125 billed at 480p, or Omni at 3 seconds and trim to 2 in the timeline.
• A 4-second loop is cheapest on Grok at $0.05, but only from a still.
• A 5-second text-only B-roll can go to MiniMax H3 at $0.3125 at 480p, or to Wan at $0.3125 for the same 5 s at 480p, so the choice is about look, not price.

How to read it in code

Do not copy this table into your app. Read supported_durations from GET /v1/videos/models and compare it to your request before you submit. A request below the minimum fails validation before any balance is reserved, so it is a quick error, not a charge.