3-second product hook: Seedance 2.5 bills 4 s, Wan 3.0 bills 3 s

A 3-second product hook on Sume's seedance-2.5 at 720p bills 4 seconds, because 4 seconds is that model's minimum: 4 times $0.5778 is $2.31. Wan 3.0 accepts 2 to 30 seconds, so the same hook at 720p costs 3 times $0.125, which is $0.375. The difference per hook is $1.94, and it grows if you test many hooks.

The minimums that decide it

Sume's video docs list seedance-2.5 at 4 to 30 seconds and wan-3.0 at 2 to 30 seconds. Other catalog models have their own floors: minimax-h3 accepts 5 to 15 seconds and gemini-omni-flash-1.1 accepts 3 to 10. The minimum billed length is part of the price, which is why a short hook cannot be priced as seconds times rate alone.

Hooks are short on purpose. Ad testing often means a dozen versions of the first three seconds, so a floor that rounds each one up to four seconds adds up.

Twelve hooks

Twelve 3-second hook variants at 720p cost 12 times $0.375, which is $4.50 on Wan 3.0 or Omni Flash, and 12 times $2.3112, which is $27.73 on Seedance 2.5. At 480p, Wan 3.0 is 12 times $0.1875, which is $2.25.

A 4-second hook on Seedance 2.5 costs the same $2.31, so if you pick that model for its look, use the full four seconds and trim the edit in the timeline rather than paying for one second you discard.

How to choose

Use a cheap model to settle the idea and spend on the final. Draft on Wan 3.0 at 480p, choose the best three, and render those on the model whose look you want. Seedance 2.5 and Wan 3.0 are different models, so a Wan draft predicts the framing and motion idea, not the exact pixels.

Query GET /v1/videos/models before submitting to read supported_durations for each model, then confirm rates in the catalog on the day you run.

A practical note

Hooks also change how you test. Run the same one-line idea as a text-only prompt and as an image-to-video call from a product photo, because the first frame decides how much of the three seconds is spent showing the product. Keep a note of the prompt, the model and the billed seconds beside each result, so that when one hook wins you can reproduce its cost for the final render. If a hook needs sound, remember that Gemini Omni Flash 1.1 always generates native audio, so its $0.375 includes a track you may want to replace.

Before you scale

Every price in this post is a Sume list price read from the public catalog on 2026-10-09, and the arithmetic is shown so you can redo it with your own counts. Rates can change, so re-read the catalog before a large batch and run a small test first. Sume bills the job's captured amount, and the job result tells you what was used, so compare the first run's receipt with your estimate before you scale the work to the full set.