4-second hook at 720p: Wan $0.50, Omni $0.50, Seedance 2.5 $2.31

The comparison

A 4-second hook is the shortest clip that three of the four new models accept on Sume. seedance-2.5 starts at 4 seconds, wan-3.0 at 2, and gemini-omni-flash-1.1 at 3. minimax-h3 starts at 5 seconds, so it is not a 4-second option. Prices below use Sume's rate table at 720p, with the provider list times 1.25 (Video Router docs).

Why Seedance 2.5 is higher

Seedance bills by video tokens, not by a flat per-second rate. At 24 frames per second and 1280x720 a second is about 21,600 tokens, and at Sume's list rate of $0.0214 per 1,000 tokens with the 1.25 factor that is about $0.58 a second. That buys features the others do not match on the vendor page: ByteDance lists up to 30 images, 10 video clips and 10 audio clips as references per pass (read 2026-10-05).

What 4 seconds does not give you

• Omni Flash always renders native synced audio; the API rejects generate_audio: false.
• None of these models accepts seed, so you cannot reproduce a take at another resolution.
• A 4-second hook is the same price whether it is a hook or a throwaway; send a prompt and cap spend per run.

Pick by the job

For plain 720p hooks at the lowest cost, Wan 3.0 or Omni are equal at $0.50; choose by look and by whether you want audio. Reach for Seedance 2.5 when the brief needs its reference stack or you will extend to 30 seconds. Check the live pricing_skus before a batch.

A worked batch

Fifty hook variants at 4 seconds and 720p cost 50 x $0.50 = $25.00 on Wan 3.0 or Omni Flash, and about $115.55 on Seedance 2.5. Because a hook is judged on the first second, many teams draft a large number and keep a few. If you keep five, then re-render those five at 1080p, add 5 x 4 x $0.25 = $5.00 on Wan, or 5 x 4 x $0.1875 = $3.75 on Omni.

Do not forget the reserve. Fifty jobs on a Pro plan are accepted as 4 processing and up to 20 queued, 24 at a time, with their estimates held together.

Limits that bite on a short clip

Seedance 2.5 has a floor of 4 seconds, so 4 is the shortest it can do. Wan 3.0 can go down to 2 seconds, which makes it the only one of the four that can do a 2 or 3 second sting at $0.25 or $0.375. Omni accepts 3 seconds at $0.375 at 720p. H3 has a 5-second floor.

If the creative requires a 3-second beat, the model list narrows to two.

The cost gap between Seedance 2.5 and the other two is a function of tokens, not of any hidden fee. At 720p the token rate gives $0.5778 a second against $0.125 for Wan and Omni, so a hook of any length costs about four and a half times as much. If the creative reason for choosing Seedance 2.5 is the longer single take or the reference handling, a 4-second hook is the wrong place to spend that premium.

A sensible split is to draft hooks on the cheaper models, then use Seedance for the sequences where its strengths matter. Each choice is a one-line change to the model field.