A 2-second 9:16 hook clip costs 25 cents, and only Wan 3.0 makes it

Wan 3.0 is the only prompt-driven video row on Sume that accepts a 2-second clip. At 720p a 2-second clip bills 25 cents, and the whole short end of the range is cheap: 3 seconds is 38 cents, 4 seconds is 50 cents and 5 seconds is 63 cents. Every other text-to-video row starts at 3 seconds (Gemini Omni Flash 1.1), 4 seconds (Seedance and Kling 3) or 5 seconds (MiniMax H3 and H3 Max).

Wan 3.0 short-clip prices

Billable prices, which are list price times 1.25 rounded up to the cent.

Arithmetic

The price is linear in seconds. At 720p the rate is 12.5 cents a second, so 2 s is 25 cents, 3 s is 37.5 cents rounded up to 38, and 5 s is 62.5 cents rounded up to 63. At 480p the rate is 6.25 cents a second, so 2 s is 12.5 cents, rounded up to 13. The rounding is applied to each clip, so ten 3-second clips cost 10 x 38 = 380 cents, not 375.

When a 2-second clip is useful

A short clip is a building block. A hook of two seconds followed by a longer body can be assembled in Timeline 1.0, which renders at $0.10 per started output minute, so a hook and body of under a minute adds one $0.10 step. A 2-second Wan clip plus a 10-second Wan clip at 720p is 25 + 125 = 150 cents, and the join is another 10 cents, which makes $1.60.

Check the platform side before you plan around it. TikTok's non-Spark page gives no minimum duration in the facts used here, and no short-clip claim is made about how a 2-second clip performs. The 2-second floor is simply what the Sume catalog lists for Wan 3.0, so read supported_durations from GET /v1/videos/models before you build a form around it.

Check before you build on it

The catalog and the router docs are the source for the 2-second floor. If a future change adds a lower floor to another row, supported_durations in the live models list will show it. Build any form or script on that field, not on the number in this post.

Also note that the 2-second clip is a plain generation, so the same audio and aspect rules as other Wan 3.0 clips apply. It accepts 9:16, 16:9, 4:3, 3:4 and 1:1.

Hook test budget

Ten different 2-second hooks at 720p cost 10 x 25 = 250 cents, or $2.50. The same ten hooks at 4 seconds, which is the shortest length on Seedance and Kling 3, cost $5.00 on Wan 3.0 and 10 x 232 = $23.20 on Seedance 2.5. A 3-second Omni clip at 720p is 38 cents, the same as Wan at 3 seconds.

So for a pure hook test where two seconds is enough, Wan 3.0 is the cheapest row, and the cost grows linearly if you move to longer cuts.