Which Sume video models take 9:16 vertical, and what 10 seconds costs

For 9:16 vertical video, Sume's documented options are Gemini Omni Flash 1.1, which accepts only 16:9 or 9:16, Seedance 2.0, whose model entry lists 21:9, 16:9, 4:3, 1:1, 3:4 and 9:16, and Seedance 2.5, whose docs example is a 9:16 request. A 10-second vertical clip at 720p costs $1.25 on Omni, $3.78 on Seedance 2.0 and $5.78 on Seedance 2.5 (10 x $0.5778 = $5.778).

For the other rows, read supported_aspect_ratios from GET /v1/videos/models rather than assuming; I only count a row here when the docs name it.

Vertical-capable rows

Prices are Sume list prices at default options, as of 2026-10-09. Durations are the documented ranges.

A vertical request

Set aspect_ratio to 9:16 and a resolution. For Seedance 2.5 that is the request below. With 12 seconds at 720p the price is 12 x $0.5778 = $6.93.

curl -X POST https://api.sume.com/v1/videos \
  -H "Authorization: Bearer $SUME_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model":"seedance-2.5","prompt":"A vertical UGC-style product clip on a desk, natural light","aspect_ratio":"9:16","resolution":"720p","duration":12}'

Picking one

Omni is the cheapest of the three and has audio built in, but stops at 10 seconds. If the ad needs 15 seconds, Seedance 2.0 is the cheaper of the two that reach it: 15 x $0.378 = $5.67 at 720p. If it needs 20 to 30 seconds, only Seedance 2.5 among these reaches it, at 30 x $0.5778 = $17.33 for 30 seconds.

Vertical ad budgets

The following figures use the same list prices as the tables above.

• Twenty vertical 10-second ads a week at 720p: Omni 20 x $1.25 = $25.00; Seedance 2.0 20 x $3.78 = $75.60; Seedance 2.5 20 x $5.778 = $115.56.
• At 480p the same twenty ads are $0.268677 x 200 s = $53.74 on Seedance 2.5 and 200 x $0.17577 = $35.15 on Seedance 2.0.
• Omni's 3 to 10 second range covers most feed ads, but not a 15-second slot.

Limits of this comparison

Platform limits sit on top of model limits. A 9:16 clip still has to fit the destination's length cap, and a model that stops at 10 seconds cannot fill a longer slot without a second clip. Sume's timeline render ($0.10 per output minute, one-minute minimum) can join several 9:16 clips, so two 10-second Omni clips joined into a 20-second ad cost 2 x $1.25 = $2.50 for the clips plus $0.10 for the render. Whether a joined ad reads as one scene depends on the prompts and on first and last frame control, which Seedance 2.0 lists in supported_frame_images.