Does a vertical 9:16 Omni Flash clip cost more than 16:9?

No. A 10-second 1080p Omni Flash clip is $1.875 at 9:16 and $1.875 at 16:9 on Sume. Price depends on output seconds and resolution only; the aspect ratio is a free choice between the two the model offers.

That matters for vertical work. YouTube says Shorts can be up to three minutes long and square or vertical (read 2026-10-08, see sources), so a 9:16 render is the natural default and costs nothing extra.

Same price, both ratios

Asking for a ratio

Send aspect_ratio on the request. Omni accepts only 16:9 and 9:16, so a 1:1 or 4:3 request is outside the catalog envelope.

curl -X POST https://api.sume.com/v1/videos \
  -H "Authorization: Bearer $SUME_API_KEY" \
  -H "Content-Type: application/json" \
  -H "Idempotency-Key: vertical-hook-001" \
  -d '{
    "model": "gemini-omni-flash-1.1",
    "prompt": "A barista pours latte art, close, steam rising, cafe chatter",
    "duration": 5,
    "resolution": "720p",
    "aspect_ratio": "9:16"
  }'

One caution

The same story in both ratios is two jobs, not one render cropped twice. If you want a 16:9 master and a 9:16 cut, budget two clips; the second is the same price as the first.

Worked example: master plus vertical cut

An 8-second 1080p 16:9 master is $1.50 and a 9:16 cut of the same length is another $1.50, so the pair is $3.00. The ratio never changes the price; the second job does.

Omni clips run 3 to 10 seconds. To cover 180 seconds of vertical footage you need at least 18 ten-second clips; at 720p that is 18 x $1.25 = $22.50. Native synced audio is always on and included in these rates.