Seedance 2.5 720p on fal, 1080p on Sume: read the catalog

Seedance 2.5 can make a 30-second clip on both platforms, but the resolution ceilings listed differ. fal's model list describes "Seedance 2.5 Image to Video" as producing a native 30-second clip at up to 720p, while Sume's docs list seedance-2.5 at 4-30 seconds and 480p, 720p or 1080p.

The two listings side by side

Why not hard-code it

The Sume video docs say limits are not uniform across models: seedance-2.5 accepts 4-30 seconds, wan-3.0 accepts 2-30 seconds, and every other catalog model tops out at 15 seconds unless noted. Read supported_resolutions and supported_durations from the catalog rather than assuming one envelope.

The listing is one call:

curl "https://api.sume.com/v1/videos/models" \
  -H "Authorization: Bearer $SUME_API_KEY"

What to check in the response

Each model entry carries fields you can validate against before you submit.

• supported_resolutions for the resolution you want to pin, such as 1080p.
• supported_durations for whole-second lengths.
• supported_frame_images and supported_input_references if you are starting from an image.
• generate_audio to see whether audio is generated.
• pricing_skus for the price lines.

Submitting a pinned request

A pinned Seedance 2.5 job through the Video Router uses the documented shape. Sume bills provider list times 1.25 on every model, so reserve for the resolution and length you choose, not the cheapest listing.

curl -X POST https://api.sume.com/v1/video-router/generate \
  -H "Authorization: Bearer $SUME_API_KEY" \
  -H "Content-Type: application/json" \
  -H "Idempotency-Key: seedance-1080p-001" \
  -d '{
    "model": "seedance-2.5",
    "prompt": "A vertical product clip on a desk, natural light",
    "resolution": "1080p",
    "duration": 12,
    "aspect_ratio": "9:16",
    "mode": "async"
  }'

Takeaway

Listings on a marketplace page and on Sume are separate catalogs, so a limit on one is not a limit on the other. If a workflow was designed around 720p because of one listing, re-read the Sume catalog before you decide whether 1080p is available for your clip.