15-second Seedance clip: $2.835 on Mini to $8.667 on 2.5

Fifteen seconds is the ceiling for Seedance 2, 2 Fast and 2 Mini, and a mid-range length for Seedance 2.5. At 720p it costs $2.835 on Mini, $4.536 on Fast, $5.67 on Seedance 2 and $8.667 on Seedance 2.5.

All tiers, all resolutions

What 15 seconds means per tier

The docs give Seedance 2.5 4 to 30 seconds and every other Seedance id 15 seconds. A 15 s request is therefore valid on all four, which makes it the cleanest length for a like-for-like price check.

If the clip needs 16 to 30 seconds, only seedance-2.5 can do it in one job; the others need two jobs and an assembly step such as Timeline 1.0.

Same prompt, four tiers

Loop over the ids to produce your own comparison; the request only changes the model string.

for m in seedance-2-mini seedance-2-fast seedance-2 seedance-2.5; do
  curl -s -X POST https://api.sume.com/v1/videos \
    -H "Authorization: Bearer $SUME_API_KEY" \
    -H "Content-Type: application/json" \
    -d "{\"model\":\"$m\",\"prompt\":\"A skater crosses a plaza at golden hour\",\"duration\":15,\"resolution\":\"720p\",\"aspect_ratio\":\"9:16\"}"
  echo
done

Per second at 15 seconds

Divide each 720p figure by 15 and the tiers read $0.189 (Mini), $0.3024 (Fast), $0.378 (Seedance 2) and $0.5778 (Seedance 2.5) per second. Seedance 2.5 at 720p is 3.06x the Mini price for the same 15 seconds.

These are Sume prices, provider list times 1.25, reserved at submit. A balance short of the figure in the table returns 402 insufficient_credits instead of starting the job.