Runway Seedance 2 Mini 64-credit minimum vs Sume's mini reserve

Runway's API pricing page lists seedance2_mini at 16 credits per second at 480p or 720p, with a 64-credit minimum. At $0.01 per credit that is $0.16 per second and a $0.64 floor, which is exactly 4 seconds. Sume's seedance-2-mini reserves the provider list price times 1.25 by the second: $0.36 for 4 seconds at 480p and $0.76 at 720p, before the agent fee.

Runway facts are from its pricing page, read 2026-10-01, including its statement that credits are $0.01 each. Sume's rule is from the video docs; the figures are computed from its pricing code.

What does the 64-credit minimum change?

Nothing at 4 seconds or longer, since 4 x 16 = 64. Mini clips run 4 to 15 seconds on Sume, so the floor and the per-second charge meet at the shortest clip. The page lists the same 16 credits per second for 480p and 720p.

What does Sume reserve for the same clips?

Sume prices resolution separately. The estimates below are for 16:9 clips, computed from the same code the API uses to reserve at submit. Add the 5.5% agent fee that applies by default.

Which resolutions does each side offer?

Runway's line covers 480p and 720p. Sume's docs name 1080p for seedance-2 and do not mention it for mini, so treat mini as 480p and 720p and read GET /v1/catalog before sending anything else.

How do I avoid overspending while testing?

Draft at 480p, then render the keeper. See Seedance 2.0 Fast vs Mini for how the ids differ, and cheapest Seedance 2.0 API for the price ladder. If a balance cannot cover the estimate, the request fails with 402 insufficient_credits rather than a partial run.