Kling 3 stops at 15 seconds: three ways to a 30-second clip

kling-3 takes 4 to 15 seconds on Sume, so a 30-second take needs a different id or two clips. wan-3.0 does 30 seconds in one job for $3.75 at 720p; seedance-2.5 does it for $17.33; two 15-second Kling 3 clips with sound cost $6.30 before assembly.

30 seconds, three routes

Assembly uses Timeline 1.0, billed at $0.10 per output minute, rounded up.

Which fits

One job is simpler: one reservation, one result, no seam where two takes meet. Two joined takes make sense when you want Kling 3 specifically, or when the two halves are separate shots by design.

• Continuous motion over 30 seconds: Wan 3.0 or Seedance 2.5.
• Two distinct shots: two Kling 3 jobs and a Timeline render.
• Longer than 30 seconds: shots plus Timeline for every model.

Request for the single-job route

Moving to Wan 3.0 for a 30-second take is one body. The hold is the full price of the 30 seconds, so the balance must cover it at submit; a shortfall returns 402 insufficient_credits. Send an Idempotency-Key so a retry of the same request returns the original job.

{
  "model": "wan-3.0",
  "prompt": "A long slow pan across a harbor at first light",
  "duration": 30,
  "resolution": "720p"
}