Kling 3.0 Motion Control: a 13.2 s driver video bills 14 s, $2.205

On Sume, Kling 3.0 Motion Control is priced at $0.1575 per output second for 1 to 30 seconds. A driver clip of 13.2 seconds is billed as 14 seconds, so the run costs $2.205. The catalog also lists the route as the avatar model sume/avatar-1.0/motion-control.

Prices for common lengths

The unit is the output second, rounded up to whole seconds. The price is linear inside the 1 to 30 second range.

Why the round-up matters

Rounding adds up across a batch. Ten drivers that all measure 13.2 seconds bill 140 seconds, which is $22.05, while the raw length is 132 seconds, or $20.79. The 8 seconds of difference is $1.26. Trimming a driver from 13.2 to 13.0 seconds saves one billed second, $0.1575, per run.

Use Video trim before you submit if you are just over a whole second. Trim costs $0.02, and one second saved is $0.1575, so the trim pays for itself on any run that drops a billed second, and it is frame-accurate in the default exact mode.

Practical notes

The live price is in the public Sume catalog. Model families are listed in the model docs.

• Outputs over 30 seconds are outside the range and are not accepted.
• Billing is reserved in exact USD micros, rounded up to cents at submit, and refunded on failure.
• Use an Idempotency-Key so a retried request does not start a second run.
• Check the catalog for the request body, as the field set can change.

Budget a batch before you start

Work out the billed seconds for every driver first. Measure each driver clip, round each one up to a whole second, and sum. Six drivers of 13.2, 9.4, 5.0, 20.0, 29.1 and 30.0 seconds bill 14, 10, 5, 20, 30 and 30 seconds, which is 109 seconds and $17.1675. A balance below that returns 402 insufficient_credits for the later runs.

The check takes a minute, and it avoids a batch that stops halfway. Remember that reservation is held per run at submit, so submitting all six at once needs the full $17.1675 to be free at that moment.