Kling 3.0 Motion Control: an 18.4-second driver costs $2.99

An 18.4-second driving video on Sume's Kling 3.0 Motion Control bills as 19 seconds because the catalog rounds up to whole seconds: 19 x $0.1575 = $2.9925. Twelve such clips cost $35.91. The output length follows the driving motion video, and the maximum is 30 seconds ($4.725).

Rounding up

The catalog reserves ceil(duration_seconds) x the Kling motion-control list after Sume margin. The list is $0.126 per second, and the margin brings it to $0.1575. So 7.2 seconds bills 8 and 18.4 seconds bills 19.

The effect is largest on short clips: 7.2 s is billed as 8 s, which is 11 percent more than the raw length. At 18.4 s the extra is 3 percent. Trimming a driving video from 18.4 to 18.0 seconds saves one billed second, or $0.1575.

Output follows the driver

You do not choose the length: the output follows the driving motion video, for 1-30 seconds. So the lever for cost is the driving clip, which you can trim before submitting. A video trim job is $0.02 in the catalog, so trimming costs less than one billed second.

Twelve templates at 19 billed seconds each is 228 seconds: 228 x $0.1575 = $35.91. If trimming them all to 18 seconds, the total is 216 x $0.1575 = $34.02, minus 12 x $0.02 = $0.24 for trims, a net saving of $1.65.

• Range: 1-30 seconds
• Rate: $0.1575 per billed second
• Trim job: $0.02

Budget check

The catalog's minimum for a job is 16 cents (one second) and maximum $4.725 for the 30-second ceiling. A 30-second driver is 4.725; that is where a surprise would be largest if you pass an unedited recording.

Always inspect the duration of the driver first. The video inspect endpoint can read it, and the Jobs and results page explains how to wait for the job.

A second scenario

Scale the driver count. Forty clips with an 11-second driving video bill 11 seconds each: 11 x $0.1575 = $1.7325 per clip and 40 x $1.7325 = $69.30. If the drivers are 10.2 seconds, each bills 11 as well, so 10.2 and 11.0 cost the same; trim to 10.0 and the price drops to $1.575 per clip.

Compare with generated video

A 19-second Seedance 2.5 clip at 720p is 19 x $0.5778 = $10.98, so Motion Control at $2.99 is about 27 percent of the price, but it does a different job: it transfers motion from your driver rather than inventing it.

Reproduce the numbers

Open https://api.sume.com/v1/catalog, which needs no key, and find the entry for the product. Each model_pricing row carries price, unit, pricing_basis and the estimated, minimum and maximum cents. Multiply the unit price by your quantity and round only at the end. The catalog also has applied_* fields that include an agent fee of 550 basis points; the figures in this post use the base prices.