Kling 3 costs the same at 720p and 1080p: $1.68 for 8 s with sound

Kling 3 on Sume has one price across its two resolutions. An 8-second clip bills $1.68 with sound and $1.12 muted at 720p and also at 1080p, so there is no cost reason to pick 720p. Kling 3 takes 16:9, 9:16 and 1:1, 4 to 15 seconds.

The price grid

Billable prices, read from the Sume catalog.

Arithmetic

The per-second rates fall out of the table: 168 cents / 8 s = 21 cents a second with sound, and 112 / 8 = 14 cents a second muted. Ten seconds is then 10 x 21 = 210 cents and 10 x 14 = 140 cents, which matches the catalog. Sound adds 7 cents a second, or 50 percent over the muted rate (7 / 14).

What it means for ads

TikTok's non-Spark page sets minimums of 540x960 for 9:16 and recommends 9:16. A 720p vertical file is already above the minimum, and 1080p costs nothing extra on Kling 3, so choose 1080p when the ad will be cropped or re-framed later.

The other families do not behave this way. Seedance 2.5 8 s at 9:16 is $4.63 at 720p and $11.38 at 1080p, so the choice there is a spend decision. On Kling 3, muted output is the lever, not resolution.

• Kling 3 resolutions: 720p and 1080p only.
• Check sound with generate_audio: it is a field on /v1/videos and GET /v1/videos/models reports generate_audio for each model.

A cost comparison across families

For an 8-second 9:16 clip at 1080p the catalog gives these billable prices: Kling 3 with sound $1.68, Seedance 2.0 $6.81, Seedance 2.5 $11.38, Wan 3.0 $2.00 and Seedance 2.0 Mini $3.41. Kling 3 is the cheapest of the five at 1080p for this length, with the caveat that each model differs in what it does with the same prompt, and that this post does not rate quality.

At 1080p Kling 3 is 168 / 681 = 25 percent of the Seedance 2.0 price for the same length. At 720p the ratio is 168 / 303 = 55 percent, so the price advantage of Kling 3 is bigger at 1080p.

Checking the claim yourself

Read GET /v1/videos/models and the price fields it returns for Kling 3, then compute a clip at both resolutions. If the two numbers match for the length you want, the guidance above holds. Prices in the catalog can change, so the table shows the values on 2026-10-08 and not a promise.

Also confirm the aspect ratio. Kling 3 lists 16:9, 9:16 and 1:1, so a 4:3 or 3:4 request is not one of its ratios. A Seedance row takes those, and Wan 3.0 does too.

Budget example

A batch of 25 ad variants at 8 seconds with sound costs 25 x 168 = 4200 cents, or $42.00, at either resolution. Muted, the same batch is 25 x 112 = 2800 cents, or $28.00. The $14.00 difference is the cost of native sound for the batch; it is also the budget for 14 / 0.125 = 112 Music 1.0 generations, if you would rather add your own bed.