12 weekly 6-second ads: Omni $9.00, Kling 3 $15.12, Seedance $41.60

Twelve 6-second vertical ads cost $9.00 on Gemini Omni Flash 1.1 at 720p, $15.12 on Kling 3 with sound and about $41.60 on Seedance 2.5 at 720p. Over 52 weeks that is $468, $786 and about $2,163, before any render or caption fees.

Omni is the cheapest of the three here. Seedance 2.5 costs 4.6 times as much per second at 720p, so use it when you need what it adds, such as 30-second takes or audio references.

The per-second rates

Kling 3 is $0.14 a second silent and $0.21 with sound on Sume. Omni is $0.125 at 720p, and its sound is always on. Seedance 2.5 is priced in video tokens; a 720p 9:16 second is 21,600 tokens, which comes to about $0.578.

All Sume video rates are the provider list price times 1.25, and you can read the live values from GET /v1/videos/models.

What each one gets you

Omni takes 3 to 10 seconds, in 16:9 or 9:16, with image and short video references but no audio reference. Kling 3 stops at 15 seconds. Seedance 2.5 runs 4 to 30 seconds and accepts audio and video references.

For a 6-second hook all three fit. The price gap only pays off if the ad needs a feature the cheaper model lacks.

Add the finishing costs

If each ad gets a Timeline render and captions, add $0.10 and $0.20 per ad: $3.60 for twelve. The Omni week then lands at $12.60.

Keep one idea in mind when you choose: these are list rates for one successful take. A weekly batch that needs one retake in four costs a third more on any of them.