Which AI video models charge the same for 720p and 1080p?

Two models in this comparison charge the same price at 720p and 1080p. Google lists Veo 3.1 Standard at $0.40 a second for both 720p and 1080p, and Sume prices Kling Video v3 Pro per second with one per-second rate for both resolutions, at $0.14 with audio off and $0.21 with audio on. For these two, always request 1080p. For the models in the second table, 1080p costs more.

Flat across resolution

Kling on Sume lists 720p and 1080p in the catalog with one per-second rate, so the cells below repeat the same price.

Priced by resolution

Sume figures are list price times 1.25. On these four, a 720p draft is a real saving, and 1080p should be reserved for the take you intend to keep.

What to do with it

A flat rate removes a decision but not the cost of retakes. If a model needs several tries, the cost per kept clip is the rate times the seconds times the tries, so measure your own retake rate before you pick.

• On a flat-rate model, skip the draft resolution, since a 720p draft costs as much as the final.
• On a per-resolution model, draft low and re-render the winner at 1080p.
• Check the duration limits: Kling takes 4 to 15 seconds a job on Sume.

Where this saves a mistake

A common budgeting error is to price a 1080p final from the 720p draft rate. On a flat-rate model the two agree, so the error is zero. On Wan 3.0 it is a factor of two, and on Veo 3.1 Lite it is 1.6. Read the rate for the resolution you will deliver, then price drafts separately. If a model lists only one resolution row, such as Veo Standard's combined 720p and 1080p line, treat the two as one product.

Also compare totals on the same duration, because Kling on Sume takes 4 to 15 seconds a job while Veo's limits are not on the pricing page. A cheaper rate for a clip that cannot reach your length is not a saving.