Seedance 2.5 vs 2.0 for a 12-second 9:16 ad at 720p: $6.93 vs $4.54

A 12-second 720p vertical ad costs $6.93 on Seedance 2.5 (12 x $0.5778) and $4.536 on Seedance 2.0 (12 x $0.378) on Sume. The gap is $2.40. What it buys, per Sume's docs, is a longer ceiling: 2.5 accepts 4 to 30 seconds and 2.0 accepts 4 to 15.

Both rows list 480p, 720p and 1080p, and neither lists 4K. If your ad is 12 seconds and no longer, nothing in the Sume docs says 2.5 is necessary; compare the output on your own prompts.

Price at each resolution for 12 seconds

List prices at default options, as of 2026-10-09.

Ratios

Seedance 2.5 is 1.53 times the price of 2.0 at 480p, 1.53 times at 720p and 1.67 times at 1080p. The premium is the same percentage for any duration, so a 4-second test at 720p is $1.512 against $2.3112.

At a 100-ad month the 720p gap is 100 x $2.40 = $240 for 12-second clips.

Choosing

Use 2.0 when the ad is 15 seconds or less and you are cost-bound. Use 2.5 when you need 16 to 30 seconds, or when your own side-by-side shows it follows your prompts better. Sume's Video Router lists both, plus seedance-2-mini and seedance-2-fast ids whose prices you should read live from GET /v1/video-router/models before comparing.

Examples

The following figures use the same list prices as the tables above.

• A 15-second 720p ad: Seedance 2.0 15 x $0.378 = $5.67; Seedance 2.5 15 x $0.5778 = $8.67.
• A 30-second 720p ad: Seedance 2.5 only, 30 x $0.5778 = $17.33.
• A 30-day month of one 12-second 720p ad a day: 2.0 is 30 x $4.536 = $136.08; 2.5 is 30 x $6.9336 = $208.01.
• Both accept a 9:16 aspect ratio, per the docs.

Limits of this comparison

Sume's docs state limits, not quality rankings, so this post does not say which model looks better. A fair test is to run one prompt on both at 480p first: 12 seconds is 12 x $0.268677 = $3.22 on 2.5 and 12 x $0.17577 = $2.11 on 2.0, so a side-by-side costs $5.33. If the two outputs are indistinguishable for your use, the cheaper row wins; if 2.5 is visibly better, you have a reason for the premium that you measured yourself.