Seedance 2.5 or Seedance 2 on Sume: price and length compared

Seedance 2.5 costs about $0.58 per second at 720p on Sume against $0.38 for Seedance 2, and it stretches the cap from 15 to 30 seconds. If your clip is 15 seconds or shorter and you do not need the 2.5 behavior, the older id is cheaper.

Both ids are in the Sume catalog and use the same video-token formula.

Table

Choose by job

The docs also list seedance-2-fast and seedance-2-mini with lower list rates for drafts.

• Under 16 s and cost-sensitive: seedance-2.
• Anything between 16 and 30 s in one take: seedance-2.5.
• Reference-heavy cast: 2.5 and its up to 9 images and 3 videos.

Speed and draft models

The catalog also holds seedance-2-fast and seedance-2-mini, with provider lists of $0.0112 and $0.007 per 1,000 tokens. They suit storyboards where 2.5 is overkill.

Seedance 2 itself reaches 1080p at 4 to 15 seconds.

A decision rule

If the final is 15 seconds or shorter, price 2 against 2.5 on a single brief at 720p: 10 seconds is $3.78 against $5.78. For anything longer than 15 seconds, 2.5 is the only Seedance option.

Keep prompts portable between versions, but expect different results from the same text.

• Do not assume a prompt transfers 1:1.
• Compare on the same seed-less prompt.
• Use mini for rough cuts.