Seedance 2.5 30-second 720p price by aspect ratio: token counts
On Sume 16:9, 9:16 and 1:1 all cost $17.34 for 30 s at 720p, while 21:9 costs $17.42 and 4:3 $17.45. Frame sizes, token counts and the formula.
A 30-second Seedance 2.5 clip at 720p costs $17.34 in 16:9, 9:16 and 1:1, $17.42 in 21:9 and $17.45 in 3:4 or 4:3. The price follows pixel count, and three of the six ratios the model accepts happen to have the same pixel count at 720p. If you are choosing a ratio to save money, the choice matters by about eleven cents.
| Aspect ratio | Frame size | Video tokens, 30 s | Sume price |
|---|---|---|---|
| 21:9 | 1470 x 630 | 651,165 | $17.42 |
| 16:9 | 1280 x 720 | 648,000 | $17.34 |
| 4:3 | 1112 x 834 | 652,084 | $17.45 |
| 1:1 | 960 x 960 | 648,000 | $17.34 |
| 3:4 | 834 x 1112 | 652,084 | $17.45 |
| 9:16 | 720 x 1280 | 648,000 | $17.34 |
How the numbers are built
Sume's pricing tables hold a fixed frame size for each resolution and ratio. Tokens are ceil(width x height x seconds x 24 / 1024). For 1280 x 720 at 30 s that is 921,600 x 30 x 24 / 1024 = 648,000. The list rate at 720p is $0.0214 per 1000 tokens, so 648 x $0.0214 = $13.8672, times 1.25 is $17.334, rounded up to $17.34 per job.
A 4:3 frame is 1112 x 834 = 927,408 pixels, so 652,084 tokens (rounded up) and $17.45. The extra $0.11 buys 0.6 percent more pixels.
Practical consequences
- Picking 9:16 for a vertical ad costs the same as 16:9 at 720p, so there is no price reason to crop a landscape clip.
- 21:9 is the widest ratio in the table and costs less than 0.5 percent more than 16:9.
- The same logic holds at 480p, where 16:9 (864 x 496) and 21:9 (992 x 432) both have 428,544 pixels.
- Wan 3.0 does not list 21:9 in its catalog entry and prices per second, so ratio never changes its price.
Worked example: a month of vertical ads
A team makes forty 30-second Seedance 2.5 ads a month at 720p. In 9:16 that is 40 x $17.34 = $693.60. The same forty in 21:9 would be 40 x $17.42 = $696.80 and in 4:3 40 x $17.45 = $698.00. The spread across ratios is about $4.40 a month, which is smaller than the cost of one extra draft, so pick the ratio the channel needs.
Resolution moves the bill far more than ratio. The same forty ads at 480p in 9:16 (496 x 864) are 40 x $8.07 = $322.80, and at 1080p (1080 x 1920) they are 40 x $42.65 = $1,706.00. Those numbers use the frame sizes in Sume's pricing table and the 1.25 multiplier, and they assume no reference video.
The 1080p rate in the table is $0.0234 per 1000 tokens against $0.0214 at the other two tiers, so 1080p costs about 9 percent more per token on top of having 2.25 times the pixels of 720p.
What to read before you submit
Aspect ratio support differs by model, so call GET /v1/videos/models and read supported_aspect_ratios. A reference video changes Seedance pricing, so these figures only hold for text-to-video, image-to-video and image or audio references without a reference clip.
Sources
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Written by Sume