8-second 1080p clip: Gemini Omni Flash vs Seedance 2.5 on Sume

An 8-second 1080p clip costs $1.50 on Gemini Omni Flash and $11.3724 on Seedance 2.5 on Sume, a ratio of 7.58. Omni Flash also lists 4K, at $3.00 for 8 seconds, still cheaper than Seedance 2.5 at 1080p.

Eight seconds across tiers

Both models accept 8 seconds on Sume. Omni Flash covers 3 to 10 seconds in 16:9 or 9:16 with native audio always on. Seedance 2.5 covers 4 to 30 seconds.

What the price gap leaves out

The gap is large enough that quality, not price, should drive the choice of Seedance 2.5. Reasons to pay it are concrete: clips longer than 10 seconds, aspect ratios beyond 16:9 and 9:16, or a side-by-side where Seedance wins for your content. For 8-second vertical or landscape shots where Omni Flash is good enough, the same budget buys 7.6 times as many clips.

At a $100 budget, 1080p 8-second clips come to 66 on Omni Flash and 8 on Seedance 2.5, rounding down.

How to test

Run one prompt on each, pinned with the model field of POST /v1/videos, and compare the files. Then multiply by your clip count. The wire format and limits are on the Video generation page, and rates are in the public catalog. Sume's docs make no quality ranking between the two, and neither does this page.

• 8 s or less, 16:9 or 9:16: price favors Omni Flash.
• Over 10 s per clip: Seedance 2.5 is the option of the two.
• Test one prompt on both before a batch.

Reproduce the numbers

Every Sume price on this page comes from the public catalog at https://api.sume.com/v1/catalog, which needs no API key. Fetch it, find the row for the job or model named in the table, and multiply by your own seconds, characters or image count. Sume bills the list price shown in that row, so the catalog figure is the one that applies to your balance.

All figures on this page are Sume's own, as of 2026-10-09. Prices and limits can change, so re-read the catalog and the linked docs before a large run, and keep the arithmetic in a spreadsheet so you can update it in a minute.