Seedance 2.5 vs Gemini Omni Flash: length, size and inputs
Seedance 2.5 on Sume runs 4-30 s up to 1080p; Omni Flash 1.1 runs 3-10 s up to 4K and adds edits. Pick by length first. Read 2026-10-13.
Pick by length first. If the clip is over 10 seconds, seedance-2.5 is the answer on Sume (4 to 30 s, up to 1080p). If it is 10 seconds or under and you need 4K or a clip edit, gemini-omni-flash-1.1 is the one. Both take text, a first frame, an end frame and references.
The limits
Pricing differs in shape: Seedance rows are billed per 1000 video tokens, Omni per second, so a direct per-second comparison needs a token estimate that this post does not make.
| Limit | `seedance-2.5` | `gemini-omni-flash-1.1` |
|---|---|---|
| Length | 4-30 s | 3-10 s |
| Resolutions | 480p, 720p, 1080p | 360p, 720p, 1080p, 4K |
| Aspect ratios | includes 4:3 and 3:4 | 16:9 or 9:16 |
| Edit a clip | no | yes |
| Billing unit | per 1000 video tokens | per second |
bitrate_mode | not accepted | not accepted |
Practical call
For a 15-second product spot, Omni stops at 10 seconds, so you need a row that goes longer, such as Seedance (or Wan 3.0, Kling 3 or an H3 row), to reach it in one job. For a 6-second hero loop at 4K, Omni has a 4K tier on the fal-served rows (MiniMax H3 also lists 4K, as an upscale from 768p). See the loops post for end-frame use.
Sources
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