Seedance 2.5 Flash: what it does, price and my 720p test
ByteDance is releasing Seedance 2.5 Flash, a faster Seedance 2.5 with 4-30 s clips at 480p and 720p and sound in the same pass. I ran three 720p clips: each was ready in 2.5 to 3 minutes.
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In short: Seedance 2.5 Flash is the faster version of ByteDance’s Seedance 2.5. It makes 4 to 30 second clips at 480p or 720p with sound, from text, an image or references. ByteDance says results are close to the full model at roughly twice the speed. I ran three clips at 720p: each was ready in about 2.5 to 3 minutes.
Seedance 2.5 Flash is a faster, trimmed-down Seedance 2.5, one of ByteDance’s strongest video models. The full model makes 30-second shots at 1080p, takes 30 reference images and edits existing video. Flash is meant to be faster and cheaper, and in exchange it stops at 720p and takes fewer references. The official API opens on 15 November, but the model is already available in early access, so I tested it myself on 12 November.
How I pay per second for video models like this one, without a subscription: Jantaris.
What Seedance 2.5 Flash can do
- Text to video. Describe the scene and the model makes a shot with sound: speech, effects and music.
- Image to video. Give it a first frame, optionally a last frame too, and it fills in the motion between them.
- References. Up to 10 images, 5 video clips and 5 audio tracks, referenced in the prompt as @Image 1, @Video 1, @Audio 1.
- Length: 4 to 30 seconds, in one-second steps.
- Resolution: 480p or 720p. No 1080p.
- Aspect ratios: 16:9, 9:16, 4:3, 3:4, 1:1 and 21:9.
Flash or the full Seedance 2.5
| Seedance 2.5 Flash | Seedance 2.5 | |
|---|---|---|
| Resolution | 480p, 720p | 480p, 720p, 1080p |
| Clip length | 4-30 s | 4-30 s |
| Reference images | up to 10 | up to 30 |
| Reference clips | up to 5 | up to 10 |
| Audio tracks | up to 5 | up to 10 |
| Edit and extend video | no | yes |
| Speed (per ByteDance) | about 2x faster | - |
Bottom line: Flash for quick versions, reels and ads at 720p. The full model for 1080p finals, projects with a dozen photos of the same person or product, and edits of existing footage.
My test: three clips at 720p
I ran three 5-second clips at 720p from text only, no images: a barista pouring milk into a cup, a cyclist on a coastal road at dusk, a paper boat drifting down a forest stream. From submitting to the finished file took 157, 165 and 180 seconds. The picture was clean: no stray text, no melting hands. The sound fit the scene: surf, trickling water, café noise.
Price and where to use it
Seedance 2.5 Flash is available on Jantaris in Studio, over the API and in Claude via MCP. You pay per second of finished video, with no subscription: 0.264 USD per second at 480p and 0.528 USD at 720p. A 5-second clip at 720p comes to 2.64 USD, and a failed generation costs nothing. At 720p Flash is about 10% cheaper per second than the full Seedance 2.5, and at 480p they cost practically the same.
Full side-by-side: Seedance 2.5 vs 2.5 Flash.
FAQ
Does Seedance 2.5 Flash do 1080p?
No, only 480p and 720p. For 1080p you need the full Seedance 2.5.
Does it generate audio?
Yes, by default together with the picture: speech, effects and music. You can switch audio off.
How long does a clip take?
In my test a 5-second 720p clip was ready 2.5 to 3 minutes after submitting. ByteDance says Flash is roughly twice as fast as the full Seedance 2.5.
Can I use a photo of a real person?
Yes, in image and reference mode, if you have that person’s consent.
Sources and date checked
- BytePlus - Seedance (checked 12.11.2026)
- Jantaris - Seedance 2.5 Flash, prices and parameters (12.11.2026)
- My test, 12.11.2026: 3 clips, 720p, 5 s, text only
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