# Seedance

> Seedance 2.5, 2.0, 2.0 Fast and 2.0 Mini on zurelay: which to pick, image-to-video, up to 9 reference images and prompting.

Source: https://zurelay.com/docs/seedance

ByteDance’s Seedance models: cinematic motion, native sound, and control from frames or reference images.

## Which one to use

| Model | Pick it for | Prices per second | Length |
| --- | --- | --- | --- |
| Seedance 2.5 | The best quality and longest clips, up to 1080p | 480p $0.14, 720p $0.305, 1080p $0.75 | 4 to 30 s |
| Seedance 2.0 | High quality at a lower price | 480p $0.097, 720p $0.207 | 4 to 15 s |
| Seedance 2.0 Fast | Quicker turnarounds | 480p $0.074, 720p $0.159 | 4 to 15 s |
| Seedance 2.0 Mini | The lowest price, for drafts and volume | 480p $0.047, 720p $0.10 | 4 to 15 s |

All four take a prompt, a first and last frame, or up to 9 reference images, and make sound unless you set `generate_audio` to `false`.

## Prompting

- Describe the motion, not just the scene: who moves, how, and what the camera does (“slow push in”, “handheld tracking shot”, “static wide shot”).
- Name the light and mood: “overcast morning”, “neon at night”, “golden hour backlight”.
- Keep one main action per clip. Long sequences come out better as several clips.
- For speech, put the line in quotes and say who says it: `the barista says "One flat white, coming up"`.
- From a first frame, describe what happens next rather than what’s already in the picture.

## Image-to-video

A first frame fixes the opening shot exactly; the video takes its shape unless you set `aspect_ratio`. Add a last frame to land on a specific image, for transitions and before-and-after shots.

## Reference images

Up to 9 images of characters, products, places or a look. Refer to them in the prompt as `@Image1`, `@Image2` and so on, in the order you sent them. The same references across several clips keep a character or product consistent.

## Good to know

- Most of the wait (2 to 6 minutes) is queueing; a 480p clip takes about as long as a 720p one.
- Prompts that may show real people or protected characters can be declined (`content_policy`); declined videos are free.
- Videos are kept for 30 days; download the ones you want to keep.

Full API details: [Video generation](https://zurelay.com/docs/video). Try it in the dashboard’s [Playground](https://zurelay.com/app/playground), which shows the code for each video.