> ## Documentation Index
> Fetch the complete documentation index at: https://docs.gengen.farm/llms.txt
> Use this file to discover all available pages before exploring further.

# Seedance 1.5 Pro

> Seedance 1.5 Pro video generation model for text-to-video, first-frame image-to-video, and first-and-last-frame image-to-video.

Seedance 1.5 Pro supports prompt-only video generation, first-frame image-to-video, and first-and-last-frame image-to-video. It can generate silent videos or synchronized audio when audio output is enabled.

Use Seedance 1.5 Pro when you need compatibility with the upstream ModelArk 1.5 video generation surface. Draft mode exists upstream, but GenGen does not expose draft creation in the API Explorer or Playground.

## Model ID

```text theme={"dark"}
seedance-1-5-pro-251215
```

Pass this exact public ID in the top-level `model` field. Do not substitute an upstream provider alias.

## Supported modes

* `text_to_video`
* `image_first_frame`
* `image_first_last_frame`

## Inputs

* `Image`
* `Text`

## Outputs

* `Video`

## Capabilities

* `Text-to-video`
* `Image-to-video`

## Technical details

| Property          | Value                                       |
| ----------------- | ------------------------------------------- |
| Provider          | `byteplus-modelark`                         |
| Modality          | `video`                                     |
| Processing        | `Asynchronous task`                         |
| Endpoint          | `/api/gengen/v1/contents/generations/tasks` |
| Durations         | `4, 5, 6, 7, 8, 9, 10, 11, 12`              |
| Resolutions       | `480p, 720p, 1080p`                         |
| Aspect ratios     | `21:9, 16:9, 4:3, 1:1, 3:4, 9:16, adaptive` |
| Frame rate        | `24 fps`                                    |
| Concurrency       | `25 concurrent tasks`                       |
| Audio generation  | `Supported`                                 |
| Watermark control | `Supported`                                 |

<Note>
  Availability and final customer prices can change. Check the [Dashboard model catalog](https://gengen.farm/dashboard?section=models) before production use.
</Note>

See the [API reference overview](/api-reference/introduction) for authentication, request conventions, and response schemas.