SeeDance 2.5 Draft - Unifically

Try ideas cheaply with a 480p SeeDance 2.5 draft. When you like a result, render that exact video at 1080p by passing the draft’s task ID.

The 480p and 1080p versions are both generated natively from the same task, without any external upscaler. The 1080p render keeps the draft’s prompt, duration, aspect ratio, and references.

Model

bytedance/seedance-2.5-draft

How it works

Draft: send a normal SeeDance 2.5 request. The output is always 480p.
Render in 1080p: when the draft is completed, send a new request with only draft_task_id set to the draft’s task_id. All other fields are ignored, because everything comes from the draft.

Step	Required inputs	Output
Draft	Same as SeeDance 2.5 (`prompt`, frames, or references)	480p video
Render in 1080p	`draft_task_id`	1080p video, same length as the draft

720p and 4K renders from a draft are coming soon. In the playground, choose Draft on the SeeDance 2.5 page and paste a finished draft’s task ID into Draft Task ID.

Parameters

Parameter	Type	Required	Default	Description
`draft_task_id`	string	No	`null`	Task ID of a completed `bytedance/seedance-2.5-draft` task. When set, that draft is rendered at 1080p and every other field is ignored
`prompt`	string	Conditional	`""`	Creative description (max 5,000 characters). Required for text-to-video and multimodal reference drafts. Reference media as `[Image1]`, `[Video1]`, or `[Audio1]`
`resolution`	string	No	`"480p"`	Drafts are `480p` only
`duration`	integer	No	`4`	Output duration in whole seconds (4–30)
`aspect_ratio`	string	No	`"adaptive"`	`adaptive`, `1:1`, `3:4`, `4:3`, `9:16`, `16:9`, or `21:9`. Must be `adaptive` for first/last frame requests
`generate_audio`	boolean	No	`true`	Generate synchronized voice, sound effects, and background music
`seed`	integer	No	Random	Seed from `-1` to `2147483647`
`first_frame_url`	string	Conditional	`null`	First frame image URL. Must be provided together with `last_frame_url`
`last_frame_url`	string	Conditional	`null`	Last frame image URL. Must be provided together with `first_frame_url`
`image_urls`	string[]	No	`null`	Up to 30 reference image URLs
`video_urls`	string[]	No	`null`	Up to 10 reference video URLs, up to 30 seconds combined
`audio_urls`	string[]	No	`null`	Up to 10 reference audio URLs, up to 30 seconds combined

The draft accepts the same inputs and limits as SeeDance 2.5.

Example - Draft

curl -X POST https://api.unifically.com/v1/tasks \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -d '{
    "model": "bytedance/seedance-2.5-draft",
    "input": {
      "prompt": "A cinematic tracking shot through a bustling night market in the rain",
      "aspect_ratio": "16:9",
      "duration": 8
    }
  }'

Example - Render the Draft in 1080p

curl -X POST https://api.unifically.com/v1/tasks \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -d '{
    "model": "bytedance/seedance-2.5-draft",
    "input": {
      "draft_task_id": "abc123def456"
    }
  }'

The draft must be completed. A draft can be rendered in 1080p more than once; each render is a new task.

Response

{
  "code": 200,
  "success": true,
  "data": {
    "task_id": "abc123def456",
    "status": "processing"
  }
}

Volume discounts are available for almost all models. Reach out at contact@unifically.com to discuss custom pricing.

​Model

​How it works

​Parameters

​Example - Draft

​Example - Render the Draft in 1080p

​Response

Model

How it works

Parameters

Example - Draft

Example - Render the Draft in 1080p

Response