ByteDanceFastHigh

Seedance 1 Pro Fast

ByteDance's cinematic video generation model with fast generation speed and professional output quality.

190 credits

per video

Fast generation speed

Professional output quality

Cinematic video generation

Image-to-video support

5 or 10 second duration

Use with AI Assistant

Copy usage instructions for Claude, ChatGPT, or other AI

llms.txt

Quick Start

curl -X POST "https://api.core.today/v1/predictions" \
  -H "Content-Type: application/json" \
  -H "X-API-Key: cdt_your_api_key" \
  -d '{
  "model": "bytedance/seedance-1-pro-fast",
  "input": {
    "prompt": "A sports car drifting around a mountain curve, dust and gravel flying, dramatic low angle, cinematic motion blur, golden hour",
    "duration": "5",
    "aspect_ratio": "16:9"
  }
}'

Parameters

Parameter	Type	Required	Default	Description
`prompt`	string	Yes	-	Text description of the video to generate
`image_url`	string	No	-	Starting image URL for image-to-video
`duration`	integer	No	5	Video duration in seconds (5 or 10) 510
`aspect_ratio`	string	No	16:9	Output aspect ratio 16:99:161:1
`seed`	integer	No	-	Random seed for reproducibility

How to Provide File Input

There are 3 ways to provide files for the image_url parameter:

Recommended

Direct Upload (Multipart)

Attach files directly to POST /v1/predictions/upload. No separate upload step needed.

curl -X POST "https://api.core.today/v1/predictions/upload" \
  -H "X-API-Key: cdt_your_api_key" \
  -F "model=bytedance/seedance-1-pro-fast" \
  -F 'input={"prompt":"your prompt here"}' \
  -F "file:image_url=@your_file.png"

Image URL

Pass a publicly accessible URL directly. You can also use file_url from the Storage API.

{
  "model": "bytedance/seedance-1-pro-fast",
  "input": {
    "prompt": "your prompt here",
    "image_url": "https://example.com/image.jpg"
  }
}

See the File Upload docs for more upload methods including Presigned URLs.

Common Parameters

Common parameters used when calling POST /v1/predictions.

Parameter	Type	Required	Default	Description
`model`	string	Yes	-	Model identifier
`input`	object	Yes	-	Object containing the model-specific parameters from the table above
`output_folder`	string	No	-	Folder path for output files (max 256 chars, '..' not allowed)
`webhook_url`	string	No	-	Webhook URL to call on completion
`is_public`	boolean	No	false	If true, output files are also available via permanent public URLs

Examples

Quick Cinematic Shot

Fast cinematic video generation

curl -X POST "https://api.core.today/v1/predictions" \
  -H "Content-Type: application/json" \
  -H "X-API-Key: cdt_your_api_key" \
  -d '{
  "model": "bytedance/seedance-1-pro-fast",
  "input": {
    "prompt": "A sports car drifting around a mountain curve, dust and gravel flying, dramatic low angle, cinematic motion blur, golden hour",
    "duration": "5",
    "aspect_ratio": "16:9"
  }
}'

Social Media Vertical

Vertical video for social media

curl -X POST "https://api.core.today/v1/predictions" \
  -H "Content-Type: application/json" \
  -H "X-API-Key: cdt_your_api_key" \
  -d '{
  "model": "bytedance/seedance-1-pro-fast",
  "input": {
    "prompt": "Fresh strawberry falling into a glass of milk in slow motion, splash effect, clean white background, product photography style",
    "duration": "5",
    "aspect_ratio": "9:16"
  }
}'