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

# Seedance 1.0 Pro Fast

> Seedance 1.0 Pro Fast text-to-video and image-to-video. Pass `image_url` for a first-frame image, or omit it for pure text-to-video.

**Pricing** — per second of generated video, in tokens (USD at $0.02/token):

| resolution | tokens/s | USD/s |
|---|---|---|
| 480p | 0.3 | $0.006 |
| 720p | 0.69 | $0.0138 |
| 1080p | 1.5 | $0.03 |

Example: a 5s 720p video costs 3.45 tokens.

Returns an `img_uuid`; poll GET /api/v1/jobs/detail (or use `custom_callback_url`) to get the generated video.



## OpenAPI

````yaml api-reference/video-generations/openapi-seedance-pro-fast.json POST /api/v1/videos/generations
openapi: 3.1.0
info:
  title: GoEnhance API - Seedance 1.0 Pro Fast
  description: Text-to-video and image-to-video with Seedance 1.0 Pro Fast.
  version: 1.0.0
servers:
  - url: https://api.goenhance.ai
security: []
paths:
  /api/v1/videos/generations:
    post:
      tags:
        - VideoGenerations
      summary: Seedance 1.0 Pro Fast
      description: >-
        Seedance 1.0 Pro Fast text-to-video and image-to-video. Pass `image_url`
        for a first-frame image, or omit it for pure text-to-video.


        **Pricing** — per second of generated video, in tokens (USD at
        $0.02/token):


        | resolution | tokens/s | USD/s |

        |---|---|---|

        | 480p | 0.3 | $0.006 |

        | 720p | 0.69 | $0.0138 |

        | 1080p | 1.5 | $0.03 |


        Example: a 5s 720p video costs 3.45 tokens.


        Returns an `img_uuid`; poll GET /api/v1/jobs/detail (or use
        `custom_callback_url`) to get the generated video.
      parameters:
        - name: Authorization
          in: header
          description: ''
          required: false
          example: '{{Authorization}}'
          schema:
            type: string
      requestBody:
        content:
          application/json:
            schema:
              type: object
              properties:
                model:
                  type: string
                  enum:
                    - seedance-pro-fast
                  description: Model name. Must be `seedance-pro-fast`.
                prompt:
                  type: string
                  description: Text prompt describing the video.
                image_url:
                  type: string
                  format: uri
                  description: >-
                    Optional first-frame image URL. If provided, runs
                    image-to-video; otherwise text-to-video.
                duration:
                  type: integer
                  minimum: 2
                  maximum: 12
                  default: 5
                  description: Video duration in seconds (2-12).
                resolution:
                  type: string
                  enum:
                    - 480p
                    - 720p
                    - 1080p
                  default: 480p
                  description: Output resolution.
                ratio:
                  type: string
                  enum:
                    - '16:9'
                    - '9:16'
                    - '1:1'
                    - '4:3'
                    - '3:4'
                    - '21:9'
                    - adaptive
                  default: '16:9'
                  description: >-
                    Aspect ratio. Text-to-video only; ignored when image_url is
                    provided.
                custom_callback_url:
                  type: string
                  format: uri
                  description: >-
                    Optional. A publicly accessible HTTPS URL. When the task
                    status changes (processing / success / failed), GoEnhance
                    sends a POST request to this URL. The request body is
                    identical to the response of GET /api/v1/jobs/detail. If
                    your server does not respond with HTTP 200, the notification
                    is retried up to 3 times, with a 3-second timeout per
                    attempt.
                  example: https://your-server.com/goenhance/callback
              required:
                - model
                - prompt
            example:
              model: seedance-pro-fast
              prompt: A hot air balloon rising over misty mountains at dawn
              duration: 5
              resolution: 480p
      responses:
        '200':
          description: ''
          content:
            application/json:
              schema:
                type: object
                properties:
                  code:
                    type: integer
                  msg:
                    type: string
                  data:
                    type: object
                    properties:
                      img_uuid:
                        type: string
                    required:
                      - img_uuid
                required:
                  - code
                  - msg
                  - data
              examples:
                '1':
                  summary: Success
                  value:
                    code: 0
                    msg: Success
                    data:
                      img_uuid: c12b656c-747a-44fd-9c80-add79b0c52d5
                '2':
                  summary: Insufficient tokens
                  value:
                    code: 100
                    msg: tokens is not enough
          headers: {}
        '401':
          description: ''
          content:
            application/json:
              schema:
                type: object
                properties:
                  code:
                    type: integer
                  msg:
                    type: string
                required:
                  - code
                  - msg
          headers: {}
      deprecated: false
      security: []

````