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

# Seedance 2.0 Fast · Text to video

> Fast version of Seedance 2.0 with quicker generation times, supporting up to 15s video with synchronized audio.

[← Seedance](/api-documentation/ai-generation/models/seedance)

**Model name:** `bytedance/seedance-2.0/fast/text-to-video`\
**Generation type:** `text_to_video`\
**Endpoint:** [`POST /api/asset_generator/`](/api-reference/ai-generation/post-ai-generation)

## Pricing

| Duration | 480p | 720p |
| - | - | - |
| 4s | **2.25** | **5** |
| 5s | **2.75** | **6.25** |
| 6s | **3.25** | **7.5** |
| 7s | **4** | **8.5** |
| 8s | **4.5** | **9.75** |
| 9s | **5** | **11** |
| 10s | **5.5** | **12.25** |
| 11s | **6** | **13.5** |
| 12s | **6.5** | **14.75** |
| 13s | **7** | **15.75** |
| 14s | **7.75** | **17** |
| 15s | **8.25** | **18.25** |

Prices are per output. When a request asks for several outputs, the charge is this price times the number of outputs.

## Quick start

<CodeGroup>
  ```bash cURL theme={null}
  curl --request POST \
    --url https://api.creatify.ai/api/asset_generator/ \
    --header 'Content-Type: application/json' \
    --header 'X-API-ID: your-api-id' \
    --header 'X-API-KEY: your-api-key' \
    --data '{
      "model_name": "bytedance/seedance-2.0/fast/text-to-video",
      "input_params": {
        "prompt": "A slow cinematic tracking shot along a sunlit coastal road."
      }
    }'
  ```

  ```python Python theme={null}
  import requests

  response = requests.post(
      "https://api.creatify.ai/api/asset_generator/",
      headers={"X-API-ID": "your-api-id", "X-API-KEY": "your-api-key"},
      json={
          "model_name": "bytedance/seedance-2.0/fast/text-to-video",
          "input_params": {
              "prompt": "A slow cinematic tracking shot along a sunlit coastal road."
          },
      },
  )
  print(response.json()["id"])
  ```
</CodeGroup>

## Input parameters

Send these fields in `input_params`.

<ParamField body="prompt" type="string" required>
  The text prompt used to generate the video

  Maximum characters: `5000`.
</ParamField>

<ParamField body="seed" type="integer">
  Random seed to control video generation. Use -1 for random.

  Minimum: `-1`.
  Maximum: `4294967295`.
</ParamField>

<ParamField body="duration" type="string" default={"auto"}>
  Duration of the video in seconds

  Allowed values: `"auto"`, `"4"`, `"5"`, `"6"`, `"7"`, `"8"`, `"9"`, `"10"`, `"11"`, `"12"`, `"13"`, `"14"`, `"15"`.
</ParamField>

<ParamField body="resolution" type="string" default={"720p"}>
  Video resolution

  Allowed values: `"480p"`, `"720p"`.
</ParamField>

<ParamField body="aspect_ratio" type="string" default={"16:9"}>
  The aspect ratio of the generated video

  Allowed values: `"auto"`, `"21:9"`, `"16:9"`, `"4:3"`, `"1:1"`, `"3:4"`, `"9:16"`.
</ParamField>

<ParamField body="generate_audio" type="boolean" default={true}>
  Whether to generate audio for the video
</ParamField>

<Accordion title="Complete JSON schema">
  ```json theme={null}
  {
    "$schema": "http://json-schema.org/draft-07/schema#",
    "required": [
      "prompt"
    ],
    "properties": {
      "seed": {
        "type": "integer",
        "title": "Seed",
        "minimum": -1,
        "maximum": 4294967295,
        "description": "Random seed to control video generation. Use -1 for random.",
        "x-advance-settings": true
      },
      "prompt": {
        "type": "string",
        "title": "Prompt",
        "maxLength": 5000,
        "description": "The text prompt used to generate the video"
      },
      "duration": {
        "enum": [
          "auto",
          "4",
          "5",
          "6",
          "7",
          "8",
          "9",
          "10",
          "11",
          "12",
          "13",
          "14",
          "15"
        ],
        "type": "string",
        "title": "Duration",
        "default": "auto",
        "description": "Duration of the video in seconds"
      },
      "resolution": {
        "enum": [
          "480p",
          "720p"
        ],
        "type": "string",
        "title": "Resolution",
        "default": "720p",
        "description": "Video resolution",
        "x-advance-settings": true
      },
      "aspect_ratio": {
        "enum": [
          "auto",
          "21:9",
          "16:9",
          "4:3",
          "1:1",
          "3:4",
          "9:16"
        ],
        "type": "string",
        "title": "Aspect Ratio",
        "default": "16:9",
        "description": "The aspect ratio of the generated video"
      },
      "generate_audio": {
        "type": "boolean",
        "title": "Generate Audio",
        "default": true,
        "description": "Whether to generate audio for the video",
        "x-advance-settings": true
      }
    }
  }
  ```
</Accordion>

## Response

The request returns the task with `status: "initializing"`. Poll [GET /api/asset\_generator/\{id}/](/api-reference/ai-generation/get-ai-generation-) until `status` is `done` or `failed`, or pass a `webhook_url` to be notified. A finished task lists its files in `assets` and the credits it charged in `credits_used`.


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