ByteDance: Seedance 2.0 Fast (Text to Video) API Reference

About

ByteDance's most advanced text-to-video model, fast tier. Lower latency and cost with cinematic output, native audio, multi-shot editing, and director-level camera control.

1. Calling the API

Setup your API Key

To begin using Infron, you first need to create an account and generate your API Key.

Once you have your API key, set it as an environment variable in your runtime environment. This allows your applications to securely access Infron’s API.

export INFRON_KEY="YOUR_API_KEY"

Submit a request

For long-running requests, you can poll for results.

curl https://media.onerouter.pro/v1/videos/generations \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "model": "bytedance/seedance-2.0/fast/text-to-video",
  "prompt": "ltra high-end editorial photography, photorealistic, 8K, razor-sharp detail, perfect skin texture with natural pores and subsurface scattering, cinematic lighting, shot on medium format, Portrait: 31-year-old Black British architect in a cream blazer, standing in a brutalist concrete stairwell, soft directional skylight, composed posture, masterful color grading, natural catchlights in eyes, tactile fabric detail, magazine cover quality, no text, no logos, no watermarks.",
  "aspect_ratio": "16:9",
  "duration": "4",
  "resolution": "720p",
  "generate_audio": true,
  "n": 1,
  "seed": 123456
}'

Response with queue task id

The response will look like this:

{
  "code": 200,
  "message": "success",
  "data": {
    "task_id": "61e907f98079443bbdc83321688e62ac",
    "object": "video",
    "model": "bytedance/seedance-2.0/fast/text-to-video",
    "status": "created",
    "urls": {
      "query": "https://media.onerouter.pro/v1/videos/tasks/61e907f98079443bbdc83321688e62ac"
    },
    "created_at": "2026-06-02 14:47:48.69"
  }
}

Fetch request status

You can fetch the status of a request to check if it is completed or still in progress.

curl https://media.onerouter.pro/v1/videos/tasks/{task_id} \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" 

# For example
curl https://media.onerouter.pro/v1/videos/tasks/61e907f98079443bbdc83321688e62ac \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json"

Response with queue task status query

{
  "code": 200,
  "message": "success",
  "data": {
    "task_id": "61e907f98079443bbdc83321688e62ac",
    "object": "video",
    "model": "bytedance/seedance-2.0/fast/text-to-video",
    "status": "in_progress",
    "fail_reason": "",
    "submit_time": 1780411669,
    "start_time": 1780411669,
    "finish_time": 0,
    "outputs": [],
    "created_at": "2026-06-02 14:47:49"
  }
}

Possible statuses:

• created
• in_progress
• processing
• completed
• failed

created -> in_progress → processing → completed | failed

Poll every 1-2 seconds until status is "completed" or "failed"

Get the result (when status is "completed")

Once the request is completed, you can fetch the result. See the Output Schema for the expected result format.

{
  "code": 200,
  "message": "success",
  "data": {
    "task_id": "61e907f98079443bbdc83321688e62ac",
    "object": "video",
    "model": "bytedance/seedance-2.0/fast/text-to-video",
    "status": "completed",
    "fail_reason": "",
    "submit_time": 1780411669,
    "start_time": 1780411673,
    "finish_time": 1780411774,
    "outputs": [
      "https://storage.googleapis.com/infron_gcs/video%2Fvideo_v2%2Foutput%2Foutput_e52ae22a-fff4-4368-98cb-9619b87c4e32.mp4"
    ],
    "usage": {
      "completion_tokens": 87300,
      "duration": 4,
      "generate_audio": true,
      "output_count": 1,
      "prompt_tokens": 0,
      "request_num": 1,
      "resolution": "720p",
      "tokens": 87300,
      "total_tokens": 87300
    },
    "cost": {
      "total_cost": 0.48888,
      "cost_details": {
        "prompt_cost": 0,
        "completion_cost": 0,
        "image_cost": 0,
        "video_cost": 0.48888,
        "audio_cost": 0,
        "native_web_search_cost": 0,
        "plugin_web_search_cost": 0,
        "tools_cost": 0,
        "prompt_cache_read_cost": 0,
        "prompt_cache_write_cost": 0,
        "prompt_cache_write_5_min": 0,
        "prompt_cache_write_1_h": 0,
        "reasoning_cost": 0,
        "discount_rate": 1,
        "is_byok": false,
        "byok_cost": 0
      }
    },
    "created_at": "2026-06-02 14:47:49"
  }
}

2. Schema

Input

Example request

curl https://media.onerouter.pro/v1/videos/generations \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "model": "bytedance/seedance-2.0/fast/text-to-video",
  "prompt": "ltra high-end editorial photography, photorealistic, 8K, razor-sharp detail, perfect skin texture with natural pores and subsurface scattering, cinematic lighting, shot on medium format, Portrait: 31-year-old Black British architect in a cream blazer, standing in a brutalist concrete stairwell, soft directional skylight, composed posture, masterful color grading, natural catchlights in eyes, tactile fabric detail, magazine cover quality, no text, no logos, no watermarks.",
  "aspect_ratio": "16:9",
  "duration": "4",
  "resolution": "720p",
  "generate_audio": true,
  "n": 1,
  "seed": 123456
}'

Output

Example output

{
  "code": 200,
  "message": "success",
  "data": {
    "task_id": "61e907f98079443bbdc83321688e62ac",
    "object": "video",
    "model": "bytedance/seedance-2.0/fast/text-to-video",
    "status": "completed",
    "fail_reason": "",
    "submit_time": 1780411669,
    "start_time": 1780411673,
    "finish_time": 1780411774,
    "outputs": [
      "https://storage.googleapis.com/infron_gcs/video%2Fvideo_v2%2Foutput%2Foutput_e52ae22a-fff4-4368-98cb-9619b87c4e32.mp4"
    ],
    "usage": {
      "completion_tokens": 87300,
      "duration": 4,
      "generate_audio": true,
      "output_count": 1,
      "prompt_tokens": 0,
      "request_num": 1,
      "resolution": "720p",
      "tokens": 87300,
      "total_tokens": 87300
    },
    "cost": {
      "total_cost": 0.48888,
      "cost_details": {
        "prompt_cost": 0,
        "completion_cost": 0,
        "image_cost": 0,
        "video_cost": 0.48888,
        "audio_cost": 0,
        "native_web_search_cost": 0,
        "plugin_web_search_cost": 0,
        "tools_cost": 0,
        "prompt_cache_read_cost": 0,
        "prompt_cache_write_cost": 0,
        "prompt_cache_write_5_min": 0,
        "prompt_cache_write_1_h": 0,
        "reasoning_cost": 0,
        "discount_rate": 1,
        "is_byok": false,
        "byok_cost": 0
      }
    },
    "created_at": "2026-06-02 14:47:49"
  }
}

3. Detailed Pricing