ByteDance: Seedream 5.0 Pro (Text to Image) API Reference

About

ByteDance's Seedream 5.0 Pro is flagship text-to-image model, with deep-thinking prompt understanding, native text in 14 languages, and precise control over dense layouts and structured designs.

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/images/generations \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "model": "bytedance/seedream-5.0/text-to-image",
  "prompt": "Vibrant editorial of a model in contemporary fashion fused with West African textile patterns and beadwork, Campbell Addy bold aesthetic, saturated palette, dramatic studio lighting, celebratory cultural richness, striking contemporary portraiture.",
  "size": "1296x3568",
  "n": 1
}'

Response with queue task id

The response will look like this:

{
  "code": 200,
  "message": "success",
  "data": {
    "task_id": "2026072304533721639589409gmhc6T",
    "object": "image",
    "model": "bytedance/seedream-5.0/text-to-image",
    "status": "created",
    "urls": {
      "query": "https://media.onerouter.pro/v1/images/tasks/2026072304533721639589409gmhc6T"
    },
    "created_at": "2026-07-23 04:53:37.26"
  }
}

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/images/tasks/{task_id} \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" 

# For example
curl https://media.onerouter.pro/v1/images/tasks/2026072304533721639589409gmhc6T \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json"

Response with queue task status query

{
  "code": 200,
  "message": "success",
  "data": {
    "task_id": "2026072304533721639589409gmhc6T",
    "object": "image",
    "model": "bytedance/seedream-5.0/text-to-image",
    "status": "in_progress",
    "fail_reason": "",
    "submit_time": 1784782417,
    "start_time": 1784782417,
    "finish_time": 0,
    "outputs": [],
    "created_at": "2026-07-23 04:53:37"
  }
}

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": "2026072304533721639589409gmhc6T",
    "object": "image",
    "model": "bytedance/seedream-5.0/text-to-image",
    "status": "completed",
    "fail_reason": "",
    "submit_time": 1784782417,
    "start_time": 1784782417,
    "finish_time": 1784782582,
    "outputs": [
      "https://infron.ai/cdn/media/image/generated/official_byteplus_image_5ca78e53ee2344b7880f87e849936b4b.jpeg"
    ],
    "usage": {
      "completion_tokens": 18063,
      "image_count": 1,
      "image_quality": "",
      "prompt_tokens": 0,
      "size": "1296x3568",
      "total_tokens": 18063,
      "web_search": false
    },
    "cost": {
      "total_cost": 0.09,
      "cost_details": {
        "prompt_cost": 0,
        "completion_cost": 0,
        "image_cost": 0.09,
        "video_cost": 0,
        "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": "2026-07-23 04:53:37"
  }
}

2. Schema

Input

Example request

curl https://media.onerouter.pro/v1/images/generations \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "model": "bytedance/seedream-5.0/text-to-image",
  "prompt": "Vibrant editorial of a model in contemporary fashion fused with West African textile patterns and beadwork, Campbell Addy bold aesthetic, saturated palette, dramatic studio lighting, celebratory cultural richness, striking contemporary portraiture.",
  "size": "1296x3568",
  "n": 1
}'

Output

Example output

{
  "code": 200,
  "message": "success",
  "data": {
    "task_id": "2026072304533721639589409gmhc6T",
    "object": "image",
    "model": "bytedance/seedream-5.0/text-to-image",
    "status": "completed",
    "fail_reason": "",
    "submit_time": 1784782417,
    "start_time": 1784782417,
    "finish_time": 1784782582,
    "outputs": [
      "https://infron.ai/cdn/media/image/generated/official_byteplus_image_5ca78e53ee2344b7880f87e849936b4b.jpeg"
    ],
    "usage": {
      "completion_tokens": 18063,
      "image_count": 1,
      "image_quality": "",
      "prompt_tokens": 0,
      "size": "1296x3568",
      "total_tokens": 18063,
      "web_search": false
    },
    "cost": {
      "total_cost": 0.09,
      "cost_details": {
        "prompt_cost": 0,
        "completion_cost": 0,
        "image_cost": 0.09,
        "video_cost": 0,
        "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": "2026-07-23 04:53:37"
  }
}

3. Detailed Pricing