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Generate images using ByteDance SeeDream 5.0 Pro. Supports text-to-image and image editing with up to 10 reference images, 8 aspect ratios, and resolution tiers up to 2K.

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Model

bytedance/seedream-5.0-pro

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Parameters

ParameterTypeRequiredDefaultDescription
promptstringYes—Text prompt describing the desired image (max 6000 chars). Recommended: ≤ 300 Chinese characters or ≤ 600 English words
aspect_ratiostringNo"1:1"1:1, 4:3, 3:4, 16:9, 9:16, 3:2, 2:3, 21:9. Combined with resolution to pick the output pixel size (e.g. 2K + 16:9 → 2624x1472)
image_urlsstring[]NonullReference image URLs for image editing (max 10). Omit for text-to-image. Max 10 MB each; max 36,000,000 pixels; min side > 14 px; aspect ratio 1/16–16. Formats: jpeg, jpg, png, webp, bmp, tiff, gif, heic, heif
resolutionstringNo"2K"1K, 1.5K, 2K (case-insensitive)
output_formatstringNo"png"jpeg, jpg, png

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Example - Text-to-Image

curl -X POST https://api.unifically.com/v1/tasks \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -d '{
    "model": "bytedance/seedream-5.0-pro",
    "input": {
      "prompt": "A cyberpunk city at sunset, neon lights reflecting on wet streets",
      "aspect_ratio": "16:9",
      "resolution": "2K"
    }
  }'

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Example - Image-to-Image

curl -X POST https://api.unifically.com/v1/tasks \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -d '{
    "model": "bytedance/seedream-5.0-pro",
    "input": {
      "prompt": "Place the animal inside the vintage car",
      "image_urls": [
        "https://example.com/animal.jpg",
        "https://example.com/car.jpg"
      ],
      "resolution": "2K"
    }
  }'
SeeDream 5.0 Pro generates exactly one image per request — it has no sequential mode. The max_sequential_images and web_search parameters available on SeeDream 5.0 Lite are rejected on this model.

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Response

{
  "code": 200,
  "success": true,
  "data": {
    "task_id": "9d489f02-316f-4386-8188-dc19540d56f5",
    "status": "completed",
    "output": {
      "image_urls": [
        "https://files.unifically.com/image/92116e95-8dd4-4cbb-b53f-ee643e1045d8.png"
      ]
    }
  }
}