Seedream 5.0 i2i

ByteDance Seedream 5.0 image-to-image model. Generate images from reference images with text prompts.

Seedream 5.0 i2i is an image-to-image generation model from ByteDance’s Seedream series, available through Anyfast API.

When using external image URLs as reference images, if Volcengine takes more than 10 seconds to download the image, the request will fail with a timeout error. Use image URLs hosted on fast, reliable CDNs, or pass large images as Base64-encoded data URIs instead.

Key capabilities

• Image-to-Image — Generate images with reference images and text prompts
• Sequential Generation — Batch generate multiple images in one request
• Custom Size — Flexible output sizes
• Watermark Control — Optional watermark and logo configuration

Quick example

cURL

curl https://www.anyfast.ai/v1/images/generations \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "doubao-seedream-5-0-260128",
    "prompt": "A girl and a cow doll happily riding a roller coaster, morning, noon, and night",
    "image": ["https://example.com/ref1.png", "https://example.com/ref2.png"],
    "sequential_image_generation": "auto",
    "sequential_image_generation_options": {
      "max_images": 3
    },
    "size": "2K",
    "watermark": false
  }'

Parameters

Parameter	Type	Required	Description
model	string	Yes	Must be doubao-seedream-5-0-260128
prompt	string	Yes	Text prompt for image generation
image	array	Yes	Array of reference image URLs
sequential_image_generation	string	No	Set to auto to enable batch generation
sequential_image_generation_options	object	No	Options: max_images (int)
size	string	No	Output image size, e.g. 1024x1024, 2K
watermark	boolean	No	Default: false
seed	integer	No	Random seed for reproducibility
logo_info	object	No	Logo config: add_logo, position, language, opacity

API Reference

View the interactive API playground for Seedream 5.0 i2i.