Seedream 5.0 Pro

Seedream 5.0 Pro is ByteDance’s high-precision image generation and editing model, available through the AnyFast API. Use it for text-to-image, single-image editing, multi-reference image generation, and local edits that need explicit position or element control. Use model ID doubao-seedream-5-0-pro.

Key capabilities

Text-to-image — Generate one image from a text prompt.
Image-to-image — Pass one reference image with a prompt to edit or regenerate an image.
Multi-reference image generation — Pass up to 10 reference images with a prompt.
Interactive editing — Use natural language, marked regions, points, bounding boxes, arrows, or annotations to control where edits happen.
Native multilingual text — Generate text in languages such as Russian, Arabic, Filipino, Thai, Turkish, Korean, Malay, Spanish, Portuguese, Indonesian, French, German, Vietnamese, and Japanese.
Output control — Use size, response_format, output_format, and watermark to control the generated image.

Seedream 5.0 Pro does not support grouped image generation, web search, or streaming output. Do not rely on sequential_image_generation, sequential_image_generation_options, tools, or stream with this model.

Quick examples

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-pro",
    "prompt": "A high-end product hero image for a smart speaker, precise lighting, clean editorial layout, multilingual label text in Japanese and English",
    "size": "2K",
    "output_format": "png",
    "watermark": false
  }'

import requests

response = requests.post(
    "https://www.anyfast.ai/v1/images/generations",
    headers={
        "Authorization": "Bearer YOUR_API_KEY",
        "Content-Type": "application/json",
    },
    json={
        "model": "doubao-seedream-5-0-pro",
        "prompt": "A high-end product hero image for a smart speaker, precise lighting, clean editorial layout, multilingual label text in Japanese and English",
        "size": "2K",
        "output_format": "png",
        "watermark": False,
    },
)

print(response.json())

Image editing

Pass image as a URL, a Base64 data URI, or an array of image URLs/data URIs. Seedream 5.0 Pro supports up to 10 reference images.

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-pro",
    "prompt": "Edit the marked area and add a ceramic coffee cup with a saucer. Remove sketch lines and keep the original composition.",
    "image": "https://example.com/marked-reference.png",
    "size": "2K",
    "output_format": "png",
    "watermark": false
  }'

For coordinate-based edits, include <point> or <bbox> tags in the prompt. Coordinates should refer to the target image region.

{
  "model": "doubao-seedream-5-0-pro",
  "prompt": "Place the subject from image 1 <bbox>179 283 796 986</bbox> into image 2 <bbox>118 331 933 871</bbox>.",
  "image": [
    "https://example.com/source.png",
    "https://example.com/target.png"
  ],
  "size": "2K",
  "output_format": "png"
}

Input image limits

Seedream 5.0 Pro follows the official Seedream input image limits:

Supported formats: jpeg, png, webp, bmp, tiff, gif, heic, and heif.
Each image must be no larger than 30 MB.
Aspect ratio must be between 1/16 and 16.
Width and height must each be at least 14px.
Total pixels must be no more than 6000x6000 = 36,000,000 px.
You can pass up to 10 reference images.

Parameters

Parameter	Type	Required	Description
`model`	string	Yes	Must be `doubao-seedream-5-0-pro`
`prompt`	string	Yes	Text prompt for image generation or editing. Official guidance recommends keeping prompts concise enough that details do not get diluted.
`image`	string or array	No	Reference image URL/Base64 data URI, or an array of references. Required for image editing. Maximum 10 reference images.
`size`	string	No	Output size. Use `1K`, `2K`, or a pixel size such as `2048x1024`. Pixel sizes must satisfy the official total-pixel and aspect-ratio limits.
`response_format`	string	No	`url` or `b64_json`. Defaults to `url`. URLs are temporary and should be saved promptly.
`output_format`	string	No	`png` or `jpeg`. Defaults to `jpeg`.
`watermark`	boolean	No	Whether to add the AI-generated watermark. Official default is `true`; set `false` to disable it.
`optimize_prompt_options`	object	No	Prompt optimization options. Use `mode: "standard"`. Official documentation says fast mode is not supported for Seedream 5.0 Pro.

Size notes

Seedream 5.0 Pro supports two size styles:

Resolution tiers: 1K and 2K. Describe the aspect ratio in the prompt when using a tier.
Explicit pixels: widthxheight, such as 2048x1024. The official total pixel range is from 1280x720 to 2048x2048x1.1025, and the aspect ratio range is [1/16, 16].

API Reference

View the interactive API playground for Seedream 5.0 Pro.

​Key capabilities

​Quick examples

​Image editing

​Input image limits

​Parameters

​Size notes

API Reference

Key capabilities

Quick examples

Image editing

Input image limits

Parameters

Size notes