RealRelay.ai
ByteDance

Seedream 4.0 (250828)

ByteDance image generation model for text-to-image, multi-reference editing and batch image generation.

Starting at
Per image
$0.03/ image
Open dashboard

Channel

Each channel is compared at its lowest input-price tier; output breaks ties. A dash means /api/pricing does not provide that rate. Selecting a channel updates the endpoints and call example below.

byteplus/seedream-4-0-250828
Per image
$0.03/ image

Endpoints

POST/v1/images/generationsImage generation
POST/v1/chat/completionsChat Completions

Call it

Using byteplus/seedream-4-0-250828

1from openai import OpenAI23client = OpenAI(4    base_url="https://www.realrelay.ai/v1",5    api_key="sk-***",6)78image = client.images.generate(9    model="byteplus/seedream-4-0-250828",10    prompt="A quiet reading room at golden hour",11)1213print(image.data[0].url)
1import OpenAI from "openai";23const client = new OpenAI({4  baseURL: "https://www.realrelay.ai/v1",5  apiKey: process.env.REALRELAY_API_KEY,6});78const image = await client.images.generate({9  model: "byteplus/seedream-4-0-250828",10  prompt: "A quiet reading room at golden hour",11});1213console.log(image.data[0].url);
1curl https://www.realrelay.ai/v1/images/generations \2  -H "Authorization: Bearer $REALRELAY_API_KEY" \3  -H "Content-Type: application/json" \4  -d '{5    "model": "byteplus/seedream-4-0-250828",6    "prompt": "A quiet reading room at golden hour"7  }'

Prices and availability as published on Oct 12, 2026.

Capabilities

Seedream 4.0 (250828) accepts text and image input and returns images. Single-image modes are text-to-image, single-image-to-image and multi-reference image-to-image, where several reference images guide one result.

Batch image generation produces a set of images in one request, from text, from a single image or from multiple reference images.

Text to imageImage to image
Input
TextImage
Output
Image

Overview

Seedream 4.0 (250828) is an image generation model from ByteDance. BytePlus lists single-image generation, covering text-to-image, single-image-to-image and multi-reference image-to-image, and batch generation from text, from a single image or from multiple reference images. It returns images that follow the written prompt and any reference pictures supplied.

It accepts text and image input and returns images. It was released on August 28, 2025.

Pricing

Seedream 4.0 (250828) is priced at $0.03 per image.

Seedream 4.0 (250828) is available through RealRelay's OpenAI-compatible API.

Use cases

Use Seedream 4.0 (250828) for product imagery and marketing visuals, generating images from a text description or restyling a product photo supplied as a reference.

Batch generation suits producing a consistent set of variations at once, such as a series of poster concepts, and multi-reference input helps combine a character, a style and a scene in one image.

Frequently asked questions

What is Seedream 4.0 (250828)?
Seedream 4.0 (250828) is a ByteDance image generation model that supports text-to-image, single-image and multi-reference image-to-image, and batch image generation.
How much does Seedream 4.0 (250828) cost?
Seedream 4.0 (250828) costs $0.03 per image through RealRelay's OpenAI-compatible API.
What inputs and outputs does Seedream 4.0 (250828) support?
Seedream 4.0 (250828) accepts text and image input and returns images.
Can Seedream 4.0 (250828) generate several images at once?
Yes. BytePlus lists batch image generation for Seedream 4.0 (250828), from text, from a single image or from multiple reference images.
When was Seedream 4.0 (250828) released?
Seedream 4.0 (250828) was released on August 28, 2025.
How do I call Seedream 4.0 (250828) via the API?
Send requests to RealRelay's OpenAI-compatible API with the model ID byteplus/seedream-4-0-250828 to use Seedream 4.0 (250828).

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