ByteDance Image

Seedream 4.0

High-quality image generation model from ByteDance

2K Max resolution

1:1, 16:9, 9:16 Formats

Async Mode

Get API key — free View docs →

Model ID seedream-4.0 /v1/images/generations

Our pricing –20% vs official

Per image pay-as-you-go

$0.030 $0.024

Pay-as-you-go · No minimums · Cancel anytime

OpenAI-compatible ( api.belugapi.com/v1)

Async generation with task tracking & webhooks

Start for free →

No credit card required to test

Capabilities

What Seedream 4.0
can do for you.

Native API parity with the official provider — every feature surfaced one-to-one.

Async generation

Submit and poll, no long-lived connections needed

Content safety

Built-in moderation pipeline for compliance

Integration

2-line migration.
Zero friction.

BelugAPI is 100 % compatible with the OpenAI SDK. Point base_url to our endpoint and you're done — no refactoring, no learning curve.

Same request & response schema

Python · Node.js · REST · Go · Ruby

Synchronous & async invocation modes

Automatic failover & load balancing

Python

from openai import OpenAI

client = OpenAI(
  api_key=bel-your-key,
  base_url=https://api.belugapi.com/v1
)

img = client.images.generate(
  model=seedream-4.0,
  prompt=A photorealistic beluga whale playing a piano under aurora borealis,
  size=1024x1024,
  n=1
)
print(img.data[0].url)

Node.js

import OpenAI from openai;

const client = new OpenAI({
  apiKey:  bel-your-key,
  baseURL: https://api.belugapi.com/v1,
});

const res = await client.images.generate({
  model:  seedream-4.0,
  prompt: A photorealistic beluga whale playing a piano under aurora borealis,
  size:   1024x1024,
});
console.log(res.data[0].url);

cURL

curl https://api.belugapi.com/v1/v1/images/generations \
  -H Authorization: Bearer bel-your-key \
  -H Content-Type: application/json \
  -d {"model":"seedream-4.0","prompt":"A photorealistic beluga whale...","size":"1024x1024"}

Highlights

Built for production.

Text-to-image

High quality

Complete guide

Everything about
Seedream 4.0.

Specifications, pricing, capabilities, and integration tips — kept up to date with every ByteDance release.

By ByteDance 2 min read Updated May 2026

High-quality image generation model from ByteDance

Overview

Seedream 4.0 is a cutting-edge ai image generator developed by ByteDance, designed to push the boundaries of artificial intelligence-powered content generation.

This model excels in text-to-image, high quality, making it a top choice for professionals seeking high-quality, scalable AI solutions. Whether you're building production applications, researching new AI capabilities, or creating stunning visual content, Seedream 4.0 delivers industry-leading performance and reliability.

Key Specifications

Specification	Details
Model Name	Seedream 4.0
Provider	ByteDance
Category	AI Image Generator
Model Type	Text To Image
Resolutions	1K, 2K
Supported Formats	1:1, 16:9, 9:16, 4:3, 3:4

Pricing

Note: Pricing available on BelugAPI dashboard

Key Features & Capabilities

Text To Image: Advanced capability for professional-grade output.
High Quality: Advanced capability for professional-grade output.

Use Cases & Applications

Marketing campaign visuals
Product photography generation
Social media content creation
Concept art and storyboarding

Frequently asked questions

What is Seedream 4.0 best used for?

Seedream 4.0 excels at text-to-image, high quality, making it ideal for professional and enterprise applications.

Who developed Seedream 4.0?

Seedream 4.0 was developed by ByteDance, a leading AI research and development company.

How do I integrate Seedream 4.0 into my application?

You can integrate Seedream 4.0 via its official API endpoint using standard HTTP requests with your API key. SDKs are available for Python, JavaScript, and other languages.

What is the pricing model for Seedream 4.0?

Pricing is based on note. Check the pricing section above for detailed rates.

Ready to ship? Start using Seedream 4.0 in under 30 seconds.

Get free API key