▥ Seedance 2.5 is here! ›
Seedream 4.0

Seedream 4.0

ByteDance Seedream 4.0 for text-to-image generation from 1K to 4K.

Warm Official Live Priced by route Data privacy Zero training API docs

Input

prompt*string

A text description of the image you want to generate

route_modestring

Choose the provider route used for this request.

Lower-cost official route and the default for new requests and API keys.
generation_typestring

Select the generation workflow. The API mode updates with this choice.

aspect_ratiostring

Aspect ratio of the generated output

Default: "auto"
resolutionstring

Higher resolutions may take longer to generate.

Default: "1K"
output_formatstring

Format of the output image

countinteger

Number of output images

Indicative cost$0.09 / image · 1K · fixed price≈ $0.09 for 1 image · official-cheap · 1KBoth routes are billed on the tokens the model returns: official at the provider's published rates, official-cheap at 50% of them. If no usage is returned, the per-image price applies.

Output

Ready for a predictionAdjust the inputs, then run the model.

Examples

View more examples ↗

Pricing

Choose the same two routing tiers used across MLMux. The selected route is included as route_mode in every request.

Learn more about pricing ↗

Readme

Seedream 4.0 is available through MLMux with one request shape and two explicit route tiers.

Generate from a prompt

Describe a scene, product, or layout in plain language and get an image back in one request.

1K to 4K at one price

Pick a square, landscape, portrait, or 4:3 image at 1K, 2K, or 4K. Every image costs the same at any size.

Choosing a Seedream model

Seedream 4.0 is the only Seedream model on MLMux with 1K output; 4.5, 5.0, and 5 Pro start at 2K. All four cost the same per image.

Frequently asked questions

What is Seedream 4.0?

Seedream 4.0 is an image generation model from ByteDance. On MLMux you can run it in the browser or call it through one API. ByteDance Seedream 4.0 for text-to-image generation from 1K to 4K.

How do I use the Seedream 4.0 API?

Create an API key in the MLMux Console, then send a POST request to https://api.mlmux.com/v1/images/generations with the key in the Authorization header and model set to weavy/doubao-seedream-4-0-250828. The generated images are returned in the response.

What can Seedream 4.0 do?

Generation modes: Text to image. Each request returns 1K, 2K, or 4K images in aspect ratios such as 1:1, 16:9, 9:16, 4:3, and 3:4. Reference images and image editing are not available for Seedream 4.0 on MLMux yet.

How much does Seedream 4.0 cost?

MLMux is pay as you go, with no subscription or monthly fee, and 1 credit equals 1 US dollar. Every Seedream 4.0 image costs $0.09 on the default official-cheap route and $0.16 on the official route, at any resolution it supports. The prices are also listed in the pricing section of this page.

Can I try Seedream 4.0 without writing code?

Yes. Sign in and use the playground at the top of this page to run Seedream 4.0 with the same settings as the API. The API tab shows the matching request in Node.js, Python, and HTTP.

More image models

Explore all models ↗
Nano Banana 2.1
Nano Banana 2.1

Image generation and editing with reference-guided workflows.

Nano Banana 2
Nano Banana 2

Fast image generation and editing.

Nano Banana Pro
Nano Banana Pro

Professional image generation.

GPT Image 2
GPT Image 2

Detailed generation and editing for text-rich visual work.

GPT Image 2.5 Flare
GPT Image 2.5 Flare

High-fidelity image generation.

GPT Image 2.5 Sunburst
GPT Image 2.5 Sunburst

High-fidelity image generation.

Seedream 4.5
Seedream 4.5

Detailed image generation.

Seedream 5.0
Seedream 5.0

Professional image generation.

Seedream 5 Pro
Seedream 5 Pro

Professional image generation.

Nano Banana
Nano Banana

Fast image generation.

Nano Banana 2 Lite
Nano Banana 2 Lite

Efficient image generation.