Overview

Seedream 5.0 Lite provides high-quality image generation from text prompts, with optional image references for editing. It supports 2K and 3K output resolutions and is delivered synchronously (no polling required).

Currently available models

Model	Content moderation
`seedream-5-lite`	Strict
`seedream-5-lite-less-restriction`	Less restrictive

The -less-restriction variant applies a more permissive content review. It accepts exactly the same input schema as the strict model but bills at a +25% markup. See Content Moderation below.

Pricing

Model	Size	Price per image
seedream-5-lite	2K (default)	$0.028
seedream-5-lite	3K	$0.042
seedream-5-lite-less-restriction	2K (default)	$0.035
seedream-5-lite-less-restriction	3K	$0.0525

3K is priced at 1.5× the 2K rate within the same tier.

The -less-restriction variant is priced at a +25% markup over the strict variant at the same size.

Parameters

size

Controls output resolution. Accepted values: 2K (default) or 3K.

aspect_ratio

Supported ratios: 1:1, 16:9, 9:16, 4:3, 3:4, 3:2, 2:3, 4:5, 5:4, 21:9. Default: 1:1.

The upstream API does not accept an aspect_ratio field directly; this engine encodes the requested ratio into the pixel dimensions sent upstream.

output_format

Output image format. Accepted values: jpeg (default), png, webp.

image_urls

Optional. Provide up to 10 image URLs to use as references for editing / style transfer. Use publicly accessible URLs (CDN or cloud storage); signed/expiring URLs may fail.

sequential_image_generation (advanced)

disabled (default) or auto. When auto, supply max_images (1–15) to control batch size; the model will return multiple related images in a single request.

Content moderation

Both models apply content moderation. Submissions found to contain disallowed content are rejected and your credits are refunded.

seedream-5-lite (strict) applies our standard content review.

seedream-5-lite-less-restriction applies a more permissive content review. A rejection is final and is not retried — your credits are refunded and the task ends with a content-violation error.

Response

Seedream is delivered synchronously. The response contains the generated image URLs directly — no polling is required.

Tips

Use publicly accessible URLs for any reference images.

For 3K output, expect slightly longer generation times than 2K.

The output is one or more images (not video).

Request

Header Params

Body Params application/json

Examples

text to imageimage edit

{
    "model": "seedream",
    "task_type": "seedream-5-lite",
    "input": {
        "prompt": "A golden retriever playing in a field of sunflowers at sunset",
        "aspect_ratio": "16:9",
        "output_format": "png",
        "size": "2K"
    }
}

Request Code Samples

Shell

JavaScript

Java

Swift

PHP

Python

HTTP

Objective-C

Ruby

OCaml

Dart

Responses

🟢200

application/json

Bodyapplication/json

Example

{
    "code": 200,
    "data": {
        "task_id": "a1b2c3d4-e5f6-7890-abcd-ef1234567890",
        "model": "seedream",
        "task_type": "seedream-5-lite",
        "status": "pending",
        "config": {
            "service_mode": "",
            "webhook_config": {
                "endpoint": "",
                "secret": ""
            }
        },
        "input": {
            "prompt": "A golden retriever playing in a field of sunflowers at sunset",
            "aspect_ratio": "16:9",
            "output_format": "png",
            "size": "2K"
        },
        "output": null,
        "meta": {
            "created_at": "2026-03-16T10:00:00.000000000Z",
            "started_at": "0001-01-01T00:00:00Z",
            "ended_at": "0001-01-01T00:00:00Z",
            "usage": {
                "type": "llm",
                "frozen": 0,
                "consume": 280000
            },
            "is_using_private_pool": false
        },
        "detail": null,
        "logs": [],
        "error": {
            "code": 0,
            "raw_message": "",
            "message": "",
            "detail": null
        }
    },
    "message": "success"
}

Seedream 5 Lite

Overview#

Currently available models#

Pricing#

Parameters#

size#

aspect_ratio#

output_format#

image_urls#

sequential_image_generation (advanced)#

Content moderation#

Response#

Tips#