Seedream 5.5: AI 图像生成器

Generate photorealistic images with the Seedream 5.5 API. Native transparent backgrounds, 8 aspect ratios, 1K to 2K output. Pay per generation. Seedream 5.5 is ByteDance's image model for photographic realism and aesthetics, with native transparent-background output, 8 aspect ratios and 1K, 1.5K and 2K tiers.

交互式模型控制

Seedream 5.5 is ByteDance's image model for photographic realism and aesthetics, with native transparent-background output, 8 aspect ratios and 1K, 1.5K and 2K tiers.

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概览

关于此模型

Seedream 5.5 is ByteDance's image model focused on photographic realism and visual aesthetics. The Seedream 5.5 text-to-image API renders images at 1K, 1.5K and 2K, supports 8 aspect ratios from 9:16 to 21:9, and can return native transparent-background PNGs for stickers, product cut-outs and design assets. Edit existing images with Seedream 5.5 Edit, split flat images into layers with Seedream 5.5 Layer Decomposition, or compare with the earlier Seedream 5.0 Pro.

1Marketing: Produce campaign visuals, social graphics and posters with readable in-image text.

2Transparent Assets: Generate stickers, icons, characters and product cut-outs with an alpha channel.

3Product Photography: Create photorealistic lifestyle and studio shots for catalogs.

4Creative Concepting: Explore characters, environments and styles cheaply at 1K before finalizing at 2K.

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价格与价值

成本分析

提供商	费用	备注
muapiapp	$0.02/image (1K, 1.5K), $0.035/image (2K)	按次生成计费，无需订阅。
Fal.ai	暂不可用	No dedicated Seedream 5.5 endpoint confirmed at this time.
Replicate	暂不可用	No dedicated Seedream 5.5 endpoint confirmed at this time.

muapiapp$0.02/image (1K, 1.5K), $0.035/image (2K)

按次生成计费，无需订阅。

Fal.ai暂不可用

No dedicated Seedream 5.5 endpoint confirmed at this time.

Replicate暂不可用

No dedicated Seedream 5.5 endpoint confirmed at this time.

** 竞品价格根据相似模型架构和使用层级估算。

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技术详情

配置参数

参数	类型	描述	默认值
提示词	string	描述图像的文本提示词 to generate	`A cozy street-side cafe in Lisbon at golden hour, a barista handing a cup of coffee across the counter, warm natural light, blue azulejo tiles, a chalkboard menu written in English, photorealistic, shot on 35mm`
画面比例	枚举（8 个选项）	输出图像的画面比例。	`1:1`
分辨率	枚举（3 个选项）	Output resolution tier: 1K, 1.5K or 2K.	`1K`
输出格式	枚举（2 个选项）	Format of the 输出图像.	`png`
Background	枚举（3 个选项）	auto (default), transparent (alpha channel, forces png) or opaque.	`auto`

提示词string

描述图像的文本提示词 to generate

默认值

A cozy street-side cafe in Lisbon at golden hour, a barista handing a cup of coffee across the counter, warm natural light, blue azulejo tiles, a chalkboard menu written in English, photorealistic, shot on 35mm

画面比例枚举（8 个选项）

输出图像的画面比例。

默认值1:1

分辨率枚举（3 个选项）

Output resolution tier: 1K, 1.5K or 2K.

默认值1K

输出格式枚举（2 个选项）

Format of the 输出图像.

默认值png

Background枚举（3 个选项）

auto (default), transparent (alpha channel, forces png) or opaque.

默认值auto

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实施指南

开发者文档

How to Use the Seedream 5.5 API

Write a descriptive prompt covering subject, lighting, composition and any text to render.
Pick an aspect ratio from 1:1, 4:3, 3:4, 16:9, 9:16, 2:3, 3:2 or 21:9.
Choose resolution 1K, 1.5K or 2K, an output_format of png or jpeg, and set background to transparent for cut-outs (requires png).
Submit and poll the request_id for the result.

curl -X POST https://api.muapi.ai/api/v1/seedream-5.5 \
  -H "x-api-key: $MUAPI_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"prompt":"A frosted glass serum bottle on wet travertine stone, soft morning light","aspect_ratio":"4:5","resolution":"2K"}'

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常见问题

常见问答

What is Seedream 5.5?

Seedream 5.5 is ByteDance's image generation model with improved photographic realism, aesthetics, native transparent-background output and 1K, 1.5K and 2K tiers.

How much does the Seedream 5.5 API cost?

$0.02 per image at 1K and 1.5K and $0.035 at 2K. Pay per generation with no subscription.

Which aspect ratios are supported?

Eight ratios: 1:1, 4:3, 3:4, 16:9, 9:16, 2:3, 3:2 and 21:9, set with `aspect_ratio`.

Can it output a transparent background?

Yes. Set `background` to `transparent` with `output_format` png to receive an image with an alpha channel.

Does Seedream 5.5 support a spicy mode?

The Seedream 5.5 API applies standard content-safety moderation, so explicit adult output is not guaranteed and prompts that trigger the filter are rejected and refunded. If you need a less restricted tier for mature creative work, see the Spicy models on Muapi, such as [Seedance 2.5 Spicy](/seedance-2.5-spicy) for video.

How do I get the result?

Requests are asynchronous: submit a job, then poll the returned `request_id` or pass a `webhook` URL to be notified on completion.

Is there a sandbox for testing?

Yes. Sandbox API keys return mock results instantly with no credits deducted.