Seedream 5.5: AI画像生成

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.

インタラクティブなモデルコントロール

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.

📝

概要

このモデルについて

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.

💰

料金と価値

コスト分析

プロバイダー	費用	備考
muapiapp	$0.02/画像 (1K, 1.5K), $0.035/画像 (2K)	Pay-per-generation pricing, サブスクリプション不要.
Fal.ai	利用不可	No dedicated Seedream 5.5 endpoint confirmed at this time.
Replicate	利用不可	No dedicated Seedream 5.5 endpoint confirmed at this time.

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

Pay-per-generation pricing, サブスクリプション不要.

Fal.ai利用不可

No dedicated Seedream 5.5 endpoint confirmed at this time.

Replicate利用不可

No dedicated Seedream 5.5 endpoint confirmed at this time.

** 競合サービスの料金は類似のモデル構成および利用ティアに基づいて算出された推定値です。

⚙️

技術詳細

設定スキーマ

パラメータ	型	説明	デフォルト
プロンプト	string	Text prompt describing the image 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`
アスペクト比	Enum（8個の選択肢）	生成メディアのアスペクト比（例：16:9、9:16、1:1など）。	`1:1`
解像度	Enum（3個の選択肢）	Output resolution tier: 1K, 1.5K or 2K.	`1K`
出力形式	Enum（2個の選択肢）	Format of the output image.	`png`
Background	Enum（3個の選択肢）	auto (default), transparent (alpha channel, forces png) or opaque.	`auto`

プロンプトstring

Text prompt describing the image to generate

デフォルト値

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

アスペクト比Enum（8個の選択肢）

生成メディアのアスペクト比（例：16:9、9:16、1:1など）。

デフォルト値1:1

解像度Enum（3個の選択肢）

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

デフォルト値1K

出力形式Enum（2個の選択肢）

Format of the output image.

デフォルト値png

BackgroundEnum（3個の選択肢）

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

デフォルト値auto

📖

実装ガイド

開発者ドキュメント

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"}'

❓

よくある質問

FAQ

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.