Seedream 5.5 - AI Model Guide

Seedream 5.5 is an AI image generation and editing model created by ByteDance, the company behind TikTok. It is the successor to Seedream 5.0 Pro and is available on the CRAISEE platform via BytePlus ModelArk. It handles both text-to-image creation and reference-based editing within a single unified model.

Seedream 5.5 supports three output resolutions: 1K (approximately 1 megapixel), 1.5K (approximately 2.4 megapixels), and 2K (approximately 4 megapixels). The 2K option delivers the highest quality but consumes more credits. Users can choose the resolution that best balances quality against cost for their use case.

Seedream 5.5 supports multi-reference composition with up to 10 reference images in a single request. These references can guide the generation style, combine visual elements from multiple sources, or include saved CRAISEE Person references for consistent character or subject representation across images.

Yes. Seedream 5.5 supports true RGBA alpha channel output by setting the background parameter to 'transparent'. Transparent background images are always delivered as PNG files, making them ideal for product photography, UI assets, stickers, and any workflow requiring compositing or layering.

Yes. Seedream 5.5 is specifically engineered for editing consistency, meaning only the targeted elements are modified while non-edited areas remain stable and untouched. This stability is maintained across continuous multi-turn editing sessions, so users can make sequential changes without degrading previously unedited regions.

Seedream 5.5 offers nine aspect ratio presets including 1:1 (square), 16:9 (landscape), 9:16 (portrait), and 21:9 (ultrawide), among others. It can also automatically match the aspect ratio of a provided reference image, giving users flexible control over composition without manual cropping.

Seedream 5.5 improves upon Seedream 5.0 Pro in three key areas: visual realism, aesthetic performance, and editing consistency. It also introduces multi-reference composition with up to 10 images, transparent background output, and continuous multi-turn editing stability — features not available or less capable in the previous version.

Seedream 5.5 is available on the CRAISEE platform under the model ID 'bytedance/seedream-5.5'. It is provided by BytePlus ModelArk, ByteDance's cloud AI service. Users access it through CRAISEE's API or interface using a credit-based system, with credit cost varying by chosen output resolution.