ByteDance launches Seedream 5.5 with 100-round editing and transparent PNG output

What happened

Seedream 5.5 supports stable multi-turn editing across up to 100 rounds. The aim is to keep unedited regions unchanged and avoid the colour drift that can build up when an image is edited many times.

The model also generates native RGBA images with full or partial transparency, which removes the separate background-removal step.

Seed reports better lighting, materials and skin texture, and improved rendering of dense and complex text. Its own figures put severe text corruption at 0.4% and minor corruption at 1.7% in Chinese and English. These are vendor figures.

Seed also claims Seedream 5.5 leads GPT Image 2.5 Sunburst and Nano Banana 2.1 on text structure. No independent leaderboard data was available at launch.

Availability and price

Seedream 5.5 can be tried through Dola and the BytePlus Playground. A Pro version is planned, with no date given.

The official launch post lists no price. Third-party reports of API pricing vary, so any figures should be treated as unconfirmed.

Why it matters for creators

Long edit chains and transparent assets matter for creators building thumbnails, product shots and layered compositions. If edits stay stable over many rounds, an image can be refined step by step without the rest of the frame shifting. Native transparency means a product or character can go straight onto a new background.

The text-rendering claims are relevant for posters, thumbnails and social graphics, but they rest on Seed's own measurements for now.

KreatorFlow offers the Seedream 5.x model family.