Seedream 5.5 adds long editing runs and native transparent assets
ByteDance released Seedream 5.5 with native RGBA output, claimed pixel-level preservation of unedited regions and support for editing across 100 rounds. The model is exposed through BytePlus Playground, while ByteDance says a separate Pro version will follow.
Why it matters: Native transparency and lower drift across iterative edits can remove background-removal and rework steps from production design pipelines. The relevant test is not a single showcase image but whether exact assets survive repeated edits under real prompts.