ByteDance launches Seedream 5.5 image model
ByteDance's Seed team has released Seedream 5.5, an image model built for production work that keeps image quality stable over 100 rounds of edits and can output transparent RGBA assets directly.
ByteDance's Seed team announced Seedream 5.5 on November 9. It is pitched as a model for professional visual production, where output has to be usable, on deadline and within budget.
The release has three main upgrades:
- Multi-turn editing. Targeted training keeps unedited regions identical at the pixel level and stops their colors from shifting. ByteDance says this reduces the detail loss and degradation that build up when each output becomes the next input. In a demo, the team made 100 successive edits to an image of one person, changing clothing, accessories and tabletop objects. The model still made precise edits to small items such as rings and eyeglass frames. Other demos showed floral designs and an interior where moved objects kept their perspective, occlusion and cast shadows correct.
- Native RGBA output. The model generates images with an alpha channel, supporting full and partial transparency. That means generated elements can go straight into design workflows without a separate background-removal step. Examples include a snowy owl with fine feather and claw edges, and stylized text drawn from a reference image.
- Realism and text. ByteDance says lighting, materials and skin texture look more natural, with less excess gloss and overexposure. Complex characters and dense small text also render more accurately.
ByteDance says Seedream 5.5 improves substantially on the previous version. It also claims "leading results" in text structure and text-to-image realism compared with other major models. These are ByteDance's own evaluations and have not been independently verified. The material provided did not include pricing, API availability or full benchmark tables.