ByteDance releases Seedream 5.5 image model with 100-round editing and native transparent output
ByteDance Seed says severe text corruption fell to 0.4% in its own tests; the comparisons with GPT Image and Nano Banana are the company's evaluations, not independent ones.
Why it matters
Seedream 5.5 targets the weak point of image models in production work: quality decaying over repeated edits. ByteDance says unedited regions stay pixel-identical across 100 rounds, and the model now outputs images with an alpha channel, removing a cut-out step for designers. In its tests across six business use cases, usability in film and office work more than doubled against Seedream 5.0 Pro. It is rolling out in Jimeng, Doubao and Volcano Engine's Ark. Watch for independent leaderboard results, since early testers on X already question how much it borrows from GPT Image.
Key facts
- Up to 100 rounds of editing on one image
- Native RGBA output with transparency
- Severe text corruption 0.4%, minor 1.7% (company tests)
- Film and office usability more than double Seedream 5.0 Pro
- Rolling out in Jimeng, Doubao and Volcano Engine Ark