Seedream 5.5

Seedream 5.5 is ByteDance Seed's next-generation image model, announced on 9 November 2026. It is aimed at teams that already use text-to-image inside real production — where a result has to stay usable across quality bars, deadlines and budget, not just look good as a one-off sample.

The official write-up highlights three upgrades:

• More stable multi-turn editing — unedited regions stay intact at the pixel level, with less color drift and less detail loss across successive tweaks, supporting continued work on the same image for up to about 100 rounds;
• Native RGBA assets — images can ship with a full or partial alpha channel and cleaner edges, so generated elements drop into a layout without a separate cutout pass;
• More realistic materials and clearer text — lighting, surfaces and skin are meant to look less glossy or blown-out, and complex or densely set small type should hold up better.

Project page: https://seed.bytedance.com/en/seedream5_5 . The matching tech blog went out the same day in English and Chinese. You can try it in Dreamina (https://dreamina.capcut.com/seedream/seedream-5-5 ), CapCut, Doubao, Doubao Workplace, and Volcano Engine Ark / BytePlus as Doubao-Seedream-5.5. A Pro variant of the 5.5 series is promised later.

Why it matters

Once image models enter ecommerce, posters, film and brand work, the failure mode is rarely "the first frame is ugly." It is the tenth edit quietly shifting a color you did not touch, small type falling apart, or a generated object that still needs to be masked before design tools will accept it. Seedream 5.5 treats multi-turn stability and native transparency as first-class features, and ByteDance reports gains over the previous version plus leading scores versus other major models on text structure and text-to-image realism. Chinese coverage also said the API keeps an input-image plus output-image billing split (text tokens free) and put a 2K square edit at roughly ¥0.28 — less than half of Seedream 5.0 Pro — subject to the live Ark price list.

Limits

Day-one distribution is mostly inside ByteDance surfaces (Dreamina, Doubao, CapCut, Volcano Engine Ark / BytePlus); third-party access is not fully spelled out. Benchmarks come from the official blog. The "~100 rounds, pixel-level freeze of untouched regions" claim still needs a check on your own brand colors, fine type and skin tones. The Pro model is not out yet.

1. Read https://seed.bytedance.com/en/seedream5_5 or the English blog at https://seed.bytedance.com/en/blog/more-realistic-images-more-stable-editing-across-100-rounds-introducing-seedream-5-5 ;
2. In Dreamina open the Seedream 5.5 page, or pick Seedream 5.5 / Doubao-Seedream-5.5 in Doubao, Doubao Workplace or Volcano Engine Ark; CapCut and BytePlus are part of the same rollout;
3. For stickers, key visuals or product cutouts, generate a native RGBA asset instead of a solid plate you then have to mask;
4. When you iterate locally, watch whether untouched regions and small text stay put before you trust it in a production pipeline; use the live Ark price card for API cost.