Reported News
ByteDance Seed introduces Seedream 5.5, its next-generation image creation model
ByteDance Seed introduced Seedream 5.5 on Nov 9, 2026, calling it "our next-generation image creation model." The official post says it supports 100 rounds of editing and that the severe text corruption rate fell to 0.4% in the company's own evaluations.
- Changes reported
- 6
- listed below, each from a source we read
- We tested
- Not tested yet
- reported from sources; we did not run it ourselves
- Gaps we flag
- 4
- things we could not verify
- Sources
- 2
- 1 primary, linked below
What changed
| # | What the source says | Status |
|---|---|---|
| 01 | ByteDance Seed introduced Seedream 5.5 on Nov 9, 2026, calling it its next-generation image creation model. The official post is dated 2026-11-09. | Reported |
| 02 | The post says Seedream 5.5 supports continued work on the same image across 100 rounds of editing, preserving unedited regions at the pixel level and eliminating color shifts in those areas. | Reported |
| 03 | Seedream 5.5 introduces native RGBA generation, directly producing images with an alpha channel that supports full and partial transparency, so assets can enter design workflows without separate background removal. | Reported |
| 04 | In ByteDance Seed's own evaluations covering Chinese and English, including densely arranged small text, the severe text corruption rate fell to 0.4% and the minor text corruption rate fell to 1.7%. | Reported |
| 05 | Compared with Seedream 5.0 Pro, the post says quality scores and usability rates improved across all six use cases it tested. In film and television and in office productivity, usability rates were more than twice those of the previous version. | Reported |
| 06 | The post says Seedream 5.5 leads GPT Image 2.5 Sunburst and Nano Banana 2.1 in text structure, with a substantial advantage in text-to-image realism, and that a Pro version of the series will follow. The Chinese official post says the model is rolling out on Jimeng, Doubao, Doubao Work, and Volcano Ark. | Reported |
reported by the sourcemeasured or run by usnot verified
Primary source: ByteDance Seed blog: More Realistic Images, More Stable Editing Across 100 Rounds | Introducing Seedream 5.5. We are the fast, independent index; the vendor’s own page is the source of record for this release.
In the source’s words
“Today, we are introducing Seedream 5.5, our next-generation image creation model.”
“This supports continued work on the same image across 100 rounds of editing.”
What we have not verified
- We did not run Seedream 5.5; every quality, usability, GSB and text-corruption figure is from ByteDance Seed's own MagicArena evaluations, not an independent benchmark.
- The English official post does not state pricing, a public API id, or availability outside the Chinese official post's product list.
- We did not independently confirm that the model is live on Jimeng, Doubao, Doubao Work, or Volcano Ark.
- "Leading" results versus GPT Image 2.5 Sunburst and Nano Banana 2.1 are the vendor's GSB preference scores, not a third-party leaderboard.
This brief is Reported: written from the sources below, not from running the release ourselves.
Sources
- ByteDance Seed blog: More Realistic Images, More Stable Editing Across 100 Rounds | Introducing Seedream 5.5primary source · fetched 2026-11-10
- ByteDance Seed blog: Introducing Seedream 5.5 (Chinese official post)source · fetched 2026-11-10
Related
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