# Seedream 5.5

Seedream 5.5 is ByteDance's latest image-generation model in our dataset (public preview), released Nov 9, 2026. Proprietary, API access only. ByteDance Seed's Seedream 5.5 image creation model, introduced Nov 9, 2026, with vendor-reported 100-round editing and native RGBA output. Verified against vendor sources on Nov 10, 2026.

Primary source (source of record; Agentic Weekly is the fast independent index): https://seed.bytedance.com/en/blog/more-realistic-images-more-stable-editing-across-100-rounds-introducing-seedream-5-5/

Last verified: 2026-11-10 · Evidence: Reported · Canonical: https://theagenticweekly.com/models/seedream-5-5 · JSON: https://theagenticweekly.com/api/models/seedream-5-5

## Key facts

| Fact | Value | Source | Label | Anchor |
|---|---|---|---|---|
| Vendor | ByteDance |  | editorial | https://theagenticweekly.com/models/seedream-5-5#fact-vendor |
| Released | Nov 9, 2026 | https://seed.bytedance.com/en/blog/more-realistic-images-more-stable-editing-across-100-rounds-introducing-seedream-5-5/ | vendor-reported, confirmed | https://theagenticweekly.com/models/seedream-5-5#fact-release-date |
| Input | text, image | https://seed.bytedance.com/en/blog/more-realistic-images-more-stable-editing-across-100-rounds-introducing-seedream-5-5/ | vendor-reported, confirmed | https://theagenticweekly.com/models/seedream-5-5#fact-input-modalities |
| Output | image | https://seed.bytedance.com/en/blog/more-realistic-images-more-stable-editing-across-100-rounds-introducing-seedream-5-5/ | vendor-reported, confirmed | https://theagenticweekly.com/models/seedream-5-5#fact-output-modalities |
| Licence | Proprietary | https://seed.bytedance.com/en/blog/more-realistic-images-more-stable-editing-across-100-rounds-introducing-seedream-5-5/ | vendor-reported, confirmed | https://theagenticweekly.com/models/seedream-5-5#fact-license |

## What we tested

Nothing yet. We have not run Seedream 5.5 ourselves, so every fact here is Reported from the sources below.

## Not verified, left out

- The English official post does not state pricing, a public API id, or context or output token limits.
- The Chinese official post says Seedream 5.5 is rolling out on Jimeng, Doubao, Doubao Work, and Volcano Ark, and names Doubao-Seedream-5.5 as a Volcano Ark experience-center path; we did not independently confirm those products are live.
- Quality, usability, GSB and text-corruption figures are ByteDance Seed's own MagicArena evaluations, not an independent benchmark.
- A Pro version of the Seedream 5.5 series is described as forthcoming, with no date.

## Alternatives to Seedream 5.5

Models from other vendors that share at least one of our groups, from each model's sourced facts (not tested by us).

- [GPT-Image-2.6 Flare](https://theagenticweekly.com/models/gpt-image-2-6-flare) (OpenAI): Both in: Image · $5 in / $30 out per 1M tokens · released Nov 4, 2026
- [GPT-Image-2.6 Sunburst](https://theagenticweekly.com/models/gpt-image-2-6-sunburst) (OpenAI): Both in: Image · $5 in / $30 out per 1M tokens · released Nov 4, 2026
- [MAI-Image-2.7](https://theagenticweekly.com/models/mai-image-2-7) (Microsoft): Both in: Image · released Oct 27, 2026
- [Nano Banana 2.1](https://theagenticweekly.com/models/nano-banana-2-1) (Google): Both in: Image · 1K image $0.0336; 2K image $0.0504; 4K image $0.113 (per image) · released Oct 6, 2026

## Seedream 5.5 FAQ

**When was Seedream 5.5 released?**

ByteDance released Seedream 5.5 on Nov 9, 2026; it is listed as public preview. Source: https://seed.bytedance.com/en/blog/more-realistic-images-more-stable-editing-across-100-rounds-introducing-seedream-5-5/

**Is Seedream 5.5 open weights?**

No. The weights are not published; the licence is listed as Proprietary. Source: https://seed.bytedance.com/en/blog/more-realistic-images-more-stable-editing-across-100-rounds-introducing-seedream-5-5/

**Has Agentic Weekly tested Seedream 5.5?**

Not yet. Every fact on this page is Reported: read from the linked vendor pages, not measured by us.

## Sources

- [ByteDance Seed blog: Introducing Seedream 5.5](https://seed.bytedance.com/en/blog/more-realistic-images-more-stable-editing-across-100-rounds-introducing-seedream-5-5/)
- [ByteDance Seed blog: Introducing Seedream 5.5 (Chinese)](https://seed.bytedance.com/zh/blog/more-realistic-images-more-stable-editing-across-100-rounds-introducing-seedream-5-5)
- [Agentic Weekly brief: Seedream 5.5](https://theagenticweekly.com/news/seedream-5-5-image-model)

Data licence: CC BY 4.0. Data: Agentic Weekly (https://theagenticweekly.com), CC BY 4.0.