Seedream 5.5
ByteDance's newest image generation and editing model. Seedream 5.5 generates photorealistic images at 1K, 1.5K or 2K, edits or composes from up to 10 input images, keeps edits precise over many rounds, and can return a PNG with a real transparent background. It covers nine aspect ratios from ultrawide 21:9 to vertical 9:16, including an Auto mode that follows the first input image.
20% less than the priciest provider (2 compared). Same model, same output.
As of , Seedream 5.5 costs from $0.016 per image on Scenetra, billed at provider cost with no markup. Each run is priced across 3 providers and runs on the cheapest one that supports your settings.
Optional images to edit or compose from (up to 10). Leave empty for pure text-to-image. Each input image adds a small fee.
Aspect Ratio
Aspect ratio of the output image. 'auto' follows the first input image where supported.
Resolution
Output resolution tier. 1K and 1.5K cost the same; 2K costs more.
Output Format
Image file format. A transparent background needs png.
Background
'auto' lets the model decide from your prompt. 'transparent' returns a PNG with an alpha channel (cut-outs, stickers, product shots).
20% less than the priciest provider (2 compared). Same model, same output.
Your result renders here.
Use Seedream 5.5 via the API
One REST call per generation, routed to the cheapest provider and billed in credits at provider cost. Endpoints, request fields, code examples and pricing are in the full API reference.
What makes Seedream 5.5 different
ByteDance's newest image model
Seedream 5.5 is the latest model in the Seedream line, released in November 2026. It generates photorealistic images from a prompt and edits existing ones, and it sits on the same Scenetra board as Seedream 5 Pro, Seedream 5 Lite and Seedream 4.5, so you can run the same prompt through each and compare the results side by side.
Real transparent backgrounds
Set Background to Transparent and Seedream 5.5 returns a PNG with an alpha channel, for both new images and edits. That covers cut-outs, stickers, logos and product shots without a separate background-removal step. Transparency needs the PNG output format, which is the default.
Edit and compose with up to 10 input images
Attach up to 10 images and describe the change: restyle a shot, merge subjects from several sources, or alter one detail and keep the rest. Edits stay precise over many rounds, so you can keep refining the same image. Inputs can be uploads or the outputs of other nodes on your board.
1.5K for the price of 1K
1K and 1.5K cost the same, $0.016 per image, so the default is 1.5K. 2K costs $0.028. On an edit, each input image adds $0.0064. Every run is billed at provider cost and goes to the cheapest provider that supports your settings.
Parameters
| Parameter | Type | Description | Default |
|---|---|---|---|
| Prompt* | text | Describe the image to generate, or the edit to apply to the input images. | — |
| Input Images | image upload | Optional images to edit or compose from (up to 10). Leave empty for pure text-to-image. Each input image adds a small fee. | — |
| Aspect Ratio | select | Aspect ratio of the output image. Auto follows the first input image where supported.auto · 21:9 · 16:9 · 3:2 · 4:3 · 1:1 · 3:4 · 2:3 · 9:16 | 1:1 |
| Resolution | select | Output resolution tier. 1K and 1.5K cost the same; 2K costs more.1K · 1.5K · 2K | 1.5K |
| Output Format | select | Image file format. A transparent background needs PNG.png · jpeg | png |
| Background | select | Auto lets the model decide from your prompt. Transparent returns a PNG with an alpha channel.auto · transparent · opaque | auto |
Pricing
From $0.016 per image
Pay per generation — only pay for what you use.
1K
$0.016
per image
1.5K
$0.016
per image
2K
$0.028
per image
Each input image (edits)
+$0.0064
per image
Use cases
E-commerce
- Product cut-outs on a transparent background
- Products recomposed on new scenes
- Consistent catalog imagery
- Multi-image lifestyle composites
Marketing & ads
- Hero visuals at 2K
- Campaign variants from one master prompt
- Ultrawide 21:9 banner art
- Transparent assets for layouts
Social content
- Vertical 9:16 visuals
- Stickers and overlays with alpha
- Thumbnails and covers
- Series with a consistent look
Design & concept art
- Photorealistic concept frames
- Iterative edits on one image
- Style transfer from input images
- Client option rounds side by side
Frequently asked questions
What is Seedream 5.5?+
Seedream 5.5 is ByteDance's newest image generation and editing model. It creates images from text prompts, edits or composes from up to 10 input images, outputs 1K, 1.5K or 2K, and can return a PNG with a transparent background. On Scenetra it runs in the app and on a board next to the other Seedream models.
How much does Seedream 5.5 cost?+
On Scenetra, Seedream 5.5 costs $0.016 per image at 1K or 1.5K and $0.028 per image at 2K. On an edit, each input image adds $0.0064. You pay per generation from your credit balance, billed at provider cost, and no subscription gates the model.
Can Seedream 5.5 make images with a transparent background?+
Yes. Set background to transparent and keep the output format on PNG. The result has a real alpha channel, on new images and on edits.
What is the difference between Seedream 5.5 and Seedream 5 Pro?+
Seedream 5.5 is the newer model. It adds transparent backgrounds, PNG output and a 1.5K tier that costs the same as 1K, and it costs less per image ($0.016 to $0.028 against $0.035 to $0.07). Unlike Seedream 5 Pro, it bills every input image on an edit. Both sit on the same board, so you can compare them on your own prompt.
Can Seedream 5.5 edit existing images?+
Yes. Attach up to 10 input images and describe the edit in the prompt. Inputs can be uploads or outputs from other nodes on your Scenetra board. Each input image adds $0.0064 to the run.
What resolutions and aspect ratios does Seedream 5.5 support?+
Three resolution tiers (1K, 1.5K and 2K) and nine aspect ratios: auto, 21:9, 16:9, 3:2, 4:3, 1:1, 3:4, 2:3 and 9:16. Auto follows the first input image where supported.
Is Seedream 5.5 free to try?+
Seedream 5.5 is a paid model. On Scenetra you pay per image, from $0.016, with no monthly plan required.
Related models
Seedream 5 Pro
ByteDance's most advanced image generation and editing model. Seedream 5 Pro delivers high-fidelity output at 1K (about 2MP) or 2K (about 4MP), supports up to 10 reference images for editing and composition, and covers nine aspect ratios from ultrawide 21:9 to vertical 9:16 — including an Auto mode that infers framing from your prompt.
View model →Seedream 5 Lite
ByteDance's value tier of the Seedream 5 family: image generation with built-in reasoning, example-based editing, and deep domain knowledge. Seedream 5 Lite outputs 2K, 3K, or even 4K images — all at the same flat $0.0275 per image — and accepts up to 10 reference images for edits and composition.
View model →GPT Image 2.6 Flare
OpenAI's fast image model, now with animated GIF and SVG vector output. GPT Image 2.6 Flare generates and edits images at 1K, 2K, or 4K with five quality levels up to Max, native transparent backgrounds, up to 16 reference images, and up to 4 images per run, with a planning setting for dense text and complex layouts.
View model →Nano Banana 2
Generate high-quality images at up to 4K resolution using Google's Gemini 3.1 Flash model. Nano Banana 2 is optimized for speed, supports text-to-image and image editing with reference images, and offers flexible aspect ratios.
View model →Start creating with Seedream 5.5
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