Seedream 5.5 on VdoBloom: Credits, Sizes, Limits and Prompts

Seedream 5.5 is now on VdoBloom for both making images and editing photos. Generating costs 2 credits at 1K and 3 credits at 2K. Editing costs 4 credits at 1K and 5 at 2K, with up to 10 photos per edit. It has 8 aspect ratios and takes prompts up to 5,000 characters. In our tests on 10 November 2026 an image took about 15 to 35 seconds. Open the AI image generator or the AI photo editor and pick Seedream 5.5 in the model list.

Updated 10 November 2026.

Quick facts

Generate: 2 credits at 1K, 3 credits at 2K.
Edit: 4 credits at 1K, 5 credits at 2K.
Aspect ratios: 1:1, 4:3, 3:4, 16:9, 9:16, 2:3, 3:2 and 21:9.
Prompt length: up to 5,000 characters.
Photos per edit: up to 10.
Speed in our tests: about 15 to 35 seconds per image.
Failed runs: credits are returned automatically.

What we tested, and what we did not

We ran Seedream 5.5 ourselves before adding it, and this page only states what those runs showed.

Text in the image: a prompt for a bookshop window with a sign reading "OPEN LATE" came back with the sign spelled correctly, at 1K in 9:16.
Real sizes: a 1K 9:16 image came back at 800 x 1424 pixels; a 2K 16:9 image at 2816 x 1584; a 2K 1:1 edit at 2048 x 2048.
Editing: “keep the subject exactly the same, change the background to a sunny beach” kept the subject, pose and outfit and replaced the background.

We have not run a large side-by-side quality comparison against other models yet, so this page does not rank it. Try it on your own prompt: at 2 credits a try, that costs less than reading a review.

Where it sits in the Seedream family

Model on VdoBloom	Generate	Edit	Sizes
Seedream 5 Flash	2 credits	4 credits	1K or 2K, one price
Seedream 5.5	2 credits at 1K, 3 at 2K	4 credits at 1K, 5 at 2K	1K or 2K
Seedream 4.5	7 credits	7 credits	2K or 4K

At 1K, Seedream 5.5 costs the same as Seedream 5 Flash. At 2K it is one credit more. If you need 4K output, Seedream 4.5 is the Seedream model on VdoBloom that offers it.

How to use it

Open the AI image generator for a new image, or the AI photo editor to change your own photo.
Open the model list, choose the Seedream family, then Seedream 5.5.
Write the prompt. Put words that should appear in the picture inside quotes.
Pick an aspect ratio and 1K or 2K. The credit cost shows on the button before you start.
Generate. A failed run returns the credits on its own.

Prompts to try

Shop sign. “A cozy bookshop window at dusk, a hand-painted sign that reads "OPEN LATE", warm light, photo.”
Portrait for a story, 9:16. “Portrait of a woman in a yellow raincoat on a rainy street at night, neon reflections on wet pavement, shallow depth of field, 35mm photo.”
Product on white, 1:1. “A pair of white running shoes on a plain white background, soft shadow under the shoes, studio product photo, nothing else in the frame.”
Wide scene, 21:9. “A desert road at sunrise running to the horizon, one red car far away, long shadows, cinematic wide shot.”
Background swap (edit). Upload a photo, then: “Keep the person exactly the same. Change the background to a sunny beach.”
Two photos into one (edit). Upload a person and a room, then: “Place the person from image 1 sitting on the sofa in image 2. Keep the face and clothes from image 1. Match the light of the room.”

Getting better results

Draft at 1K. Find the picture at 2 credits a try, then make the final at 2K for 3.
Describe the picture, not a list of tags. Full sentences about subject, place, light and framing work better than keyword strings.
When editing, say what must not change. “Keep the face, hair and outfit the same” protects the subject.
Use the fewest photos that do the job. One or two clear photos are easier for the model to follow than ten.

Frequently asked questions

How many credits does Seedream 5.5 cost?

On VdoBloom, generating costs 2 credits at 1K and 3 credits at 2K. Editing costs 4 credits at 1K and 5 at 2K.

Does Seedream 5.5 make 4K images?

No. It offers 1K and 2K. For 4K, use Seedream 4.5, or upscale the result with the image upscaler.

How many photos can I use in one edit?

Up to 10.

Can I try Seedream 5.5 free?

New accounts get 10 free credits with no card, enough for five 1K images. Free downloads carry a watermark, which is removed after any credit pack or plan. See pricing for the options.

Is Seedream 5.5 better than Seedream 5 Flash?

It is the newer model, and at 1K it costs the same, so it is worth trying first. We have not published a side-by-side test yet, so run your own prompt on both and keep the one you prefer.

Start here: make an image with Seedream 5.5, or edit a photo with it.