# Seedream 5.5 How to use Seedream 5.5 in Sloosh: reference images, transparent background, multi-round edits, credit cost, Studio, Spacelab and MCP. Last updated: 2026-11-11 **Key facts** - Seedream 5.5 is ByteDance's Seedream image model after Seedream 5.0, on Sloosh through early access. - Seedream 5.5 makes 1K or 2K images in Sloosh and takes up to 10 reference images. - Seedream 5.5 can return a transparent background as a PNG with alpha. - Seedream 5.5 costs 0.525 credits per image, plus 0.120 credits for each reference image. Web page: https://sloosh.ai/docs/seedream-5-5 Seedream 5.5 is ByteDance's Seedream image model after Seedream 5.0. It makes 1K or 2K images from a prompt or up to 10 reference images, writes better text in images, can return a transparent PNG, and keeps an image steady over many rounds of edits. Sloosh has Seedream 5.5 through ByteDance's early access program, so it is not on every platform yet. ## When to use it - Posters, labels and ads where the text has to read right. - Cut-outs, stickers and logos that need a transparent background (PNG with alpha). - Multi-reference image editing: a product, a model and a setting in one run. - Edits over several rounds, one change at a time. ## How to prompt it - Put exact text in quotes and say where it goes. - Name references by number and job: "Image 1 for the product, Image 2 for the setting". Then say what must stay the same. - For a cut-out, describe only the subject and set Background to Transparent. - In a multi-round edit, use the last result as the reference and ask for one change per round. ## Example **Prompt** ```text A bold poster for a summer farmers market. Big headline at the top in thick white letters: "FRESH ON SATURDAY". Below it, a smaller line: "Main Square, 8 am to 1 pm". A crate of ripe peaches and tomatoes fills the lower half, shot from slightly above in warm morning light. Deep green background, vertical 3:4 frame. ``` ## Transparent background Background has three options: Auto (the model decides), Opaque (a solid background) and Transparent (a cut-out with nothing behind it). Transparent returns a PNG with alpha, so it sits on a slide, a story or a design with no box around it. ## Credit cost Seedream 5.5 costs 0.525 credits per image, plus 0.120 credits for each reference image, at 1K or 2K. One image with 3 reference images costs 0.525 + 3 x 0.120 = 0.885 credits. The Generate button shows the cost first. ## Settings in Sloosh - Resolution: 1K or 2K. 2K is the default. - Aspect ratio: 1:1, 4:3, 3:4, 16:9, 9:16, 3:2, 2:3, 21:9, 9:21, 4:5, 5:4. - Background: Auto, Opaque or Transparent. - References: up to 10 images. - Seed: available, to repeat a result. - Prompt: up to 5,000 characters. ## Where you can use it - [Studio](https://sloosh.ai/studio/image?image-model=seedream-5.5): open Image and pick Seedream 5.5 in the model chip. - [Spacelab](https://sloosh.ai/docs/spacelab.md): pick it in an image node. - Claude and ChatGPT: connect [Sloosh MCP](https://sloosh.ai/docs/mcp.md) and ask for Seedream 5.5. ## Seedream 5.5 vs Seedream 5 Pro Both make 1K or 2K images from up to 10 references and prompts up to 5,000 characters. Seedream 5.5 adds a Transparent background and a 9:21 ratio. [Seedream 5 Pro](https://sloosh.ai/docs/seedream-5-pro.md) keeps its box-based region edits. Model pages: [Seedream 5.5](https://sloosh.ai/models/seedream-5.5), [Seedream 5 Pro](https://sloosh.ai/models/seedream-5-0-pro), [all models](https://sloosh.ai/models). ## Frequently asked questions ### What is Seedream 5.5? Seedream 5.5 is ByteDance's Seedream image model after Seedream 5.0. In Sloosh it makes 1K or 2K images with better text, up to 10 references and an optional transparent background. ### How many reference images does Seedream 5.5 take? Seedream 5.5 takes up to 10 reference images per generation in Sloosh. Name them by number in the prompt. ### Can Seedream 5.5 make a transparent background? Yes. Set Background to Transparent and Seedream 5.5 returns a PNG with alpha. ### How well does Seedream 5.5 write text in images? Text is one of the things Seedream 5.5 improves on. Put the exact words in quotes and say where they go. ### Can I edit the same image over several rounds with Seedream 5.5? Yes. Seedream 5.5 is built for steady multi-round edits, but check each result; changing one thing per round works best. ### What does Seedream 5.5 cost? 0.525 credits per image, plus 0.120 credits for each reference image. One image with 3 reference images costs 0.525 + 3 x 0.120 = 0.885 credits. ### Where can I use Seedream 5.5? In Sloosh Studio, in Spacelab, and from Claude or ChatGPT through [Sloosh MCP](https://sloosh.ai/docs/mcp.md). ### What resolutions does Seedream 5.5 make? Seedream 5.5 makes 1K or 2K images in Sloosh, with 2K as the default. ### Is Seedream 5.5 available everywhere yet? No. Sloosh has Seedream 5.5 through ByteDance's early access program, so it is not on every platform yet. Last checked 11 Nov 2026.