What is Seedream 5.0 Flash?

Seedream 5.0 Flash is ByteDance's fast Seedream image model. It launched on NightCafe on 21 October 2026 as a PRO model.

Use it when you want Seedream generation, prompt-to-edit, and 2K output at a flat 2 credits per image, including up to 10 reference images. Seedream 5.5 (13 November 2026) is the newer model: 2 credits at about 1K, extra credits for each reference image, and a transparent PNG option. Use Flash when the price must stay at 2 credits for 2K or for several references. Walkthrough: Seedream 5.5 on NightCafe.

Independent Artificial Analysis image arenas have not listed Seedream 5.0 Flash yet (checked 13 November 2026). Seedream 5.5 sits about 10th on the text-to-image board (Elo about 1134) and Seedream 5.0 Pro about 19th (Elo about 1103). On NightCafe, treat Flash as the flat-price Seedream — 2 credits at 1K or 2K, with reference images included — not a replacement for GPT Image 2.5 Flare on Quality Low (~1 credit) when you want the everyday all-rounder, or Muse Image (~2 credits, unlimited on AI Creator+) when you want a 2-credit model that is unlimited on AI Creator+.

Curious how it looks next to other models? NightCafe's free AI Model Comparison now has both a text-to-image grid and an Image Editing grid.

What it's good at

• Flat 2-credit price — 1K and 2K cost the same. Extra start images do not add credits.
• 1K and 2K — Medium is about 1K (the default). High is about 2K. There is no 4K setting on Flash.
• Prompt to Edit — add a start image and describe the change. An edit is still 2 credits.
• Multi-image fusion — combine up to 10 reference images in one generation, included in the 2-credit price.
• Consistent characters — keep a subject looking the same across creations. A character counts as one reference.
• Up to 4 images per generate.

How to use it

In Studio, pick Seedream 5.0 Flash from the model picker (ByteDance). Write a prompt, optionally add start images, choose Resolution, then Generate.

Resolution defaults to Medium (about 1K). You can keep the aspect ratio of a start image, or pick from 1:1, 3:4, 4:3, 16:9, 9:16, 2:3, 3:2, and 21:9.

Write a clear brief: subject, action, setting, camera, and any exact text in quotation marks. For an edit, add the image as a Start Image and describe only the change. For fusion, give each reference a job (for example one face, one outfit, one background).

A square product photo for an online shop. A ceramic pour-over coffee dripper in matte speckled cream sits on a walnut board, with a linen cloth and a small bowl of coffee beans. Soft window light from the left. The kraft card in front reads "HOUSE BLEND". Photoreal, clean background.

Change the card text to "SINGLE ORIGIN" and keep the dripper, board, lighting, and camera position the same.

Resolution and credits

Credits are per image. Seedream 5.0 Flash is a flat 2 credits at Medium (1K) and High (2K), with or without start images.

Seedream 5.0 Flash is not an unlimited model, and it is not available on free accounts.

Seedream 5.0 Flash vs Seedream 5.0 Pro

Good to know

• Seedream 5.0 Flash is PRO only.
• Resolution defaults to Medium (1K). There is no Low or 4K setting.
• You can attach up to 10 start images without extra credit cost.
• Flash does not use a seed control — each generate is a new result.
• Newer models show a New badge in the Studio picker for a couple of weeks. Seedream 5.5 is the current new Seedream.
• For 4K Seedream output, use Seedream 4.0 or Seedream 4.5.

See also Seedream 5.5 on NightCafe, Seedream on NightCafe, and the NightCafe AI Models Guide.