Varosity

Seedream 5.0 Flash API

Seedream 5.0 Flash, the fast version of ByteDance's newest image model, via WaveSpeed — 2K images and edits from a reference image. 3¢ an image on Varosity Credits.

$0.03/img on Varosity credits.

Use Seedream 5.0 Flash with your agent Get an API key

no WaveSpeed account needed · provider's list price; credits round each call up to the cent · failed renders never billed

Best for

  • fast, cheaper Seedream 5.0
  • 2K output
  • edits from a reference image

Trade-offs

  • less detail than Seedream 5.0 Pro on busy scenes

How to get the best result

Seedream 5.0 Flash: ByteDance's newest image model in its fast version, at 3¢ for a 2K image or an edit that keeps a reference image's subject. Pick instead: seedream-5.0 (Pro, 5¢) for denser detail; nano-banana-2.1 (4¢) for in-image text and design layouts; flux-1-schnell for 1¢ drafts.

Prompting

  • Describe the subject, the scene, the style, the lighting and the composition in plain sentences.
  • For an edit, pass referenceImageUrl and describe only the change.

Settings on Varosity

  • Always 2K; 3¢ an image, the same as an edit with referenceImageUrl.
  • aspectRatio 1:1, 16:9, 9:16, 4:5 or 21:9; an edit follows the reference image's shape.

Avoid

  • Choosing it over Pro for very busy scenes where fine detail matters.

Example prompt

A glass of iced matcha on a sunlit marble counter, condensation beads, soft morning shadows, editorial product photo.

From wavespeed.ai, wavespeed.ai, checked against what Varosity sends.

Call it from your code

One Varosity key works for every model.

curl -X POST https://varosity.ai/api/v1/images \
  -H "Authorization: Bearer $VAROSITY_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "prompt": "studio product shot of a matte black water bottle, soft rim light",
    "modelId": "seedream-5.0-flash",
    "aspectRatio": "1:1"
  }'

Or ask your agent

Connect Claude, Cursor, or any MCP client to https://varosity.ai/api/mcp with your key, then say:

"Use Varosity with seedream-5.0-flash to generate an image of …"
Agent setup guide

Alternatives to Seedream 5.0 Flash