Seedream 5 Lite product photo background swap: what Sume offers

Can Seedream 5 Lite swap the background behind a product?

Yes: Seedream 5.0 Lite is an editing model, so you pass the product photo as a reference and describe the new scene in the prompt. On Sume it is the catalog id bytedance-seed/seedream-5-lite, called through POST /v1/images with input_references.

The model's own page describes it as a tool for "fast, intelligent and high quality image editing suitable for creative advertising and real-world usecases", with product mockups and marketing assets named as uses. That is a vendor description of the endpoint, not a promise that a specific cutout will be clean, so check every edge on your own SKUs before you publish a batch.

What does the vendor page say about limits and price?

The page lists up to 10 reference images, up to 6 generations per call, and output sizes from 2560x1440 up to 3072x3072. It prices an image at $0.035. Sume does not mirror those numbers one for one, so the table below separates what the vendor page says from what Sume's catalog exposes.

How do I call it for a background swap?

Use a public HTTPS URL for the product photo, because Sume rejects localhost, private-network and non-HTTPS reference URLs. Set aspect_ratio to auto on edits so the result keeps the reference's shape; the docs note that omitting the field is not the same as auto.

A normal request returns 200 with hosted image URLs. If the generation outlives the 30-second blocking budget, or you send mode: "async", you get a 202 job envelope and read the result from the job endpoints instead, so check the status code before parsing the body.

import asyncio, os
import requests

async def main():
    r = requests.post(
        "https://api.sume.com/v1/images",
        headers={"Authorization": f"Bearer {os.environ['SUME_API_KEY']}"},
        json={
            "model": "bytedance-seed/seedream-5-lite",
            "prompt": "Keep the product unchanged; place it on a pale oak table by a window",
            "aspect_ratio": "auto",
            "input_references": [{"type": "image_url", "image_url": {"url": "https://example.com/product.jpg"}}],
        },
        timeout=60,
    )
    print(r.status_code)
    body = r.json()
    if r.status_code == 200:
        print(body["data"][0]["url"])
    else:
        print(body)

asyncio.run(main())

When should I pick a different model?

If a marketplace needs a fixed ratio such as 4:5 portrait, Seedream 5 Lite lists it, so no padding step is needed. If your priority is a long run of references or text overlays, compare it with the older catalog row in Seedream 4.5 edit: product replacement and text overlay.

Because billing is per completed image, you can try a swap on a handful of products first. Failed or cancelled generations are not billed, and the cost is cost_usd times n from the endpoint record.