Etsy-style listing gallery: 10 images per product, cost by image model

A ten-image gallery for one product costs $0.07375 on gpt-image-2.5 low at 1024 and $0.4375 on Seedream 5 Lite; a 25-product shop is $10.9375 on Seedream 5 Lite. The number depends far more on the model row than on how many angles you ask for.

Use the table to pick a lane per image type: hero, in-context, detail, flat lay. Hero shots can use a higher row while the filler angles use a cheap one.

Ten images per product

Keep the product identical across the set

Generate the hero once, then pass it back as a reference for every other angle. Seedream 5 Lite accepts up to 10 references and n up to 4, so one call can return four variants.

import os, requests

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": "Same ceramic planter, three-quarter angle on a walnut shelf",
        "n": 4,
        "input_references": [
            {"type": "image_url", "image_url": {"url": "https://example.com/hero.png"}}
        ],
    },
    timeout=60,
)
print(r.status_code)
body = r.json()
if r.status_code == 200:
    for item in body["data"]:
        print(item["url"])
else:
    print(body)

Disclosure and file rules

Marketplace rules on sizes and AI disclosure change; Sume's own notes are in Etsy designed-by-AI disclosure if you want the record-keeping side. Check the marketplace page before upload.

A suggested split

Not every slot needs the same row.

• Hero (1 image): $0.0659 on gpt-image-2.5 high, or $0.10 on Nano Banana 2.1.
• Angles and context (6 images): $0.2625 on Seedream 5 Lite.
• Detail and flat lay (3 images): $0.0221 on gpt-image-2.5 low, before prompt tokens.
• That mix is $0.3505 per product.

Cost of the sample call

The n: 4 request above returns four images, so it costs four times the Seedream 5 Lite price: 4 x $0.04375 = $0.175. The gpt-image-2.5 rows are token-priced, so a prompt and any input reference add to the table figures; a 140-character prompt adds about $0.00025 per image.