AI quote card backgrounds on Seedream 4: auto ratio, $0.0325 each

For AI quote card backgrounds, call bytedance-seed/seedream-4 with a ratio like 1:1, 3:4 or 9:16: Sume lists it at $0.026 per image and bills $0.0325 (list times 1.25), so ten backgrounds cost $0.325. Its ratio list also includes auto, which the 4.5 and 5 Lite rows do not list.

A quote card is text on a soft image, so the background needs calm space where words go. Prices and ratios are from Sume's Image API page and the catalog source, read on 2026-10-05. Add the quote in your design tool, since a typo in a generated quote is hard to catch after the fact.

How does Seedream 4 differ from 4.5?

Seedream 4 is the cheaper row. Check the catalog before you rely on any parameter, since a value outside the row's descriptor returns 400 unsupported_parameter.

How do I request a background?

Ask for soft shapes and a calm area so text stays legible.

import os, requests

body = {
    "model": "bytedance-seed/seedream-4",
    "prompt": "Soft abstract background of pale peach and lilac gradients with faint paper texture, calm, no objects, no text",
    "aspect_ratio": "4:5",
    "n": 4
}
r = requests.post(
    "https://api.sume.com/v1/images",
    headers={"Authorization": f"Bearer {os.environ['SUME_API_KEY']}"},
    json=body,
    timeout=60,
)
if r.status_code == 200:
    out = r.json()
    for img in out["data"]:
        print(img["url"])
    print("billed USD:", out["usage"]["cost"])
elif r.status_code == 202:
    print("still running, poll:", r.json()["data"]["status_url"])
else:
    print(r.status_code, r.text)

What should I check?

• Put your quote on the card and check contrast at phone size.
• Choose auto only if you accept the model's chosen shape.
• Use 9:16 for a story and 4:5 for a feed post.
• Read usage.cost to confirm 4 x $0.0325 per call.