16:10, 10:16, 3:1 and 1:3 image ratios: only Ideogram on Sume

Ideogram V3 and Ideogram 4.5 are the two Sume image models that list 16:10, 10:16, 3:1 and 1:3 in their ratio lists. Ideogram V3 bills $0.075 per image and Ideogram 4.5 bills $0.075 at medium quality; a request for one of these ratios on any other model returns 400 unsupported_parameter.

Facts are from the Sume Image API docs and the live catalog (read 2026-10-03).

Which models take which

16:10 is the shape of most laptop screens and 3:1 suits a web banner or a profile header. If you need 21:9 instead, Qwen Image and Recraft V4 list it.

Checking in code

Read the ratio list from GET /v1/images/models rather than hard-coding it; the catalog is the source of truth and can change between releases. This script prints each model id and whether the ratio text appears in its record.

import os
import requests

hdr = {"Authorization": "Bearer " + os.environ["SUME_API_KEY"]}
r = requests.get("https://api.sume.com/v1/images/models", headers=hdr, timeout=30)
r.raise_for_status()
wanted = "3:1"
for m in r.json()["data"]:
    print(m["id"], wanted in str(m))