LTX-2.3 makes 9:16 clips up to 20 s; what Sume offers instead

The fal LTX-2.3 page lists clips up to 20 seconds, portrait 9:16 output, resolutions of 1080p, 1440p and 2160p, 24 or 48 frames per second, and native audio (read 2026-10-04). If you want a vertical clip for Reels or Shorts and you searched for LTX, the question is whether you can call it on Sume.

You cannot. Sume's GET /v1/videos/models catalog lists the models the Video Router serves, and LTX is not among them. The video generation docs describe that endpoint, and the catalog in the repository carries no LTX row. A request with an LTX model id fails as an unknown model, so check the live list before wiring it into a script.

Nearest vertical options

Wan 3.0 and Seedance 2.5 both clear LTX's 20 seconds. If you want 4K, gemini-omni-flash-1.1 is the only row above that lists it, but its clips stop at 10 seconds.

List the rows yourself

import os
import requests

resp = requests.get(
    "https://api.sume.com/v1/videos/models",
    headers={"Authorization": f"Bearer {os.environ['SUME_API_KEY']}"},
)
for m in resp.json()["data"]:
    if "9:16" in m["supported_aspect_ratios"]:
        print(m["id"], max(m["supported_durations"]))

The script prints each model that lists 9:16 and its longest whole-second duration, which is the number to compare against LTX's 20.