Grok Imagine Video 1.5 Lite on Vercel AI Gateway vs Sume /v1/videos

Vercel's changelog dated 8 October 2026 says Grok Imagine Video 1.5 Lite is available on AI Gateway under the model id spacexai/grok-imagine-video-1.5-lite, called with the AI SDK's experimental_generateVideo. Sume does not list a Lite row, so the same text-to-video job on Sume is a POST /v1/videos with a model id from the Sume catalog, such as wan-3.0, followed by a poll and a download.

What did Vercel announce on 8 October?

The changelog entry describes text-to-video and image-to-video with native audio, clips of 1 to 15 seconds, output up to 1080p, and seven aspect ratios from widescreen to portrait. It shows a TypeScript call with resolution: '1920x1080', aspectRatio: '16:9' and duration: 10. It does not state a price, so budget from the model owner's own page instead.

OpenRouter's page for the same model shows the same 1 to 15 second range and 480p, 720p and 1080p options, and a job flow of submit, poll, then download from a content endpoint. Both pages are listed in the sources.

What is the equivalent call on Sume?

Sume video is asynchronous. You submit to /v1/videos, get a job id and a polling URL, poll until the status is completed, then read the content URL. The catalog is whatever GET /v1/videos/models returns for your key, so check it before you hard-code an id.

This Python sketch sends a ten-second text-to-video request to wan-3.0, which the Video Router table lists at 2 to 30 seconds and 480p, 720p or 1080p.

import os, time, requests

BASE = "https://api.sume.com/v1/videos"
HEADERS = {"Authorization": f"Bearer {os.environ['SUME_API_KEY']}"}

def main():
    body = {
        "model": "wan-3.0",
        "prompt": "A paper sailboat drifts on a quiet pond at sunrise.",
        "duration": 10,
        "resolution": "720p",
        "aspect_ratio": "16:9",
    }
    r = requests.post(BASE, json=body, headers=HEADERS, timeout=30)
    r.raise_for_status()
    poll_url = r.json()["polling_url"]
    while True:
        time.sleep(15)
        job = requests.get(poll_url, headers=HEADERS, timeout=30).json()
        if job["status"] == "completed":
            print(job["unsigned_urls"][0])
            return
        if job["status"] == "failed":
            raise RuntimeError(job.get("error", "failed"))

main()

Which parts map across, and which do not?

Does Sume have Grok Imagine Video 1.5 Lite?

Not as a separate id. The Video Router table lists grok-imagine-video-1.5 at 480p and 720p, 4 to 15 seconds, image-to-video only. If you need a 1 or 2 second clip, wan-3.0 is the Sume row that goes down to 2 seconds. Sume's video docs say each submit reserves the provider list price times 1.25 from your workspace USD balance, so read pricing_skus from the catalog for exact rows instead of copying a number from another gateway.