Singles' Day 11.11 is a Wednesday: eleven 4-second clips for $2.75

Eleven clips of 4 seconds at 480p cost $2.75 on Sume with Wan 3.0, and $5.50 at 720p. Wan lists $0.05 per second at 480p and $0.10 at 720p; Sume bills the list price times 1.25, so $0.0625 and $0.125 per second, which makes one 4-second clip $0.25 at 480p and $0.50 at 720p.

November 11 falls on a Wednesday in 2026, 15 days before Thanksgiving. Eleven clips suit a 11.11 countdown: one per hour, or one per product in a collection, ending on 11.11.

Cost grid

Wan 3.0 takes 2 to 30 seconds at 480p, 720p or 1080p. These totals multiply the documented rates; Sume rounds each job up to the next cent, which does not change them here.

Submit eleven jobs

Use the same style line in every prompt and change only the product. A stable idempotency key per slot means a retry cannot double-bill. Eleven jobs fit inside a Pro workspace's 24 accepted jobs, but not a Free one (6 accepted), so on Free send them in two waves.

import asyncio, os
import httpx

async def main():
    headers = {"Authorization": f"Bearer {os.environ['SUME_API_KEY']}"}
    async with httpx.AsyncClient(headers=headers, timeout=60) as c:
        for n in range(11, 0, -1):
            r = await c.post("https://api.sume.com/v1/videos",
                headers={"Idempotency-Key": f"singles-day-2026-{n}"},
                json={"model": "wan-3.0", "duration": 4, "resolution": "480p",
                      "aspect_ratio": "9:16",
                      "prompt": f"Product on a red background, bold motion, slot {n} of 11"})
            r.raise_for_status()
            print(n, r.json()["id"])

asyncio.run(main())

Add the number afterwards

Do not ask the video model to render the countdown digit. Put "11", "10" and so on on afterwards with Video captions cues, which burn authored text at the times you give, with no speech needed. Text from a video model is often wrong.

Check the date for your market; Singles' Day is a Chinese shopping event whose name comes from its date, and your own promotion may run on another day.

• 480p is fine for a draft; re-render the winners at 720p.
• Re-rolling one 480p slot costs $0.25.
• Trim or loop with Timeline at $0.10 per output minute.