AI Ad Video Generator for Short Vertical Creatives

Test ten hooks instead of one. Each prompt becomes a 5-second portrait clip you drop into a Meta or TikTok ad. $1 per clip, no watermark.

Paid social rewards volume of creative, and filming ten variants is what kills most small budgets. Sisif makes the variants cheap: a 5-second 540x960 render is 12 credits, so a $10/month plan buys 8 test clips a month. Render the visual, add the copy and the call to action in your ad platform, and let the auction tell you which hook works. Exports carry no watermark.

A short prompt is one 5 s clip at $1. A timeline is a story, $1 per 5 s, priced before you pay.

See the specs

$1 a clipNo watermarkNo subscriptionCredits never expire

Sisif · terms
sisif.ai · rendered on our own GPUs
Watermarknone, ever
Credit expirynever
Failed rendercredits returned
Commercial useincluded
Subscriptionnone required
Modelopen weights, our GPUs
Agentspay per clip over the API
1 × clip, 5 s, 540x960$1
Total$1
Same terms on clips, and on every monthly plan.

What you get

Feature Sisif
Price $1 a clip, no subscription
Watermark None, on every plan
Cost of a 5-second clip 12 credits at 540x960, 30 at 720x1280
Model Open weights
Export MP4, portrait
Cost per test clip 12 credits (540x960) to 30 credits (720x1280)

How it works

01

Describe the clip

Write what should happen in 5 seconds: the subject, the style, the camera move. The prompt stays attached to the render, so you can see what made each clip.

02

We render it

An open-weights model on GPUs we operate turns the prompt into a 540x960 portrait clip, most of the time in 2-5 minutes. A failed render returns the credits.

03

Download and publish

One MP4, no watermark, yours to publish anywhere, commercial use included. Pay $1 for the clip; nothing recurring.

Prompt tips

  1. 01 Write one prompt per hook and change only the opening image between variants.
  2. 02 Ask for motion toward the camera; it holds attention in the first second.
  3. 03 Keep the product or logo out of the render and overlay it in the ad tool so it stays crisp.

Frequently asked questions

How much does the AI Ad Video Generator cost?

Every clip is $1. One payment buys one 5-second portrait render, with no subscription. Monthly plans start at $10/month when you want volume.

Does Sisif put a watermark on a ad video?

No. Every export is a clean MP4 with no watermark or logo, on a single clip and on a monthly plan alike.

How long does a ad video take to generate?

A few minutes. You type the prompt, Sisif renders a 5-second portrait clip with an open-weights video model, and you download the MP4 from your library.

Explore more

Recent renders, with the prompt that made each one 5 s · 540x960 portrait
01Three girlfriends clink flutes on a hidden sandbar; swimsuit-model poses.
02Epic overhead shot of a desert glamping site in Morocco: starlit sky, lantern-lit tents, travelers sharing stories around a crackling fire, Milky Way time-lapse spiraling above, soft acoustic outro.
03“Golden-Hour Hammock Stories” – A newlywed bride lounges in a palm-strung hammock, reading a love note aloud while her partner films close-ups of her sun-kissed skin and relaxed smile.
04A barefoot couple wrapped in a linen sheet, standing on a balcony overlooking turquoise waves at sunrise
05“Bridal Bubbles at Dawn” – The bride, still in her delicate lace cover-up, the sunrise casting a blush glow over the scene.
06Uncover the history of Sorrento as an ancient Roman resort on a half day walking tour of the city centre.

Ready to make a clip?

Every clip is $1. No watermark, no subscription, and the credits you buy never expire.

Render a clip See pricing
Render a clip 5 s · 540x960 · no watermark · nothing expires