N33 AIN33 AI
A brief in, a script ready to film

Free AI Script Generator for videos, ads and shorts

Model

This free AI script generator writes a video script from a short brief: say the topic, the length and the format, and get the hook, the lines and the scene notes.

Shorts to explainers

Any length you set

Three free models

Claude, GPT, Grok

No account

Needed to start

A bike mechanic in an apron talking to the camera outside a small bike repair shop

Scripts written by our free models

Real answers from our free chat on 9 October 2026, unedited.

Houseplants with drooping leaves on a frosty winter windowsill

30-second short vertical video

Grok 4.5

[WHY YOUR PLANTS DIE IN WINTER] Your houseplants are not dying from cold. Winter light and dry air are the real killers. Tip 1: Water less. Soil stays wet longer in winter, so roots rot. Check the soil first. [WATER LESS] Tip 2: Move them closer to a bright window. Short days mean less light, and that slows growth. [MORE LIGHT] Tip 3: Keep them off radiators and away from heaters. Dry heat burns leaves fast. [SKIP THE HEAT] Save this for winter plant care, and follow for more simple plant tips.

Try this prompt
Five cheap kitchen gadgets in a row on a wooden kitchen counter

YouTube video opening

GPT-5.6 Luna

“Can five-dollar kitchen gadgets actually make cooking easier, or are they just clutter in disguise? Today, we’re testing five gadgets under ten dollars, from a mini chopper to a surprisingly strange egg tool. [B-roll: gadgets lined up with price tags] You’ll see how fast they work, how durable they feel, and whether each one earns a spot in your kitchen. [B-roll: quick tests, close-ups, reaction shots] By the end, we’ll crown the best bargain and reveal which gadget belongs in the junk drawer. If you love honest budget finds, subscribe and let’s start testing!”

Try this prompt
A bike mechanic in an apron talking to the camera outside a small bike repair shop

30-second ad for a local shop

Grok 4.5

Spoke & Chain: 30-second ad [Sunny sidewalk outside the shop. Friendly mechanic in an apron looks to camera, holding a wrench.] Hey neighbors. That weird click in your bike? Or brakes that feel a little soft? Small stuff turns into big headaches if you wait. [Cut to: bike on a stand, hands tightening a chain, then a quick spin of the wheel.] At Spoke & Chain, we fix it fast and keep you rolling. This month, bring your bike in for a free safety check. We will look over brakes, tires, chain, and gears, on us. [Mechanic smiles, gestures toward the shop door.] Stop by Spoke & Chain. [address]

Try this prompt

How to use the AI script generator

From a one-line brief to a script you can read to camera.

1
Describe the video

Say the topic and who it is for.

2
Set length and format

Name the seconds and the format, from a short to an explainer.

3
Read it aloud

Ask for a sharper hook, then film it or give it to a presenter.

How fast do the free models write a script?

We sent the 3 prompts above to each free model on 9 October 2026. GPT-5.6 Luna finished first on average, Grok 4.5 wrote the longest answers. Every model wrote a usable script; pick by the voice you like.

ModelFirst words afterFull answer afterAverage length
01Claude Haiku 4.59 s11 s98 words
02GPT-5.6 Luna5 s5 s77 words
03Grok 4.59 s14 s104 words
Time to the full answer
Claude Haiku 4.5
11 s
GPT-5.6 Luna
5 s
Grok 4.5
14 s
Measured by us on 9 October 2026: 3 prompts per model, sent once each through our own chat, timed from sending to the end of the answer. Averages, rounded to the second.

What is an AI script generator?

An AI script generator is a chat model that writes the words of a video: the hook, the lines and notes on what is shown.

When the script is right, the AI avatar video generator turns it into a talking presenter video with no camera.

Scripts people write

  • YouTube videosHook, points, B-roll notes.
  • Short vertical videosThirty seconds with on-screen text.
  • AdsA problem, the fix, one offer.
  • ScenesScreenplay format for a short film.

Questions about the AI script generator

Short answers about writing video scripts with AI.

Yes. Chat models write video scripts well when you give them a topic, a length and a format. This page sets that up: pick a starter, fill in the topic and send it.

Yes. It runs in the free chat on Claude Haiku 4.5, GPT-5.6 Luna and Grok 4.5, which works without an account and without a card. Guests have a daily limit, and a free account lifts it.

Plan on roughly 150 spoken words for each minute. A 30-second short is about 70 words, a 60-second explainer about 150. Say the length in seconds and the script follows it.

Yes. Use the Short vertical video starter: it asks for a hook in the first two seconds, quick points and on-screen text cues in brackets.

It writes scenes in screenplay format, with headings, action and dialogue. For a whole film, outline it first and ask for it scene by scene, steering between scenes.

Yes. Paste a short script into the AI avatar video generator, pick a presenter and a voice, and it reads your script on camera.

Each free model has its own voice. The table above shows how fast each one answered our briefs; run your brief on two of them and keep the better script.

Yes, as your draft. Check every fact and number, and read it aloud once: a line that looks fine on screen can sound stiff when spoken.

Reviewed by Arthur Down, editor · Updated · How we check facts