Clear CortexAI video
AI video generator
Seedance, Kling, Gemini Omni and Hailuo in one studio. Start from a prompt, a product shot or a script, switch model between shots, and keep every clip in one library.
Open video modePay per clip. No seat, no subscription.
What is an AI video generator?
An AI video generator is a model that makes a video clip from a description, rather than from footage. You give it words, an image, or both, and it returns a few seconds of moving picture — often with sound — that no camera recorded.
Most products called an AI video generator are an interface over one or more of these models. The models are made by a handful of labs (ByteDance, Kuaishou, Google, MiniMax and others), and the same model can sit behind several different apps.
How does an AI video generator work?
Most current models learn what moving images look like from a very large amount of video, then work backwards from noise: they start with a clip of static and remove it step by step until what is left matches your prompt. They do that across the whole clip at once, which is how they keep a person or a product looking like the same thing from the first second to the last.
Your prompt steers it. An image you supply pins it down further — as the first frame, the last frame, or a reference for what something should look like. The newer models generate the audio in the same pass, so footsteps land when the foot does.
If you have never made one, the step-by-step is in how to make an AI video.
Three ways to make AI video
They are not rival products — they are three ways of telling the same model what you want, and most finished pieces use more than one.
Text to video
Words only. The model invents the scene, the people and the camera. Fastest way to explore an idea; least control over what exactly appears — which is why it suits b-roll and mood more than a specific product.
Image to video
A still becomes the first frame, and optionally a second still the last. The model only has to invent the motion, so your product, person and framing survive.
How image to video worksScript to video
A script broken into beats, each beat a shot on a storyboard, each shot its own clip, joined into one video at the end. How anything longer than one take gets made.
From script to storyboard to clipsHow the AI video models differ
Every model below takes a first and a last frame and can generate sound with the clip. What separates them is how long a take can be, how sharp, what shapes it comes in, and whether it accepts extra reference images. Quality claims are the makers' own; these specs are the ones our generator enforces.
| Model | Maker | Resolution | Clip length | Reference images | Best for |
|---|---|---|---|---|---|
| Seedance 2.0 Mini | ByteDance | 480p – 720p | 4–15s | yes | Finding the shot before you commit to it — it bills at half Seedance 2.0's per-token rate, on the same durations and the same seven ratios. |
| Seedance 2.0 | ByteDance | 480p – 4K | 4–15s | yes | Long clips at full resolution — it is the only model here that does 4K and runs past 8 seconds. |
| Seedance 2.5 | ByteDance | 480p – 720p | 4–30s | yes | Long takes: every whole second from 4 to 30 — twice the 15-second ceiling of any other model here. |
| Kling 3.0 Standard | Kuaishou | 720p | 3–15s | frames only | Three-second cuts — the shortest clip any model on this page will make. |
| Kling 3.0 Pro | Kuaishou | 720p | 3–15s | frames only | The take you are keeping, once Standard has settled the shot — the two tiers accept exactly the same lengths, resolutions and ratios. |
| Gemini Omni 1.1 Flash | 720p | 8s | frames only | Clips with sound, generated in the same pass as the picture rather than laid over it afterwards. | |
| Hailuo 3 | MiniMax | 2K | 5–15s | yes | Getting 2K without choosing it — there is one resolution, so there is no size setting to get wrong. |
Choosing between them by job — ads, realism, motion, length, price — and how they compare with generators we don't run is in the best AI video generators, by use case. Every image and video model side by side is on the models page.
AI video guides
How to make an AI video: brief, model, prompt, start frame, iterate, export
How to make an AI video that is usable, not just watchable: write the brief, pick the model for the shot, prompt like a camera operator, start from a still, iterate on images before clips, and export at the right ratio.
Read the guideBest AI video generators: which one to use for ads, realism, motion and length
There is no single best AI video generator — the right one changes with the job. Seedance, Kling, Gemini Omni, Veo, Hailuo and Runway compared by use case, from their makers' own pages — checked November 2026.
Read the guideImage to video AI: how it works, start and end frames, and which models do it best
Image-to-video AI turns a still into the first frame of a clip and lets the model fill in the motion. How start and end frames work, what makes a good source image, and where each model is strongest.
Read the guideScript to video AI: from script to storyboard to finished clips
Script to video works best as four steps you can check, not one button: break the script into beats, give each beat a shot, make each shot a clip, then join them. How that works, and where it still needs you.
Read the guideMore questions about AI video
How long can an AI video be?
A single generation is short — usually between 3 and 15 seconds. The longest single take in our studio is 30 seconds, on Seedance 2.5. Anything longer is several clips joined together, which is what a storyboard is for.
Is AI video good enough for ads?
For a lot of formats, yes — product shots, b-roll, scene-setting, short hooks. It is weakest where the exact product has to stay exactly right while it moves (labels, jewellery, hands holding things), and on long continuous takes. Practitioners get around both by starting from a real still and cutting short.
Can I use my own images?
Yes. Every video model in the studio takes a first frame and a last frame, so you can start a clip on your own product shot and end it on another. Some also take extra reference images for a look, a person or a product.
Exporting for a particular placement? The sizes are in Meta ad specs and where the app covers your frame is in TikTok safe zones.
Make an AI video
Every model above, one login and one pot of credit. Results land in Assets, so the still you start from and the clip you end with sit in the same place.
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