4 AI Extension Models

Extend Your Videos with AI

Make any video longer with AI. Choose from 4 extension models — Veo 3.1, LTX 2.3, PixVerse, and Grok — to seamlessly continue your footage with AI-generated frames, up to 4K with audio.

Models

20s

Max Extension

Up to 2160p

Audio

With Veo 3.1

Try Video Editor Compare Models

4 AI Models to Extend Your Videos

Each model offers different strengths for AI video extension. Pick the one that fits your project.

Veo 3.1

Google

Extension 7s fixed
Audio Yes (generated)
Output 720p
Max input 8s

Premium Plan

LTX 2.3

Lightricks

Extension Up to 20s
Direction Start or End
Output Up to 2160p
Audio No

All Plans

PixVerse

Extension 5s or 8s
Styles Anime, 3D, Clay, Comic, Cyberpunk
Output Up to 1080p
Audio No

All Plans

Grok

xAI

Extension 2-10s
Max input 720p
Output 720p
Audio No

Pro+ Plan

AI Video Extension Models Compared

Side-by-side comparison of all 4 video extension models on Aura AI

Feature	Veo 3.1	LTX 2.3	PixVerse	Grok
Provider	Google	Lightricks	PixVerse	xAI
Extension length	7s fixed	Up to 20s	5s or 8s	2-10s
Max output resolution	720p	2160p (4K)	1080p	720p
Audio generation	Yes	No	No	No
Extend direction	End only	Start or End	End only	End only
Style options	None	None	Anime, 3D, Clay, Comic, Cyberpunk	None
Max input length	8s	No limit	No limit	No limit
Plan required	Premium	All plans	All plans	Pro+

How to Extend a Video with AI

Make any video longer in three simple steps

Upload Your Video

Open the Video Editor and upload the video you want to extend. Supports all common video formats including MP4, MOV, and WebM.

Choose a Model

Select one of the 4 extension models. Optionally add a prompt to guide the AI on how the video should continue, and pick your preferred extension length.

Download the Extended Video

The AI generates new frames that seamlessly continue your video. Download the result in HD with no watermark. Extend again to make it even longer.

Use Cases for AI Video Extension

Common scenarios where extending videos with AI saves time and unlocks creativity

Social Media Content

Turn a short clip into a longer video that meets platform minimum length requirements for TikTok, Instagram Reels, or YouTube Shorts.

AI-Generated Video Loops

Extend AI-generated clips to create longer sequences. Generate a base video with text-to-video, then use video extension to build out the full scene.

B-Roll and Stock Footage

Extend stock footage or b-roll clips that are too short for your edit. The AI continues the scene naturally, saving you from buying additional footage.

Music Videos and Visualizers

Create longer visual sequences for music videos. Use PixVerse style options like anime, cyberpunk, or 3D to match your artistic vision.

Product Demos

Extend product demo videos to show more of the experience. Let AI continue a walkthrough or showcase that ended too soon.

Cinematic Storytelling

Add context to a scene by extending from the beginning with LTX 2.3, or continue a dramatic moment further with any extension model.

Frequently Asked Questions

Everything you need to know about extending videos with AI

What is an AI video extender? +

An AI video extender uses artificial intelligence to generate new frames that continue your existing video, making it longer. Instead of re-shooting or editing manually, the AI analyzes your video's content, motion, and style, then creates a seamless continuation. Aura AI offers 4 video extension models: Veo 3.1, LTX 2.3, PixVerse, and Grok.

How long can I extend a video with AI? +

Extension length depends on the model you choose. LTX 2.3 supports up to 20 seconds per extension. Grok allows 2 to 10 seconds. Veo 3.1 adds a fixed 7-second extension. PixVerse offers 5 or 8 second extensions. You can run multiple extensions to make your video progressively longer.

Can I extend a video from the beginning instead of the end? +

Yes. LTX 2.3 supports extending a video from either the start or the end. This lets you add a lead-in or intro to your existing footage. Other models currently extend from the end of the video only.

What video quality can I expect from AI video extension? +

Quality varies by model. LTX 2.3 supports output up to 2160p (4K). PixVerse outputs up to 1080p. Veo 3.1 outputs at 720p with audio generation included. Grok accepts up to 720p input. All extensions are delivered without watermarks and in standard MP4 format.

Does AI video extension add audio to the extended portion? +

Veo 3.1 by Google is the only extension model that generates audio alongside the extended video, including dialogue, sound effects, and ambient sounds. All other models (LTX 2.3, PixVerse, Grok) generate video frames only for the extended portion.