4 AI extension models

AI Video Extender
Make any video longer

Your clip ends too soon? The AI continues it — new frames that match the motion, lighting and style of your footage. Up to 4K, with generated audio, no watermark.

✓Up to 20s per extension ✓Extend from start or end ✓Up to 4K output ✓Audio generation (Veo 3.1)
Extend your video → Compare the 4 models

4 AI models to extend your videos

Each model has different strengths. Pick the one that fits your footage.

Google Veo

Veo 3.1

Google
  • Extension 7s fixed
  • Audio Yes, generated
  • Output 720p
  • Max input 8s
Premium plan
LTX

LTX 2.3

Lightricks
  • Extension Up to 20s
  • Direction Start or end
  • Output Up to 4K
  • Audio No
All plans
PixVerse

PixVerse

PixVerse
  • Extension 5s or 8s
  • Styles Anime, 3D, Clay +
  • Output Up to 1080p
  • Audio No
All plans
Grok

Grok

xAI
  • Extension 2–10s
  • Max input 720p
  • Output 720p
  • Audio No
Pro+ plan

Extension models compared

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

FeatureVeo 3.1LTX 2.3PixVerseGrok
ProviderGoogleLightricksPixVersexAI
Extension length7s fixedUp to 20s5s or 8s2–10s
Max output720p2160p (4K)1080p720p
Audio generationYesNoNoNo
Extend directionEnd onlyStart or endEnd onlyEnd only
Style optionsNoneNoneAnime, 3D, Clay, Comic, CyberpunkNone
Max input length8sNo limitNo limitNo limit
Plan requiredPremiumAll plansAll plansPro+

How to extend a video with AI

Make any video longer in three steps.

1

Upload your video

Open the Video Editor and upload the clip you want to extend — MP4, MOV and WebM supported.

2

Pick a model & length

Choose one of the 4 extension models and how many seconds to add. LTX can even extend from the start.

3

Generate & download

The AI renders the continuation matching motion and lighting. Download clean, no watermark. Run it again to keep going.

When you need a longer video

🎬

AI clips that end too soon

Most AI generators stop at 5–10 seconds. Extend the output to build longer scenes without regenerating from scratch.

📱

Social formats

Stretch a clip to fit Reels or TikTok sweet spots, or add a lead-in intro with LTX start-extension.

🔁

Loops & ambient video

Looping clips have a dedicated free Extend Loop that multiplies a seamless loop up to 30 minutes.

Frequently asked questions

What is an AI video extender?

A tool that uses AI to generate new frames that continue your existing video, making it longer. The AI analyzes content, motion and style, then creates a seamless continuation — no re-shooting, no manual editing.

How long can I extend a video with AI?

Depends on the model: LTX 2.3 up to 20 seconds per pass, Grok 2–10s, Veo 3.1 a fixed 7s, PixVerse 5 or 8s. You can run multiple extensions back-to-back to keep making the video longer.

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

Yes — LTX 2.3 extends from either the start or the end, so you can add a lead-in or intro to existing footage. The other models extend from the end.

What quality can I expect?

LTX 2.3 outputs up to 4K, PixVerse up to 1080p, Veo 3.1 720p with generated audio. All downloads are clean MP4 — no watermark.

Does the extension include audio?

Veo 3.1 is the only model that generates audio for the extended portion — dialogue, sound effects and ambience. The others generate video frames only.

Can I extend a looping video?

Yes — seamless loops have a dedicated Extend Loop feature that multiplies the loop up to 30 minutes free, keeping the transition invisible.

Your video, as long as you need it

Upload a clip, pick a model, add seconds. The AI does the rest.

Extend a video now →