Video Gen Editor

LTX-2.3 Fast: Low-Cost AI Video, Driven by Your Audio

LTX-2.3 Fast is one of the cheapest ways to make HD video in the studio, from $0.03 a second at 720p. It's also the one to pick when a song or voice track should drive the picture: attach an audio file and it generates the video around it, with your audio merged into the finished clip.

Free sign-up · see the cost before you generate

LTX-2.3 Fast specs

Made by
Lightricks
Clip length
1 to 20 seconds
Resolutions
720p, 1080p, 2K
Shapes
Any size (custom width and height)
Starts from
Text, Image, Audio
Extra inputs
Up to 10 keyframes, an audio track
Sound
Generated with the video
Frame rate
1 to 120 fps

LTX-2.3 Fast pricing

LTX-2.3 Fast price per resolution
ResolutionPer second5-second clip10-second clip
720p$0.03$0.15$0.30
1080p$0.06$0.30$0.60
2K$0.12$0.60$1.20

These are the published per-second rates. The composer shows the exact estimate for your settings before you generate, and failed generations aren't charged. Prices last checked September 24, 2026. Credits come with our plans.

What it's good at

  • Audio-conditioned video: your track goes into the model, so the motion follows the music.
  • Any length from 1 to 20 seconds.
  • Custom sizes instead of fixed presets, up to 2K.
  • Up to 10 frame images to guide the motion.
  • Any frame rate from 1 to 120 fps.
  • LoRA support and an optional prompt enhancer.

Best for

  • Music videos

    One clip per section of the song, in the AI music video generator.

  • Lyric videos

    Short on-screen lines over visuals, in the lyric video generator.

  • Cheap drafts

    Test ideas at 720p for a few cents a clip.

  • Experiments

    Unusual frame rates, custom sizes and LoRA styles.

Things to know

  • It uses up to 30 seconds of audio per clip.
  • Audio is attached by URL for now; direct audio upload isn't available yet.
  • Quality is solid rather than premium. Re-render hero shots on a bigger model if they need it.
  • It tops out at 2K.

A LTX-2.3 Fast prompt to try

Neon-lit city street at night seen from a moving car, rain on the windscreen, lights streaking past in time with the beat, 80s synthwave colours.

Attach the track by URL with the + button, then generate one clip per section of the song and line them up in your editor.

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Frequently asked questions

How do I make a video from a song with LTX-2.3 Fast?

Attach the audio file by URL, describe the visuals, and generate. The model uses up to 30 seconds of your track and merges it into the finished clip.

How much does LTX-2.3 Fast cost?

$0.03 a second at 720p, $0.06 at 1080p and $0.12 at 2K. A 10-second 720p clip is about $0.30.