LTX 2.5
Generate up to 20 seconds 4K videos with sync'd audio.
LTX 2.5: Video With Native Audio, Up to 4K and 20 Seconds
LTX 2.5 is Lightricks’ video model that generates video with synced audio baked in. Write a prompt or attach a starting image, pick a length up to 20 seconds, and get a finished clip with sound at up to 4K.
It comes in two tiers. Pro is the quality pick at 720p or 1080p, 6 to 10 seconds. Fast trades some polish for range: it’s cheaper per second and unlocks 1440p, 4K, 48 fps, and durations up to 20 seconds.
What can you do with it?
- Generate a scene from text. Describe the shot, the light, the pacing. LTX 2.5 renders the clip and its soundtrack together: ambience, effects, and voices that match the picture.
- Animate a still image. Attach a first frame and describe the motion. The video starts exactly on your image and follows its aspect ratio.
- Control the start and end. Add a last frame too and LTX generates the transition between the two.
- Direct the camera. Pick a camera move (dolly in, dolly out, left, right, jib up, jib down, static, or a focus shift) instead of hoping the prompt lands it.
- Go long. On the fast tier a single generation runs up to 20 seconds, enough for a full beat instead of a snippet.
How to use it
- Write the prompt. Be concrete about subject, camera, light, and sound. Up to 5000 characters, so there’s room for detail.
- Attach frames if you have them. A first frame anchors the look; an optional last frame pins the ending.
- Pick the tier. Pro for the best image quality, Fast for 4K, high frame rates, and long durations at a lower price.
- Set length and size. Leave duration on Auto to let the model fit the length to the content, or pick 6 to 20 seconds. Resolution goes from 720p to 4K, in 16:9 or 9:16.
What you get
One mp4 with native audio, 6 to 20 seconds long, at your chosen resolution and frame rate. Audio is included at every resolution; you can switch it off if you only want the picture.
Tips
- Describe the sound too. The audio is generated from the same prompt as the video. “Rain on a tin roof, distant thunder” gets you a soundtrack, silence about sound gets you a guess.
- Use Auto duration for dialogue and action. The model picks a length that fits the motion instead of padding or cutting.
- Pick a camera move for product and architecture shots. A slow dolly in reads as intentional; unprompted camera drift rarely does.
- Start at 1080p, upscale the keeper. Iterate cheap, then re-run the winning prompt at 1440p or 4K on the fast tier.
- Match the frame rate to the feel. 24 fps for a filmic look, 48 or 50 for smooth motion and sports-style clips.