LTX 2.3 — Lightricks' 22B Open-Source AI Video Model in PromeAI

Lightricks' 22B open-source audio-video model — native 4K at 50fps with synchronized audio, Apache 2.0 licensed. Run it free in PromeAI.

LTX 2.3 vs other video models in PromeAI

Lightricks LTX vs ByteDance Seedance vs Alibaba Happy Horse — three independent foundations covering different style and licensing trade-offs.

LTX 2.3 prompt examples

Three reference prompts showcasing LTX 2.3's distinctive strengths: 4K resolution, synchronized audio, and longer-duration narrative clips.

4K hero clip with synchronized ambient audio

A polished electric sports car on a coastal highway at sunset, slow dolly tracking from the rear quarter, golden hour reflections on the body, synchronized ambient road and wind audio, native 4K at 50fps, 10-second hero clip.

Multi-language lip-synced dialogue

A barista in a Tokyo cafe slides a cup across the counter and says 'いただきます'. Camera holds at counter level, soft warm lighting, dialogue lip-synced to the spoken Japanese, 1080p output.

Long-form narrative arc

A 20-second narrative: a hand opens an old leather journal, wind ruffles pages outdoors, golden light reveals a hand-drawn map, transitions to camera pull back showing a foggy coastline. Continuous color grade, ambient wind and paper sounds.

How to Use LTX 2.3 on PromeAI

Lightricks' real-time-focused AI video model.

  1. 01

    Sign up to PromeAI

    100 free credits on sign-up; LTX 2.3 is one of the faster models per credit spent.

  2. 02

    Pick LTX 2.3 in the generator

    Choose LTX 2.3 when you need fast iteration speed or when motion strength + seed control matter for your scene.

  3. 03

    Describe and generate

    LTX 2.3 produces short clips quickly; configure motion strength and a fixed seed when you want reproducible results across runs.

LTX 2.3 tutorials on YouTube

Creator tutorials covering LTX 2.3 prompt patterns, 4K workflows, and comparisons with Sora / Runway / Seedance.

LTX 2.3 Just Got Scary Good | Best Local AI Video Generator with Audio? ComfyUI Guide + Workflow

Watch on YouTube ↗

Stop Paying For AI Videos! LTX Video 2.3 is 100% FREE (Better Than Higgsfield)

Watch on YouTube ↗

LTX 2.3 discussions on Reddit

r/StableDiffusion, r/aivideo and r/LightricksAI threads tracking LTX 2.3's open-source release and production workflows.

StableDiffusion

LTX-2 Audio Synced to added MP3 i2v - 6 examples 3 realistic 3 animated - Non Distilled - 20s clips stitched together (Music: Dido's "Thank You")

Heavily modified LTX-2 Official i2v workflow with Kijai's Mel-Band RoFormer Audio model for using an external MP3 to add audio. This post shows how well (or not so well) LTX-2 handles realistic and non-realistic i2v lip sync for music vocals. Link to workflow on my github: [https://github.com/Rag

View 51 comments
StableDiffusion

It is still possible to achieve more natural cinematic realism for videos with open source models vs proprietary models with even basic workflows | Z-Image-Turbo and LTX 2.3

# Overview Z-Image Turbo and LTX 2.3 img2vid combo (also with Flux 2 Klein 9B for additional controls) are actually really strong together for maintaining natural looking styles that feel far more alive than even some shots I would get with Seedance 2.0. # Initial Frames Z-Image Turbo after all

View 43 comments

LTX 2.3 posts on X

Hand-picked X posts featuring LTX 2.3 outputs, prompt walkthroughs, and side-by-side comparisons with closed video models.

LTX 2.3 FAQ

Direct answers to questions about Lightricks LTX 2.3.

What is LTX 2.3?

LTX 2.3 is Lightricks' open-source 22-billion parameter audio-video foundation model, released March 5, 2026. It generates synchronized audio and video natively at up to 4K resolution at 50fps, Apache 2.0 licensed for commercial use.

What makes LTX 2.3 different from Seedance and Sora?

Three distinctions: 1) true 4K@50fps output (Seedance maxes at 1080p, Sora at 1080p standard); 2) Apache 2.0 open-source license with commercial-safe training data; 3) joint audio + video generation in a single pass with no post-production stitching required.

Can I use LTX 2.3 outputs commercially?

Yes. Training data is licensed from Getty Images and Shutterstock, eliminating typical open-model copyright ambiguity. LTX 2.3 outputs are suitable for paid social ads, brand campaigns, product launches, and other commercial use cases.

How is LTX 2.3 different from LTX 2 (the previous version)?

LTX 2.3 ships with a rebuilt variational autoencoder for sharper textures and edges, a 4× larger text connector for stronger prompt adherence, native 9:16 portrait support, LoRA adapter support (up to 3 custom adapters), and an upgraded HiFi-GAN vocoder for cleaner audio.

Does LTX 2.3 support custom LoRA adapters?

Yes — LTX 2.3 supports up to 3 simultaneous LoRA adapters for custom style transfer, character consistency, and fine-tuned visual identity. This is useful for brand-specific creative pipelines.

How do I use LTX 2.3 in PromeAI?

Open PromeAI's image-to-video workspace, pick 'Ltx 2.3' in the model dropdown, set aspect ratio (LTX supports 21:9 ultrawide which other models don't), duration up to 20s, resolution up to 1080p, write a prompt, and click Create.

What aspect ratios does LTX 2.3 support?

LTX 2.3 supports 16:9, 9:16 portrait native, 1:1, 4:3, 3:4, and 21:9 ultrawide — the broadest aspect-ratio coverage of any video model in PromeAI's lineup. Useful for cinema-format clips and platform-specific creative.

Can LTX 2.3 generate dialogue audio?

Yes. LTX 2.3 generates synchronized lip-synced dialogue in multiple languages alongside the video. Specify the dialogue text in your prompt; the model handles audio + visual lip-sync in one pass.

Generate 4K video with LTX 2.3 in PromeAI

Open PromeAI's video workspace with LTX 2.3 preselected. Generate 4K hero clips with synchronized audio — Apache 2.0 commercial-safe.

Open Ltx 2.3 in PromeAI