LTX-2.3
LTX-2.3 is Lightricks' open-source video model that runs locally and outputs native 4K with synced audio. Best for creators who want 4K, local, and low-cost.
The Spinoza Score
Reviewed by Kamran Arshad. See how we evaluate · Updated 2026-07-13.
- Type
- Video Model
- Category
- video generation
- Starts at
- Free
- Platforms
- Launched
- Mar 2026
- Last reviewed
- 2026-07-13
The open model that runs on your own GPU. Native 4K, synced audio, and the best economics in the field.
LTX-2.3 is the standout for accessibility: open weights, native 4K at up to 50fps, synchronized audio, and it runs locally on a single RTX 4090. Lightricks even ships a desktop editor so the whole thing works on consumer hardware, with permissive commercial licensing. It won't quite match Veo or Kling on top-end realism, but for 4K output, local control, and up-to-50%-lower cost, nothing else comes close.
Best for
- 4K output on a budget
- Local, private generation
- Open weights and licensing
Not for
- The very top-end realism
- Those without a capable GPU
What it actually does
Native 4K, up to 50fps
Sharp 4K output with high frame rates and clean motion.
Runs locally
Generates on a single RTX 4090, no cloud required.
Open weights + code
Fully open with training code and permissive commercial licensing.
Synchronized audio
Video and audio generated together in one coherent pass.
Desktop editor
A local app so the whole workflow runs on consumer hardware.
Lowest cost
Up to 50% lower compute cost than competing models.
Composite of hands-on testing and editorial review — five dimensions, each rated 0–5 against the same published rubric for every tool in the category. How we score →
- Overall
- 4.4/5
- Motion & Realism
- 4.3/5
- Prompt Adherence
- 4.2/5
- Creative Control
- 4.3/5
- Audio & Sync
- 4.3/5
- Value
- 4.8/5
What it costs, by tier
Open source, free to run locally (commercial use free under $10M ARR); hosted/API options available. Confirm current pricing.
Free to run on your own GPU.
Usage-based hosted options.
Frequently Asked Questions
Can LTX-2.3 run on my computer?
Yes, it runs locally on a single NVIDIA RTX 4090, with a desktop editor for the full workflow.
Is LTX free?
It's open source and free to run locally, with commercial use free under $10M ARR. Hosted options are also available.
What is LTX-2.3 best for?
Creators who want native 4K video, local and private generation, and the lowest cost, with open weights.
LTX or Happy Horse?
Both are open. LTX leads on native 4K and running locally; Happy Horse on top open-model quality rankings.
Ready to try LTX-2.3?
Native 4K video that runs on your own GPU.
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