Now the cheaper LTX API tier, it suits creators who want to run video locally or pay less per second than LTX-2.5.

Kenning's take

What it does

LTX-2.3 is a 20.9 billion parameter open-weight video model from Lightricks that generates video with audio at up to 4K and runs on consumer graphics cards without the cloud. Compared with LTX-2 it brought sharper detail, cleaner audio, better image-to-video motion, native 9:16 portrait video and first-and-last-frame control. It is still offered in the LTX API as ltx-2-3-fast and ltx-2-3-pro, though LTX-2.5 is now the newer model.

• 20.9 billion parameters
• Video with synchronised audio up to 4K
• Native portrait (9:16) generation
• First and last frame interpolation
• Retake and extend endpoints on Pro
• Runs locally on consumer GPUs

Who it suits. Creators and studios who want to generate video locally, and developers wanting a cheaper API tier.

Key facts

Category

AI models

Part of

LTX Studio

Made by

Lightricks

Released

5 March 2026

How to get it

open weights on Hugging Face; LTX API (ltx-2-3-fast, ltx-2-3-pro); LTX Desktop app; commercial licence needed above $10M annual revenue

Works on

API, self-hosted, LTX Desktop

In the UK

Yes

Free plan

open weights free under $10M annual revenue

API price

ltx-2-3-fast $0.03/s 720p, $0.06/s 1080p, $0.24/s 4K; ltx-2-3-pro $0.04/s 720p, $0.08/s 1080p, $0.32/s 4K

FAQ

Facts from the maker's own pages and the sources listed. Checked 2026-10-11.