LTX 2.3

Overview

LTX 2.3 by Lightricks is an open-source 22B parameter diffusion transformer that generates native 4K video with synchronized audio in a single pass. A breakthrough in open-source video generation.

Key Strengths

• Open source: Fully open weights, run locally
• 4K native: Generates at 4K resolution without upscaling
• Audio sync: Generates video AND matching audio simultaneously
• 22B parameters: Large enough for quality, efficient enough to run
• Single pass: Video + audio in one generation, no separate audio model

Best Use Cases

Use Case	Quality
Background video content	Very Good
Social media clips	Good
Audio-synced scenes	Excellent (unique feature)
Batch generation	Excellent (run locally, no API costs)

Access

• Hugging Face: Open weights
• Requirements: 24GB+ VRAM (A6000, RTX 4090)
• Also available via Replicate and fal.ai APIs