LTX-2.3 ComfyUI Workflow Examples

Learn how to use LTX-2.3 in ComfyUI for enhanced audio-video generation with improved details and portrait support

LTX-2.3 is the latest evolution of Lightricks’ open-source audio-video generation model, now natively supported in ComfyUI. Building on LTX-2, this release delivers major quality improvements across fine details, portrait video, audio, image-to-video, prompt understanding, and text rendering.

Portable or self deployed users

Make sure your ComfyUI is updated.

• Download ComfyUI
• Update Guide

Workflows in this guide can be found in the Workflow Templates. If you can’t find them in the template, your ComfyUI may be outdated. (Desktop version’s update will delay sometime)

If nodes are missing when loading a workflow, possible reasons:

1. You are not using the latest ComfyUI version (Nightly version)
2. Some nodes failed to import at startup

Desktop or Cloud users

• The Desktop is base on ComfyUI stable release, it will auto-update when there is a new Desktop stable release available.
• Cloud will update after ComfyUI stable release.

So, if you find any core node missing in this document, it might be because the new core nodes have not yet been released in the latest stable version. Please wait for the next stable release.

Key features

• Finer details: New latent space & updated VAE for sharper textures, cleaner edges, and more precise visuals
• 9:16 Portrait support: Greatly improved quality for vertical portrait videos, perfect for social media & mobile
• Better audio: Cleaner sound with reduced noise, enhanced dialogue, music, and ambient audio
• Improved image-to-video: More consistent motion and fewer glitches, such as frozen frames, for smoother, more natural animations
• Smarter prompt understanding: Improved text encoder for more accurate interpretation of complex prompts
• Clearer text rendering: More accurate text and letter rendering in videos

Getting started

LTX-2.3 is natively supported in ComfyUI. To get started:

1. Update ComfyUI to the latest version
2. Go to Template Library > Video > choose any LTX-2.3 workflow
3. Follow the pop-up to download models and run the workflow

Workflows

Image-to-video

Generate videos from an input image with more consistent motion and smoother animations.

Image-to-Video

Download workflow

Run on Comfy Cloud

Open in cloud

Text-to-video

Generate videos from text prompts with improved prompt understanding and text rendering.

Text-to-Video

Download workflow

Run on Comfy Cloud

Open in cloud

Model downloads

Checkpoints

Name	Description	Download
ltx-2.3-22b-dev	BF16 full model	Download
ltx-2.3-22b-dev-fp8	FP8 quantized model	Download

LoRAs

Name	Download
ltx-2.3-22b-distilled-lora-384	Download

Latent upscale models

Name	Download
ltx-2.3-spatial-upscaler-x2-1.0	Download

Text encoders

Name	Download
gemma_3_12B_it_fp4_mixed	Download

Model storage location

ComfyUI/
├── models/
│   ├── latent_upscale_models/
│   │   └── ltx-2.3-spatial-upscaler-x2-1.0.safetensors
│   ├── checkpoints/
│   │   ├── ltx-2.3-22b-dev-fp8.safetensors
│   │   └── ltx-2.3-22b-dev.safetensors
│   ├── loras/
│   │   └── ltx-2.3-22b-distilled-lora-384.safetensors
│   └── text_encoders/
│       └── gemma_3_12B_it_fp4_mixed.safetensors

Resources

• Hugging Face Model
• GitHub Repository
• ComfyUI-LTXVideo