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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.
Make sure your ComfyUI is updated.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 If you can’t find them in the template, your ComfyUI may be outdated.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

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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

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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

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Workflows

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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

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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

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Model downloads

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Checkpoints

NameDescriptionDownload
ltx-2.3-22b-devBF16 full modelDownload
ltx-2.3-22b-dev-fp8FP8 quantized modelDownload

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LoRAs

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

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Latent upscale models

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

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Text encoders

NameDownload
gemma_3_12B_it_fp4_mixedDownload

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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

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Resources