LTX 2.3 AI Video Generator is an open-source tool that converts text descriptions or images into high-fidelity 4K videos with synchronized audio, powered by a Diffusion Transformer and running on cloud GPUs.
What is LTX 2.3?
LTX 2.3 is the latest video generation model from Lightricks, released under the Apache 2.0 license. It takes text prompts, still images, or audio clips and produces up to 20-second video clips with matching audio in a single forward pass. The model supports resolutions up to 4K (3840×2160), frame rates of 24/25/48/50 FPS, and both landscape (16:9) and native portrait (9:16) aspect ratios. It runs entirely on cloud-hosted GPUs via a web browser, requiring no local hardware.
What makes LTX 2.3 stand out?
- Text-to-video with strong prompt adherence: A 4× larger gated attention text connector accurately follows complex multi-clause prompts including camera angles, timing cues, and emotional tone.
- Image-to-video: Upload a still image to generate natural motion (liquids flowing, fabrics billowing, characters moving) while preserving visual consistency with the source.
- Synchronized audio generation: Ambient sound, music, and sound effects are synthesized in the same forward pass as video — no separate audio model or post-production syncing required.
- 4K resolution and native portrait mode: Output up to 3840×2160 with properly composed vertical video (9:16) trained natively, not cropped from landscape.
- Redesigned VAE: Improved latent space reconstruction delivers sharper edges, cleaner textures, and fewer artifacts at high resolutions, even in fast-motion sequences.
- Open-source under Apache 2.0: Model weights on Hugging Face, training code and ComfyUI nodes on GitHub — free for commercial and research use.
- Input/output moderation: Built-in safety controls for compliance, including optional input/output review and blocking.
- Video extension workflow: Chain multiple generations to create clips longer than 20 seconds while maintaining scene consistency.
Who should use LTX 2.3?
- Social media creators: Generate native 9:16 portrait videos with synchronized sound for TikTok, Instagram Reels, and YouTube Shorts in minutes.
- Filmmakers and animators: Pre-visualize shots from scripts — camera angles, scene timing, character staging — before committing budget to live production.
- E-commerce teams: Transform static product photos into cinematic demo videos with realistic lighting and motion for A/B testing across platforms.
- Educators and course builders: Create illustrative clips (molecular animations, historical recreations, scientific visualizations) without hiring motion graphics teams.
What can you do with LTX 2.3?
- Short-form content: Generate scroll-stopping vertical videos with built-in audio, ready to upload directly to social platforms.
- B-roll for YouTube: Turn text prompts into cinematic aerial flyovers, product close-ups, and establishing shots that match broadcast frame rates.
- Concept pitches: Produce polished demo videos for clients or stakeholders in minutes using Fast mode for quick iterations and Pro mode for final output.
- Audio-to-video: Provide an audio clip and generate matching video aligned to beats, tempo, and rhythm — for music visualizations or sound-driven content.
How does LTX 2.3 work?
- Write a prompt — describe the scene with specifics (camera angle, lighting, mood, subject motion) or upload a reference image.
- Configure settings — choose aspect ratio (16:9 or 9:16), clip length (6–20 seconds), resolution (1080p, 2K, 4K), and frame rate (24–50 FPS), plus Fast or Pro quality mode.
- Generate — the Diffusion Transformer processes the input through its VAE and text connector, producing video and audio frames in a single forward pass on cloud GPUs.
- Preview & export — watch the clip in-browser, refine if needed, then download the final video at your chosen resolution.
Pricing
Freemium model. A free tier is available with no credit card required to start generating videos.
Alternatives
- RunwayML (Gen-2) — a closed-source AI video generator with similar text-to-video and image-to-video capabilities but without open-source access.
- Pika Labs — offers text-to-video and image-to-video generation with a focus on style control, not open-source.
FAQ
What input formats does LTX 2.3 support?
Text prompts, uploaded images (for image-to-video), and audio clips (for audio-to-video) are all supported. Image-to-video accepts still photos and maintains visual consistency.
Is LTX 2.3 free to use?
Yes, there is a free tier accessible without a credit card. The platform runs on cloud GPUs and does not require local installation.
Does LTX 2.3 require a powerful computer?
No. All generation happens on cloud servers. You only need a web browser and internet connection.
Can I use LTX 2.3 for commercial projects?
Yes. The model is released under Apache 2.0, which permits commercial use. The hosted platform also allows commercial generation.
How long can a generated video be?
Single-pass generation produces clips up to 20 seconds. Longer clips can be created by chaining multiple generations using the video extension workflow.
