Open-source video generation optimized for speed on NVIDIA RTX hardware
LTX Video is an open-source video generation model developed by Lightricks with NVIDIA backing, built for fast local inference on NVIDIA GPUs. On an RTX 4090 it generates clips roughly 3x faster than comparable open-source models, which makes iteration practical instead of painful. Native 4K output is supported. ComfyUI integration is solid, and the model fits into node-based workflows without friction. For users who want a managed interface rather than local setup, Lightricks offers LTX Studio as a cloud front-end. The trade-offs: best performance requires an RTX 40-series or newer card; older NVIDIA hardware and AMD GPUs will see smaller speed gains. The training dataset is smaller than what closed-source commercial models train on, which shows up in some edge cases. Documentation is thinner than you'd get from a platform like Runway. Technical setup is required for local deployment.
Creators with NVIDIA RTX 40-series GPUs who want fast local video generation, and developers building ComfyUI workflows that need 4K output without cloud costs.
Non-technical users without local GPU setup experience, anyone without an NVIDIA GPU, or teams that prefer a managed cloud service with vendor support.
Native 4K at 50fps — first open-source model at this quality
Joint audio+video generation — synchronized sound
19B parameter model with NVFP8/NVFP4 quantization
3x faster, 60% less VRAM with NVIDIA RTX optimization
ComfyUI integration with 40% performance boost
RTX Video node for real-time 4K upscaling
Multi-keyframe support for precise control
Weight streaming for mid-range GPU support
Apache 2.0 license (commercial use under $10M ARR)
Up to 20 seconds per generation
Max Video Length
Up to 20 seconds
Max Resolution
4K (3840x2160) at 50fps
Supported Formats
MP4
Difficulty
Advanced
Free — $0/mo
Detailed pricing information is not available yet. Please visit the official website for up-to-date pricing.
Completely Free to Use
LTX-2 is a Open-source video generation optimized for speed on NVIDIA RTX hardware. It is an AI-powered video tool designed to help creators produce professional video content.
LTX-2 is completely free to use.
LTX-2 is geared toward advanced users and professionals. It offers powerful capabilities but may require some experience with video editing or AI tools to use effectively.
LTX-2 is a free AI video tool that earned an editorial score of 4.5 out of 100 from our review team. Key capabilities include Native 4K at 50fps — first open-source model at this quality, Joint audio+video generation — synchronized sound, 19B parameter model with NVFP8/NVFP4 quantization, and 7 more features. It is best suited for creators with nvidia rtx 40-series gpus who want fast local video generation, and developers building comfyui workflows that need 4k output without cloud costs..
Our editorial process is designed to give you honest, up-to-date information you can trust.
Every tool is tested personally — we generate real videos, stress-test edge cases, and evaluate output quality, not just features on a spec sheet.
Tools are scored across four dimensions: output quality, feature depth, ease of use, and value for money. Scores are assigned independently before writing.
AI video tools evolve fast. We revisit reviews when major updates ship, so the scores and details you read reflect the current version.
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Written by
Founder & Lead AI Video Researcher
Sam has spent 3+ years hands-on testing AI video tools, helping creators navigate an overwhelming market and find tools that actually deliver. Covers everything from text-to-video generators to AI editing suites.
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