lightricks/ltx-2.5-fast is Lightricks' speed-optimized AI video generation model, designed for rapid creation of high-quality videos with synchronized audio. It supports both text-to-video and image-to-video generation, making it suitable for creators who need fast iteration, social content, prototyping, and high-volume video production. The model can generate videos up to 20 seconds at 1080p and supports resolutions up to 4K, portrait and landscape formats, multiple frame rates, and start-to-end frame interpolation for controlled transitions between two images.