LTX-Video Review — The Fastest Open-Source Video Model and the Architecture That Made It Possible

LTX-Video (Lightricks, November 2024) is a 2B-parameter DiT video model built on a radical VAE with 1:192 compression — 32× spatial, 8× temporal — that lets the transformer work on 8,192 times fewer tokens than raw video pixels. The result is the fastest open-source text-to-video model at its quality tier, with I2V, Apache 2.0, and official ComfyUI support. Paper: arXiv:2501.00103. Rating: 4/5.