LTX 2.3: Open-Source 4K Video at 50fps with Synchronized Audio Runs on Consumer GPUs

LTX Studio·high signal

Lightricks released LTX 2.3 in March 2026 — a 22B-parameter model (14B video + 5B audio) generating native 4K at 50fps with synchronized audio in a single forward pass using bidirectional cross-attention between both streams. The model is fully Apache 2.0, includes quantized variants that run on consumer GPUs, supports portrait/9:16 mode, and ships with a desktop video editor for full local inference. This is the first complete open-source audiovisual foundation model capable of this output quality at consumer hardware specs.