LTX-Video 13B (ltx-video family)
Parameters: 13 B (active:  B)
Mixture-of-experts: no
Release: 2025-05
Modality: video
Model license: LTX-Video Open Weights (OpenRAIL-M) (commercial use: yes)
License note: OpenRAIL-M open-weights license; commercial use permitted subject to use-based restrictions.
Architecture: dit (backbone 13 B)
Backbone size (GB by quant):
fp16: 28.6
fp8: 15.7
Additional components: name: T5-XXL text encoder
fp16_gb: 9.73
q4_gb: 2.9
offloaded: yes
VAE size: 0 GB
Default output: 1216×704, 161 frames (~5 s)
Recommended setup: gb: 20
quant: fp8
Memory without offload: 38 GB; offload floor: 12 GB
Device classes: mac, nvidia, amd
Tools: ComfyUI, Diffusers
Notes: The 13B LTX-Video tier with a two-stage low-res-then-upscale pipeline. Backbone bf16 is 28.6GB; the fp8 backbone (15.7GB) plus the upscaler and activations peaks around ~20GB at 1216x704 (third-party measured, synthesis). bf16 needs ~38GB+ (A6000/A100). OpenRAIL-M, commercial OK. Sources: Lightricks card, 13B distilled card, diffusers LTX docs.