Video model · ltx-video
LX LTX-Video 2B requirements
DIT video model · 2B params · 1216×704, 121f (~4s) · released Nov 2024. Realistic minimum to run: Nvidia GeForce RTX 3060 (12GB) at fp8 + offload.
OpenRAIL-M open-weights license; commercial use permitted subject to use-based restrictions.
Backbone size by precision
| Precision | Size |
|---|---|
| fp16 / bf16 | 6.34 GB |
| fp8 (recommended) | 4.46 GB |
| Q8 GGUF | 2.17 GB |
| Q4 GGUF | 1.42 GB |
Backbone weights only. Peak VRAM is dominated by the activation memory for 121 frames at 1216×704, not the file size.
Pipeline components
| Component | Size |
|---|---|
| T5-XXL text encoder offloaded | 2.9 GB |
Video VAEs are larger than image VAEs because they decode a temporal stack of frames.
Run it
LTX-Video 2B runs in ComfyUI or Diffusers. Generating more frames or higher resolution raises peak VRAM sharply; the fp8 + offload figure is for the default 121-frame clip.
Which devices can run LTX-Video 2B?
Apple Silicon Macs
- Apple M1 (8GB) No
- Apple M2 (16GB) Tight
- Apple M4 (16GB) Tight
- Apple M5 (16GB) Tight
- Apple M3 Pro (18GB) Yes
- Apple M4 (24GB) Yes
- Apple M4 Pro (24GB) Yes
- Apple M5 (32GB) Yes
- Apple M4 Pro (48GB) Yes
- Apple M5 Pro (48GB) Yes
- Apple M4 Max (64GB) Yes
- Apple M4 Max (128GB) Yes
- Apple M5 Max (128GB) Yes
- Apple M3 Ultra (256GB) Yes
RAM-only laptops
No mainstream local runtime for a 2B video model on RAM-only laptops yet.
iPhone & iPad
No mainstream local runtime for a 2B video model on iPhone & iPad yet.
Android
No mainstream local runtime for a 2B video model on Android yet.
NVIDIA GPUs
AMD GPUs
FAQ
How much VRAM does LTX-Video 2B need?
At fp8 + offload the realistic peak is ~10 GB, versus ~12 GB with every component resident. With aggressive CPU offload it drops to ~6 GB, much slower.
Why is peak VRAM lower than the sum of the files?
The text encoder is run once to encode your prompt, then offloaded to CPU before the frames are generated, so it is not resident at the memory peak.
Can I use LTX-Video 2B commercially?
Yes. LTX-Video 2B is licensed LTX-Video Open Weights (OpenRAIL-M), which permits commercial use.
Lightricks' fast DiT video model (2B), notable for near-real-time generation. The diffusers docs cite ~10GB VRAM with fp8 layerwise casting plus group offloading (the T5 encoder is offloaded). GGUF Q4_K_M (1.42GB backbone) + quantized T5 brings it to ~6GB. Generates 1216x704 at 30fps. OpenRAIL-M, commercial OK. Sources: Lightricks card, diffusers LTX docs, city96 GGUF.
Sources
VRAM is a sourced peak-usage anchor at fp8 + offload for the default clip length, validated 2026-06-15. See methodology.