// LTX Video · Video generation
LTX-2: VRAM & local deployment
18.9B parameters. About 13.1 GB at 4-bit and 42.0 GB at BF16.
released 2026-01-03licence: Custom licence – read itmemory figures are estimates
01Specs
| Publisher | Lightricks · Lightricks |
|---|---|
| Family / series | LTX Video · LTX-2 |
| Type | Video generation (image-to-video) |
| Parameters | 18.9B Source: counted from official safetensors weights |
| Released weights | BF16 · 170 GBdownload |
| Licence | ltx-2-community-license-agreement · Custom licence – read itThe publisher uses its own licence; we have not classified it. Read the licence text. |
| Released | 2026-01-03 (Hugging Face repo created) |
02How much VRAM it needs (estimate)
Video models: memory grows with resolution and clip length; official repos usually list a tested GPU in the card. Weights below are the main model only.
| Precision | Weights | Weights + overhead | Smallest GPU | Mac |
|---|---|---|---|---|
| BF16 / FP16 (original) | 37.8 GB | 42.0 GB | 2 × RTX 5090 (64GB) | Mac 64GB |
| FP8 / INT8 / Q8_0 | 20.1 GB | 22.6 GB | RTX 5090 32GB | Mac 64GB |
| 4-bit (Q4_K_M / AWQ / GPTQ-Int4) | 11.4 GB | 13.1 GB | 16GB GPU | Mac 24GB |
Bits per weight: BF16 16, FP8 8.5, 4-bit 4.85. “Fits” = total ≤ 90% of memory; Mac GPU can use ~2/3 of unified memory (≤36GB) or ~3/4 (larger). For MoE, all experts must be in memory, so size by total parameters. Method →
03How to run it
Only runtimes the publisher or the runtime’s official library names for this model.
- Diffusers — mentioned in the official model card
- ComfyUI — mentioned in the official model card
04Official repositories & quantised builds
1 official repo(s) from Lightricks.
- LTX-2 main
05Other LTX Video models
All 8 →| Model | Params | 4-bit total | Released |
|---|---|---|---|
| LTX-2.5 | — | — | 2026-07-23 |
| LTX-2.3 | — | — | 2026-03-04 |
| LTX-Video-0.9.8-13B-distilled | 13B | 9.2 GB | 2025-07-17 |
| LTX-Video-0.9.7-distilled | 13B | 9.2 GB | 2025-05-14 |
| LTX-Video-0.9.7-dev | 13B | 9.2 GB | 2025-05-13 |
| LTX-Video-0.9.5 | 1.92B | 1.8 GB | 2025-03-16 |
| LTX-Video | 1.92B | 1.8 GB | 2024-10-31 |
06Sources
Data checked 2026-10-22. Parameters, context and licence are copied from the official repository; memory figures are our estimates.