video model · ltx-video · macOS
LX Can I run LTX-Video 13B on Apple M4 Max (128GB)?
Yes. LTX-Video 13B runs on Apple M4 Max (128GB) at fp8 (~20 GB of ~96 GB usable).
Runs at fp8 using ~20 GB of ~96 GB usable.
- Peak VRAM
- ~20 GB
- Usable on device
- ~96 GB
- Device memory
- 128 GB
- Quant
- fp8
How to run it
Use ComfyUI or Diffusers at fp8. The big text encoder is loaded to encode your prompt, then offloaded before generation, which is why peak VRAM stays near the backbone size rather than the sum of every file.
- Type
- video (DIT)
- Parameters
- 13B
- Peak VRAM
- ~20 GB at fp8
- Resolution
- 1216×704
- License
- LTX-Video Open Weights (OpenRAIL-M)
- Memory
- 128 GB unified
- Usable for weights
- ~96 GB
- Best runtime
- MLX direct / Ollama (MLX backend)
You could also run
Run LTX-Video 13B on other hardware
FAQ
Can Apple M4 Max (128GB) run LTX-Video 13B?
Yes. LTX-Video 13B runs on Apple M4 Max (128GB) at fp8 (~20 GB of ~96 GB usable).
How much VRAM does LTX-Video 13B need?
Apple M4 Max (128GB) has room to spare. At fp8 the realistic peak is ~20 GB of VRAM, versus ~38 GB with every component kept resident (no offload). With aggressive CPU offload it drops to ~12 GB, much slower.
What do I use to run LTX-Video 13B locally?
LTX-Video 13B runs in ComfyUI or Diffusers. It loads as a video diffusion checkpoint plus its text encoder and VAE, not a single chat command.
Sources
VRAM figures are sourced peak-usage anchors at the noted quant, validated 2026-06-15. See methodology.