video model · ltx-video · macOS

Can I run LTX-Video 13B on Apple M3 Pro (18GB)?

Compatibility verdict VRAM check

No, not enough memory would not load

Needs ~20 GB at fp8, but only ~12 GB is usable on Apple M3 Pro (18GB). With aggressive CPU offload it can run on as little as ~12 GB, much slower.

Needs ~20 GB Device usable ~12 GB

Needs ~20 GB at fp8, but only ~12 GB is usable on Apple M3 Pro (18GB). With aggressive CPU offload it can run on as little as ~12 GB, much slower.

The gap is about 8 GB: LTX-Video 13B needs roughly 20 GB and Apple M3 Pro (18GB) leaves only about 12 GB usable for a model. The lightest tracked hardware that runs LTX-Video 13B is the Nvidia GeForce RTX 4090 (24GB) at 24 GB. See LTX-Video 13B on Nvidia GeForce RTX 4090 (24GB).

Peak VRAM: ~20 GB
Usable on device: ~12 GB
Device memory: 18 GB
Quant: fp8

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Model ltx-video

Type: video (DIT)
Parameters: 13B
Peak VRAM: ~20 GB at fp8
Resolution: 1216×704
License: LTX-Video Open Weights (OpenRAIL-M)

Full LTX-Video 13B requirements →

Device macOS

Memory: 18 GB unified
Usable for weights: ~12 GB
Power draw: ~70 W
Best runtime: Ollama (llama.cpp Metal backend) / MLX

Best models for Apple M3 Pro (18GB) →

What you can run instead

Run LTX-Video 13B on other hardware

Nvidia GeForce RTX 4090 (24GB)Nvidia GeForce RTX 3090 (24GB)AMD Radeon RX 7900 XTX (24GB)Nvidia GeForce RTX 5090 (32GB)Apple M5 (32GB)Apple M4 Pro (48GB)

FAQ

Can Apple M3 Pro (18GB) run LTX-Video 13B?

Needs ~20 GB at fp8, but only ~12 GB is usable on Apple M3 Pro (18GB). With aggressive CPU offload it can run on as little as ~12 GB, much slower.

How much VRAM does LTX-Video 13B need?

Apple M3 Pro (18GB) does not have enough memory. 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 2026-08-03. See methodology.