Stable Diffusion 3.5 Large on Apple M4 Pro (48GB)
M4 Pro (48GB) runs Stable Diffusion 3.5 Large at FP16 — ~20s first response. Usable on 48 GB VRAM — see full quantization options below.
Model Size
8.1B
Device VRAM
48 GB
Bandwidth
273 GB/s
Quantization
FP16
Performance by Quantization
OwnRig currently has one published compatibility entry for Stable Diffusion 3.5 Large on Apple M4 Pro (48GB) at FP16. This is the best supported pairing we can stand behind today.
| Quantization | Speed | TTFT | Fits in VRAM | Rating | Confidence |
|---|---|---|---|---|---|
| FP16 | – | 20000ms | ✓ Yes | Acceptable | estimated |
Notes
FP16
Same bandwidth as M4 Pro 24GB. FP16 fits with 35GB headroom. ~20s per image.
About Stable Diffusion 3.5 Large
Stable Diffusion 3.5 Large (8.1B) is a image gen model. Latest Stable Diffusion architecture with significantly improved prompt adherence, typography, and composition over SDXL. Higher VRAM requirement (12GB+ at FP16) but produces noticeably better images. The current standard for local image generation.
View all Stable Diffusion 3.5 Large hardware options →About Apple M4 Pro (48GB)
Apple M4 Pro (48GB) has 48 GB at 273 GB/s. Available in MacBook Pro 16-inch, Mac Mini.
See all models Apple M4 Pro (48GB) can run →Estimate method: MLX performance estimates based on device bandwidth. Reference hardware source: github.com (2026-03-15)
Performance varies by driver version, inference engine, quantization method, context length, and system configuration. Figures shown are estimates based on community benchmarks and may not reflect your exact setup. Product names are trademarks of their respective owners. OwnRig is independent and not affiliated with any hardware or AI model provider.