facebook · First MLX build 24 Dec 2025 · In Core AI since 8 Jun 2026
sam3
MLXCore AI
Vision other
A 860M parameter segmentation model from facebook, with 9 MLX builds, from 4-bit to bf16 and Apple Core AI export recipes for iOS, macOS.
- Parameters
- 860M From Hugging Face
- Quantisation
- 8-bit sam3-8bit
- Memory needed
- 4 GB Estimate, unified memory
- Download
- 985 MB Weights, estimated
- Downloads
- 208 This build, last 30 days
- Task
- Segmentation Vision
- MLX builds
- 9 On mlx-community
- Devices
- Mac Apple silicon
- Parameters
- 860M From Hugging Face
- Compression
- — Apple’s preset
- Memory needed
- — Parameter count not published
- Context
- — Fixed at export
- Precision
- — Compute precision
- Platforms
- iOS, macOS Not stated
- Export presets
- 2 In Apple’s registry
- Listed by Apple
- 8 Jun 2026 First registry commit
Memory
Will it fit?Needs about 4 GB at 8-bit
8 GB
16 GB
24 GB
32 GB
64 GB
128 GB
Fits with headroomTight, close other appsWon’t fit
Estimated from the size of the weights, plus a fifth for context and working memory and 2 GB for macOS and your apps. Long contexts need more.
Run it
Terminal · Hugging Face CLI$ pip install -U huggingface_hub
$ hf download mlx-community/sam3-8bitMemory
There is no memory estimate: the parameter count for this model is not published on Hugging Face.
Export it
Terminal · uv$ git clone https://github.com/apple/coreai-models
$ cd coreai-models
$ uv run models/sam3/export.py
$ uv run models/sam3_video/export.py
Apple publishes the recipe, not a ready-made package: these commands convert the original weights to a Core AI .aimodel on your Mac. See the repository for requirements.
MLX builds
9 on mlx-community| sam3-4bit | 4-bit | 568 MB | 3 GB | 85 |
|---|---|---|---|---|
| sam3-mxfp4 | MXFP4 | 568 MB | 3 GB | 24 |
| sam3-nvfp4 | 4-bit | 568 MB | 3 GB | 22 |
| sam3-5bit | 5-bit | 672 MB | 3 GB | 32 |
| sam3-6bit | 6-bit | 777 MB | 3 GB | 27 |
| sam3-8bit | 8-bit | 985 MB | 4 GB | 208 |
| sam3-mxfp8 | MXFP8 | 985 MB | 4 GB | 34 |
| sam3-bf16 | bf16 | 1.7 GB | 4 GB | 152 |
| sam3-image | Unstated | 3.4 GB | 6 GB | 0 |
Sizes are estimated from Hugging Face’s parameter counts and the quantisation. Downloads are for the last 30 days.
Core AI export presets
From Apple’s registry| Preset | Platform | Compression | Precision | Context |
|---|---|---|---|---|
| sam3 | iOS, macOS | — | — | — |
| sam3-video | iOS, macOS | — | — | — |