| --- |
| license: other |
| license_name: sam-license |
| license_link: LICENSE |
| pipeline_tag: mask-generation |
| tags: |
| - sam3 |
| - image-segmentation |
| - mirror |
| library_name: sam3 |
| --- |
| |
| # SAM 3 — unofficial checkpoint mirror |
|
|
| This repository mirrors Meta's unmodified SAM 3 `sam3.pt` checkpoint for local |
| image-segmentation inference. It is maintained by `squarefk`, not by Meta, and |
| is not an official release or endorsement. The original authors retain their |
| rights. This mirror does not relicense the model. |
|
|
| ## Provenance |
|
|
| Recorded on 2026-10-14; this is a pinned snapshot, not a claim of the latest release. |
|
|
| | Field | Value | |
| | --- | --- | |
| | Original model | [facebook/sam3](https://huggingface.co/facebook/sam3) | |
| | Original weights revision | [3c879f39826c281e95690f02c7821c4de09afae7](https://huggingface.co/facebook/sam3/blob/3c879f39826c281e95690f02c7821c4de09afae7/sam3.pt) | |
| | File | `sam3.pt` | |
| | Size | 3,450,062,241 bytes | |
| | SHA-256 | `9999e2341ceef5e136daa386eecb55cb414446a00ac2b55eb2dfd2f7c3cf8c9e` | |
| | Tested upstream source | [660a5e9e1b8b4c02c0ad97229b88a09a6e4ff5b7](https://github.com/facebookresearch/sam3/tree/660a5e9e1b8b4c02c0ad97229b88a09a6e4ff5b7) | |
| | Modifications to weights | None | |
|
|
| ## License and permitted use |
|
|
| The weights remain governed by the complete [SAM License](LICENSE), last updated |
| November 19, 2025. Section 1(a) grants redistribution rights; section 1(b)(i) |
| requires redistribution under that agreement with a copy of it. This repository |
| includes the unmodified agreement. It is not an MIT or Apache-2.0 relicense. |
|
|
| All original terms apply, including research attribution, privacy, trade controls, |
| and prohibited uses. Do not use the model for the military, warfare, espionage, |
| weapons or other prohibited end uses specified in section 1(b)(v). Public access |
| does not remove these restrictions. Review the full license before use or further |
| redistribution. Model functionality is image segmentation, not image generation. |
|
|
| ## Usage and updates |
|
|
| Use the checkpoint with the [upstream SAM 3 code](https://github.com/facebookresearch/sam3) |
| and its image processor. The `.pt` file is the original upstream PyTorch checkpoint, |
| not a Transformers `save_pretrained` directory. Do not assume the Hub's generic |
| Transformers examples apply to this file. |
|
|
| For newer releases, check the [upstream announcements](https://github.com/facebookresearch/sam3#latest-updates) |
| and [weight history](https://huggingface.co/facebook/sam3/commits/main). Compare |
| weight hashes as well as source revisions. This mirror does not update automatically. |
|
|
