facebookresearch/sam3

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The repository provides code for running inference and finetuning with the Meta Segment Anything Model 3 (SAM 3), links for downloading the trained model checkpoints, and example notebooks that show how to use the model.

Stars: 11.7k
Forks: 1.8k
Open beginner issues: 6
Indexed issues: 271

Dominant language: Python
License: No license data
Last GitHub push: Sep 18, 2026
Latest indexed: Sep 15, 2026
Contributing guide: Contributing guide
Code of conduct: Code of conduct
Beginner labels: No beginner labels indexed
PR merge metrics: No merged PRs in 30d

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271 open issues indexed

Request to reset rejected Hugging Face access for SAM3 Open

Difficulty 5/5 Over a week Newbie friendliness 15/100

facebookresearch/sam3#624 · Opened Sep 20, 2026
Verify evals on Papers with Code Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

facebookresearch/sam3#622 · Opened Sep 14, 2026
Follow-up: Rejected access request for SAM3 checkpoints | HF username: xiaohu9 Open

Difficulty 5/5 Over a week Newbie friendliness 10/100

facebookresearch/sam3#621 · 1 comment · Opened Sep 12, 2026
Question about the release timeline and scope of the SA-Co training datasets Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

facebookresearch/sam3#619 · Opened Sep 8, 2026
[SAM 3.1 Multiplex] Explicit forward tracking bound can enter an empty grounding chunk Open

Difficulty 4/5 3-5 days Newbie friendliness 68/100

facebookresearch/sam3#618 · Opened Sep 8, 2026
Request to reset rejected Hugging Face access for SAM3 Open

Difficulty 5/5 Over a week Newbie friendliness 15/100

facebookresearch/sam3#617 · 2 comments · Opened Sep 2, 2026
Pending Hugging Face Access Request for SAM 3 – Kasimyildirim Open

Difficulty 5/5 Over a week Newbie friendliness 10/100

facebookresearch/sam3#616 · Opened Aug 31, 2026
SAM3.1 Tracker Propagation Failure Open

Difficulty 3/5 1-2 days Newbie friendliness 48/100

facebookresearch/sam3#612 · Opened Aug 3, 2026
Question about reproducing semantic‑segmentation mIoU in SAM‑3 Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

facebookresearch/sam3#611 · Opened Jul 30, 2026
SAM3 → ONNX → Triton Inference Server: full image-model deployment (text, box + cross-crop exemplars, interactive PVS) Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

facebookresearch/sam3#609 · 1 comment · Opened Jul 21, 2026
`build_sam3_image_model(checkpoint_path=...)` can silently load nothing for fine-tuned checkpoints Open

Difficulty 3/5 1-2 days Newbie friendliness 72/100

facebookresearch/sam3#606 · Opened Jul 8, 2026
SAM3 mask exemplars: claimed in the paper, unusable in the release Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

facebookresearch/sam3#604 · 3 comments · 2 reactions · Opened Jul 5, 2026
How I can run this on mac No module named 'triton' Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

facebookresearch/sam3#597 · 1 comment · Opened Jun 26, 2026
Is CUDA 12.8 a hard requirement, or just the dev environment default? Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

facebookresearch/sam3#596 · 4 reactions · Opened Jun 23, 2026
In the same scenario, most of the reasoning can be correct, while a small portion yields no result. Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

facebookresearch/sam3#594 · 3 comments · Opened Jun 22, 2026
SAM3 Create 3D Bodies has a bug Open

Difficulty 4/5 3-5 days Newbie friendliness 38/100

facebookresearch/sam3#591 · Opened Jun 20, 2026
An error occurs in CPU-only environment due to hardcoded 'cuda' device Open

Difficulty 2/5 1-3 hours Newbie friendliness 82/100

facebookresearch/sam3#587 · Opened Jun 19, 2026
Cool trick. Open

Difficulty 5/5 Over a week Newbie friendliness 15/100

facebookresearch/sam3#586 · 1 reaction · Opened Jun 16, 2026
[SA-Co eval Bug?] Custom CGF1 evaluator penalizes predictions overlapping with crowd annotations (iscrowd=1) Open

Difficulty 3/5 1-2 days Newbie friendliness 68/100

facebookresearch/sam3#585 · Opened Jun 12, 2026
Any ideas on how to segment moving vehicles as separate class? Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

facebookresearch/sam3#584 · Opened Jun 11, 2026
image to 3d not convert please fix this issue Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

facebookresearch/sam3#583 · Opened Jun 11, 2026
Potential workaround for SAM3.1 checkpoint downloads hanging indefinitely Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

facebookresearch/sam3#582 · Opened Jun 10, 2026
SAM3 in Deepstream Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

facebookresearch/sam3#581 · Opened Jun 9, 2026
anyone successfully fine-tuned sam3 on a custom dataset? Open

Difficulty 5/5 Over a week Newbie friendliness 20/100

facebookresearch/sam3#580 · 2 reactions · Opened Jun 9, 2026
Would SA-CO/VIDEO dataset be released? Open

Difficulty 5/5 Over a week Newbie friendliness 15/100

facebookresearch/sam3#579 · Opened Jun 9, 2026
usage example for segmenting lidar Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

facebookresearch/sam3#578 · Opened Jun 8, 2026
ValueError when running sam3_image_interactive.ipynb Open

Difficulty 3/5 1-2 days Newbie friendliness 52/100

facebookresearch/sam3#577 · 1 comment · Opened Jun 6, 2026
Reduced Triton sigmoid focal loss returns NaN gradients for gamma=0 when logits saturate Open

Difficulty 3/5 1-2 days Newbie friendliness 65/100

facebookresearch/sam3#575 · Opened Jun 5, 2026
About the prompt used in the code Open

Difficulty 5/5 Over a week Newbie friendliness 30/100

facebookresearch/sam3#574 · Opened Jun 4, 2026
Multiplex video tracker: removing a shared-conditioning-frame "owner" wipes other objects' memory → No points are provided Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

facebookresearch/sam3#572 · Opened Jun 3, 2026
The example at examples/sam3_image_predictor_example.ipynb yields "An error occurred" Open

Difficulty 2/5 1-3 hours Newbie friendliness 68/100

facebookresearch/sam3#568 · Opened Jun 1, 2026
Usage of visual_prompt_embed Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

facebookresearch/sam3#567 · 1 reaction · Opened May 31, 2026
Question Regarding the Use of Medical Imaging Data in SAM3 Training Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

facebookresearch/sam3#566 · Opened May 31, 2026
Discussion: RankSEG as metric-aware post-processing for SAM-family masks Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

facebookresearch/sam3#561 · 4 reactions · Opened May 25, 2026
train with noun_phrase Open

Difficulty 4/5 3-5 days Newbie friendliness 42/100

facebookresearch/sam3#559 · Opened May 25, 2026
how to use 'save_best_meters' in config yaml Open

Difficulty 3/5 1-2 days Newbie friendliness 38/100

facebookresearch/sam3#556 · Opened May 22, 2026
Does SAM 3.1 support SAM 1’s interactive image segmentation task (point/box-based)? Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

facebookresearch/sam3#555 · Opened May 21, 2026
For anyone struggling with v3.1 Open

Difficulty 5/5 Over a week Newbie friendliness 20/100

facebookresearch/sam3#554 · 2 comments · 4 reactions · Opened May 20, 2026
Non-gated SAM3.1 by Comfy is available? Open

Difficulty 1/5 Under an hour Newbie friendliness 25/100

facebookresearch/sam3#551 · Opened May 19, 2026
Hardcoded "cuda" in TransformerDecoderLayer __init__ Open

Difficulty 2/5 1-3 hours Newbie friendliness 76/100

facebookresearch/sam3#550 · Opened May 17, 2026
For a single image, 3.1 can multiple prompt words be processed at once Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

facebookresearch/sam3#545 · 1 comment · Opened May 9, 2026
Bug: `start_session()` raises `TypeError` with multiplex predictor (SAM 3.1) Open

Difficulty 1/5 Under an hour Newbie friendliness 25/100

facebookresearch/sam3#544 · 12 reactions · Opened May 8, 2026
The recognition effect based on text_prompt is poor Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

facebookresearch/sam3#535 · Opened Apr 27, 2026
SAM3.1. size assert error during compile Open

Difficulty 4/5 3-5 days Newbie friendliness 48/100

facebookresearch/sam3#534 · 1 comment · Opened Apr 25, 2026
SAM3.1 multiplex propagation fails on Windows RTX 5080 with “No available kernel” Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

facebookresearch/sam3#532 · Opened Apr 24, 2026
recondition_masklets` encoded memory is overwritten by `_tracker_update_memories Open

Difficulty 3/5 1-2 days Newbie friendliness 64/100

facebookresearch/sam3#531 · Opened Apr 24, 2026
Solution to "torch.utils.checkpoint.CheckpointError" Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

facebookresearch/sam3#530 · Opened Apr 24, 2026
Abnormal floating masks when using SAM 3.1 for MOT, leading to oversized bounding boxes Open

Difficulty 4/5 3-5 days Newbie friendliness 42/100

facebookresearch/sam3#528 · 2 comments · 1 reaction · Opened Apr 22, 2026
`sam3.1_multiplex.pt` has zero `build_*` path that loads cleanly on public `main` (2026-04-20 install) Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

facebookresearch/sam3#526 · 1 comment · Opened Apr 20, 2026
decoder.py forces exclusive SDPBackend.FLASH_ATTENTION, crashes on platforms without Flash Attention Open

Difficulty 2/5 1-3 hours Newbie friendliness 82/100

facebookresearch/sam3#523 · Opened Apr 16, 2026

facebookresearch/sam3

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