LibreAI / Image / SAM 2
// image · facebookresearch/sam2

SAM 2

SAM 2 is an open-source image project by facebookresearch (facebookresearch/sam2 on GitHub). It has 20,061 GitHub stars and 2,581 forks, is released under the Apache-2.0 license, and was last updated on GitHub on 30 May 2026.

SAM 2 — Meta's Segment Anything Model 2: promptable segmentation for images and video, Apache-2.0

★ 20.1k stars⑂ 2.6k forksApache-2.0updated 2026-05
▦ visual — this project's README ships no embeddable screenshot,
so here's a placeholder. The guide below is complete regardless.
// project facts

Project facts

GitHub stars
20,061
Forks
2,581
License
Apache-2.0
Last updated on GitHub
30 May 2026
Category
Image
Listing
Full install guide
// how it works

How it works

  1. Install PyTorch and TorchVision first

    SAM 2 needs Python 3.10+, torch 2.5.1+ and torchvision 0.20.1+ — install those from the PyTorch site before anything else.

  2. Clone and install SAM 2

    Clone the repo and install it in editable mode; add the notebooks extra for the example notebooks.

  3. Download checkpoints and segment

    Download a SAM 2 checkpoint, then run image or video prediction with the predictor from the example notebooks.

// features

Why people love it

Promptable segmentation

Point, box or mask prompts select exactly the object you mean — no training on your subject required.

Images and video

The step beyond SAM 1: the same model tracks a segmented object across video frames.

Example notebooks included

Image prediction and video prediction notebooks show the full workflow, with jupyter and matplotlib as the only extras.

A foundation for editing tools

Segmentation masks feed background removal, object cut-out, inpainting and video effects pipelines.

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// run it

Run it yourself

  1. Install

    The README install route: clone, then editable install.

    git clone https://github.com/facebookresearch/sam2.git && cd sam2
    pip install -e .
  2. Add the notebooks

    Required for the example notebooks (jupyter and matplotlib).

    pip install -e ".[notebooks]"
  3. Download checkpoints

    Checkpoints are separate from the code — download them per the README Getting Started section, then run image or video prediction.

    https://github.com/facebookresearch/sam2#getting-started
// use cases

What you can build

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// faq

Questions, answered

Who makes SAM 2?

Meta's Facebook Research team, as the successor to the Segment Anything Model.

Is SAM 2 free?

Yes — Apache-2.0 licensed code; checkpoints carry their own licence terms.

How is SAM 2 different from SAM 1?

SAM 2 adds video: it segments and tracks objects across frames, where SAM 1 handled single images.

Do I need a GPU?

For practical use, yes — the install compiles a custom CUDA kernel, and the README recommends a GPU machine (WSL on Windows).

How do I get started?

Install PyTorch 2.5.1+ and TorchVision, clone and pip install -e ., download a checkpoint, and follow the image or video prediction notebooks.

// keep exploring

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Get SAM 2

Free and open — grab the source, star the repo, and start creating.