---
description: Discover detailed instructions for building various Segment Anything Model 2 (SAM 2) architectures with Ultralytics.
keywords: Ultralytics, SAM 2 model, Segment Anything Model 2, SAM, model building, deep learning, AI
---

# Reference for `ultralytics/models/sam2/build.py`

!!! Note

    This file is available at [https://github.com/ultralytics/ultralytics/blob/main/ultralytics/models/sam2/build.py](https://github.com/ultralytics/ultralytics/blob/main/ultralytics/models/sam2/build.py). If you spot a problem please help fix it by [contributing](https://docs.ultralytics.com/help/contributing/) a [Pull Request](https://github.com/ultralytics/ultralytics/edit/main/ultralytics/models/sam2/build.py) 🛠️. Thank you 🙏!

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## ::: ultralytics.models.sam2.build.build_sam2_t

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## ::: ultralytics.models.sam2.build.build_sam2_s

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## ::: ultralytics.models.sam2.build.build_sam2_b

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## ::: ultralytics.models.sam2.build.build_sam2_l

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## ::: ultralytics.models.sam2.build._build_sam2

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## ::: ultralytics.models.sam2.build.build_sam2

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