ultralytics

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Ultralytics creates cutting-edge, state-of-the-art (SOTA) YOLO models built on years of foundational research in computer vision and AI. Constantly updated for performance and flexibility, our models are fast, accurate, and easy to use. They excel at object detection, tracking, instance segmentation, image classification, and pose estimation tasks.

Find detailed documentation in the Ultralytics Docs. Get support via GitHub Issues. Join discussions on Discord, Reddit, and the Ultralytics Community Forums!

Request an Enterprise License for commercial use at Ultralytics Licensing.

📄 Documentation

See below for quickstart installation and usage examples. For comprehensive guidance on training, validation, prediction, and deployment, refer to our full Ultralytics Docs.

Install

Install the ultralytics package, including all requirements, in a Python>=3.8 environment with PyTorch>=1.8.

pip install ultralytics

For alternative installation methods, including Conda, Docker, and building from source via Git, please consult the Quickstart Guide.

Usage

CLI

You can use Ultralytics YOLO directly from the Command Line Interface (CLI) with the yolo command:

# Predict using a pretrained YOLO model (e.g., YOLO11n) on an image
yolo predict model=yolo11n.pt source='https://ultralytics.com/images/bus.jpg'

The yolo command supports various tasks and modes, accepting additional arguments like imgsz=640. Explore the YOLO CLI Docs for more examples.

Python

Ultralytics YOLO can also be integrated directly into your Python projects. It accepts the same configuration arguments as the CLI:

from ultralytics import YOLO

# Load a pretrained YOLO11n model
model = YOLO("yolo11n.pt")

# Train the model on the COCO8 dataset for 100 epochs
train_results = model.train(
    data="coco8.yaml",  # Path to dataset configuration file
    epochs=100,  # Number of training epochs
    imgsz=640,  # Image size for training
    device="cpu",  # Device to run on (e.g., 'cpu', 0, [0,1,2,3])
)

# Evaluate the model's performance on the validation set
metrics = model.val()

# Perform object detection on an image
results = model("path/to/image.jpg")  # Predict on an image
results[0].show()  # Display results

# Export the model to ONNX format for deployment
path = model.export(format="onnx")  # Returns the path to the exported model

Discover more examples in the YOLO Python Docs.

✨ Models

Ultralytics supports a wide range of YOLO models, from early versions like YOLOv3 to the latest YOLO11. The tables below showcase YOLO11 models pretrained on the COCO dataset for Detection, Segmentation, and Pose Estimation. Additionally, Classification models pretrained on the ImageNet dataset are available. Tracking mode is compatible with all Detection, Segmentation, and Pose models. All Models are automatically downloaded from the latest Ultralytics release upon first use.

Detection (COCO)

Explore the Detection Docs for usage examples. These models are trained on the COCO dataset, featuring 80 object classes.

Model	size (pixels)	mAPval 50-95	Speed CPU ONNX (ms)	Speed T4 TensorRT10 (ms)	params (M)	FLOPs (B)
YOLO11n	640	39.5	56.1 ± 0.8	1.5 ± 0.0	2.6	6.5
YOLO11s	640	47.0	90.0 ± 1.2	2.5 ± 0.0	9.4	21.5
YOLO11m	640	51.5	183.2 ± 2.0	4.7 ± 0.1	20.1	68.0
YOLO11l	640	53.4	238.6 ± 1.4	6.2 ± 0.1	25.3	86.9
YOLO11x	640	54.7	462.8 ± 6.7	11.3 ± 0.2	56.9	194.9

• mAP^val values refer to single-model single-scale performance on the COCO val2017 dataset. See YOLO Performance Metrics for details.
  Reproduce with yolo val detect data=coco.yaml device=0
• Speed metrics are averaged over COCO val images using an Amazon EC2 P4d instance. CPU speeds measured with ONNX export. GPU speeds measured with TensorRT export.
  Reproduce with yolo val detect data=coco.yaml batch=1 device=0|cpu

Segmentation (COCO)

Refer to the Segmentation Docs for usage examples. These models are trained on COCO-Seg, including 80 classes.

Model	size (pixels)	mAPbox 50-95	mAPmask 50-95	Speed CPU ONNX (ms)	Speed T4 TensorRT10 (ms)	params (M)	FLOPs (B)
YOLO11n-seg	640	38.9	32.0	65.9 ± 1.1	1.8 ± 0.0	2.9	10.4
YOLO11s-seg	640	46.6	37.8	117.6 ± 4.9	2.9 ± 0.0	10.1	35.5
YOLO11m-seg	640	51.5	41.5	281.6 ± 1.2	6.3 ± 0.1	22.4	123.3
YOLO11l-seg	640	53.4	42.9	344.2 ± 3.2	7.8 ± 0.2	27.6	142.2
YOLO11x-seg	640	54.7	43.8	664.5 ± 3.2	15.8 ± 0.7	62.1	319.0

• mAP^val values are for single-model single-scale on the COCO val2017 dataset. See YOLO Performance Metrics for details.
  Reproduce with yolo val segment data=coco.yaml device=0
• Speed metrics are averaged over COCO val images using an Amazon EC2 P4d instance. CPU speeds measured with ONNX export. GPU speeds measured with TensorRT export.
  Reproduce with yolo val segment data=coco.yaml batch=1 device=0|cpu

Classification (ImageNet)

Consult the Classification Docs for usage examples. These models are trained on ImageNet, covering 1000 classes.

Model	size (pixels)	acc top1	acc top5	Speed CPU ONNX (ms)	Speed T4 TensorRT10 (ms)	params (M)	FLOPs (B) at 224
YOLO11n-cls	224	70.0	89.4	5.0 ± 0.3	1.1 ± 0.0	1.6	0.5
YOLO11s-cls	224	75.4	92.7	7.9 ± 0.2	1.3 ± 0.0	5.5	1.6
YOLO11m-cls	224	77.3	93.9	17.2 ± 0.4	2.0 ± 0.0	10.4	5.0
YOLO11l-cls	224	78.3	94.3	23.2 ± 0.3	2.8 ± 0.0	12.9	6.2
YOLO11x-cls	224	79.5	94.9	41.4 ± 0.9	3.8 ± 0.0	28.4	13.7

• acc values represent model accuracy on the ImageNet dataset validation set.
  Reproduce with yolo val classify data=path/to/ImageNet device=0
• Speed metrics are averaged over ImageNet val images using an Amazon EC2 P4d instance. CPU speeds measured with ONNX export. GPU speeds measured with TensorRT export.
  Reproduce with yolo val classify data=path/to/ImageNet batch=1 device=0|cpu

Pose (COCO)

See the Pose Estimation Docs for usage examples. These models are trained on COCO-Pose, focusing on the 'person' class.

Model	size (pixels)	mAPpose 50-95	mAPpose 50	Speed CPU ONNX (ms)	Speed T4 TensorRT10 (ms)	params (M)	FLOPs (B)
YOLO11n-pose	640	50.0	81.0	52.4 ± 0.5	1.7 ± 0.0	2.9	7.6
YOLO11s-pose	640	58.9	86.3	90.5 ± 0.6	2.6 ± 0.0	9.9	23.2
YOLO11m-pose	640	64.9	89.4	187.3 ± 0.8	4.9 ± 0.1	20.9	71.7
YOLO11l-pose	640	66.1	89.9	247.7 ± 1.1	6.4 ± 0.1	26.2	90.7
YOLO11x-pose	640	69.5	91.1	488.0 ± 13.9	12.1 ± 0.2	58.8	203.3

• mAP^val values are for single-model single-scale on the COCO Keypoints val2017 dataset. See YOLO Performance Metrics for details.
  Reproduce with yolo val pose data=coco-pose.yaml device=0
• Speed metrics are averaged over COCO val images using an Amazon EC2 P4d instance. CPU speeds measured with ONNX export. GPU speeds measured with TensorRT export.
  Reproduce with yolo val pose data=coco-pose.yaml batch=1 device=0|cpu

Oriented Bounding Boxes (DOTAv1)

Check the OBB Docs for usage examples. These models are trained on DOTAv1, including 15 classes.

Model	size (pixels)	mAPtest 50	Speed CPU ONNX (ms)	Speed T4 TensorRT10 (ms)	params (M)	FLOPs (B)
YOLO11n-obb	1024	78.4	117.6 ± 0.8	4.4 ± 0.0	2.7	17.2
YOLO11s-obb	1024	79.5	219.4 ± 4.0	5.1 ± 0.0	9.7	57.5
YOLO11m-obb	1024	80.9	562.8 ± 2.9	10.1 ± 0.4	20.9	183.5
YOLO11l-obb	1024	81.0	712.5 ± 5.0	13.5 ± 0.6	26.2	232.0
YOLO11x-obb	1024	81.3	1408.6 ± 7.7	28.6 ± 1.0	58.8	520.2

• mAP^test values are for single-model multiscale performance on the DOTAv1 test set.
  Reproduce by yolo val obb data=DOTAv1.yaml device=0 split=test and submit merged results to the DOTA evaluation server.
• Speed metrics are averaged over DOTAv1 val images using an Amazon EC2 P4d instance. CPU speeds measured with ONNX export. GPU speeds measured with TensorRT export.
  Reproduce by yolo val obb data=DOTAv1.yaml batch=1 device=0|cpu

🧩 Integrations

Our key integrations with leading AI platforms extend the functionality of Ultralytics' offerings, enhancing tasks like dataset labeling, training, visualization, and model management. Discover how Ultralytics, in collaboration with partners like Weights & Biases, Comet ML, Roboflow, and Intel OpenVINO, can optimize your AI workflow. Explore more at Ultralytics Integrations.

Ultralytics HUB 🌟	Weights & Biases	Comet	Neural Magic
Streamline YOLO workflows: Label, train, and deploy effortlessly with Ultralytics HUB. Try now!	Track experiments, hyperparameters, and results with Weights & Biases.	Free forever, Comet ML lets you save YOLO models, resume training, and interactively visualize predictions.	Run YOLO inference up to 6x faster with Neural Magic DeepSparse.

🌟 Ultralytics HUB

Experience seamless AI with Ultralytics HUB, the all-in-one platform for data visualization, training YOLO models, and deployment—no coding required. Transform images into actionable insights and bring your AI visions to life effortlessly using our cutting-edge platform and user-friendly Ultralytics App. Start your journey for Free today!

🤝 Contribute

We thrive on community collaboration! Ultralytics YOLO wouldn't be the SOTA framework it is without contributions from developers like you. Please see our Contributing Guide to get started. We also welcome your feedback—share your experience by completing our Survey. A huge Thank You 🙏 to everyone who contributes!

We look forward to your contributions to help make the Ultralytics ecosystem even better!

📜 License

Ultralytics offers two licensing options to suit different needs:

• AGPL-3.0 License: This OSI-approved open-source license is perfect for students, researchers, and enthusiasts. It encourages open collaboration and knowledge sharing. See the LICENSE file for full details.
• Ultralytics Enterprise License: Designed for commercial use, this license allows for the seamless integration of Ultralytics software and AI models into commercial products and services, bypassing the open-source requirements of AGPL-3.0. If your use case involves commercial deployment, please contact us via Ultralytics Licensing.

📞 Contact

For bug reports and feature requests related to Ultralytics software, please visit GitHub Issues. For questions, discussions, and community support, join our active communities on Discord, Reddit, and the Ultralytics Community Forums. We're here to help with all things Ultralytics!