infamix / yolov5

YOLOv5 πŸš€ in PyTorch > ONNX > CoreML > TFLite

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YOLOv5 πŸš€ is a family of object detection architectures and models pretrained on the COCO dataset, and represents Ultralytics open-source research into future vision AI methods, incorporating lessons learned and best practices evolved over thousands of hours of research and development.


See the YOLOv5 Docs for full documentation on training, testing and deployment.

Quick Start Examples


Python>=3.6.0 is required with all requirements.txt installed including PyTorch>=1.7:

$ git clone
$ cd yolov5
$ pip install -r requirements.txt

Inference with YOLOv5 and PyTorch Hub. Models automatically download from the latest YOLOv5 release.

import torch

# Model
model = torch.hub.load('ultralytics/yolov5', 'yolov5s')  # or yolov5m, yolov5l, yolov5x, custom

# Images
img = ''  # or file, Path, PIL, OpenCV, numpy, list

# Inference
results = model(img)

# Results
results.print()  # or .show(), .save(), .crop(), .pandas(), etc.
Inference with runs inference on a variety of sources, downloading models automatically from the latest YOLOv5 release and saving results to runs/detect.

$ python --source 0  # webcam
                            file.jpg  # image 
                            file.mp4  # video
                            path/  # directory
                            path/*.jpg  # glob
                            ''  # YouTube
                            'rtsp://'  # RTSP, RTMP, HTTP stream

Run commands below to reproduce results on COCO dataset (dataset auto-downloads on first use). Training times for YOLOv5s/m/l/x are 2/4/6/8 days on a single V100 (multi-GPU times faster). Use the largest --batch-size your GPU allows (batch sizes shown for 16 GB devices).

$ python --data coco.yaml --cfg yolov5s.yaml --weights '' --batch-size 64
                                         yolov5m                                40
                                         yolov5l                                24
                                         yolov5x                                16


Get started in seconds with our verified environments. Click each icon below for details.


Weights and Biases Roboflow - ⭐ NEW
Automatically track and visualize all your YOLOv5 training runs in the cloud with Weights & Biases Label and automatically export your custom datasets directly to YOLOv5 for training with Roboflow

Why YOLOv5

YOLOv5-P5 640 Figure (click to expand)

Figure Notes (click to expand)
  • GPU Speed measures end-to-end time per image averaged over 5000 COCO val2017 images using a V100 GPU with batch size 32, and includes image preprocessing, PyTorch FP16 inference, postprocessing and NMS.
  • EfficientDet data from google/automl at batch size 8.
  • Reproduce by python --task study --data coco.yaml --iou 0.7 --weights

Pretrained Checkpoints

Model size
V100 (ms)
640 (B)
YOLOv5s 640 36.7 36.7 55.4 2.0 7.3 17.0
YOLOv5m 640 44.5 44.5 63.1 2.7 21.4 51.3
YOLOv5l 640 48.2 48.2 66.9 3.8 47.0 115.4
YOLOv5x 640 50.4 50.4 68.8 6.1 87.7 218.8
YOLOv5s6 1280 43.3 43.3 61.9 4.3 12.7 17.4
YOLOv5m6 1280 50.5 50.5 68.7 8.4 35.9 52.4
YOLOv5l6 1280 53.4 53.4 71.1 12.3 77.2 117.7
YOLOv5x6 1280 54.4 54.4 72.0 22.4 141.8 222.9
YOLOv5x6 TTA 1280 55.0 55.0 72.0 70.8 - -
Table Notes (click to expand)
  • All checkpoints are trained to 300 epochs with default settings and hyperparameters.
  • APtest denotes COCO test-dev2017 server results, all other AP results denote val2017 accuracy.
  • mAP values are for single-model single-scale unless otherwise noted.
    Reproduce by python --data coco.yaml --img 640 --conf 0.001 --iou 0.65
  • Speed averaged over 5000 COCO val2017 images using a GCP n1-standard-16 V100 instance, and includes FP16 inference, postprocessing and NMS.
    Reproduce by python --data coco.yaml --img 640 --conf 0.25 --iou 0.45 --half
  • TTA Test Time Augmentation includes reflection and scale.
    Reproduce by python --data coco.yaml --img 1536 --iou 0.7 --augment


We love your input! We want to make contributing to YOLOv5 as easy and transparent as possible. Please see our Contributing Guide to get started, and fill out the YOLOv5 Survey to provide thoughts and feedback on your experience with YOLOv5. Thank you!


For issues running YOLOv5 please visit GitHub Issues. For business or professional support requests please visit

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YOLOv5 πŸš€ in PyTorch > ONNX > CoreML > TFLite

License:GNU General Public License v3.0


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