Deploy machine learning models in production

Cortex is an open source platform that takes machine learning models—trained with nearly any framework—and turns them into production web APIs in one command.

Demo

Key features

  • Autoscaling: Cortex automatically scales APIs to handle production workloads.

  • Multi framework: Cortex supports TensorFlow, PyTorch, scikit-learn, XGBoost, and more.

  • CPU / GPU support: Cortex can run inference on CPU or GPU infrastructure.

  • Rolling updates: Cortex updates deployed APIs without any downtime.

  • Log streaming: Cortex streams logs from deployed models to your CLI.

  • Prediction monitoring: Cortex monitors network metrics and tracks predictions.

  • Minimal configuration: Deployments are defined in a single cortex.yaml file.

Usage

Define your API

# predictor.py
model = download_my_model()
def predict(sample, metadata):
return model.predict(sample["text"])

Configure your deployment

# cortex.yaml
- kind: deployment
name: sentiment
- kind: api
name: classifier
predictor:
path: predictor.py
tracker:
model_type: classification
compute:
gpu: 1

Deploy to AWS

$ cortex deploy
creating classifier (http://***.amazonaws.com/sentiment/classifier)

Serve real-time predictions

$ curl http://***.amazonaws.com/sentiment/classifier \
-X POST -H "Content-Type: application/json" \
-d '{"text": "the movie was great!"}'
positive

Monitor your deployment

$ cortex get classifier --watch
status up-to-date available requested last update avg latency
live 1 1 1 8s 123ms
class count
positive 8
negative 4

How it works

The CLI sends configuration and code to the cluster every time you run cortex deploy. Each model is loaded into a Docker container, along with any Python packages and request handling code. The model is exposed as a web service using Elastic Load Balancing (ELB), Flask, TensorFlow Serving, and ONNX Runtime. The containers are orchestrated on Elastic Kubernetes Service (EKS) while logs and metrics are streamed to CloudWatch.

Examples