Weights & Biases

Weights & Biases streamlines the entire machine learning lifecycle from experimentation to deployment. Track every detail of model training runs, compare results across experiments, and identify what distinguishes a good model from a great one.

Highlights

• Experiment tracking with real-time logging and version control
• Hyperparameter optimization (Sweeps) for rapid model tuning
• Model registry and artifact management with governance
• AI application monitoring and evaluation (Weave) for agents and LLMs
• Self-hosted and dedicated deployment options for enterprise
• SDK and API for seamless integration into existing workflows

Used by researchers at major AI labs and teams building production systems, Weights & Biases reduces trial-and-error in model development. The free tier works for individuals and small teams; organizations scale to premium plans for advanced governance, concurrent runs, and dedicated infrastructure.