Weights & Biases
Platform for tracking, training, and evaluating ML and LLM applications
Introduction
Weights & Biases is a developer platform for training and fine-tuning models, tracking experiments, and managing models from development to production. Its W&B Weave component supports building and evaluating agentic AI applications built on LLMs.
- Added on
- Nov 2, 2026
- Website
- wandb.ai
- Pricing model
- Freemium
Product information
What is Weights & Biases?
An MLOps and LLMOps platform for experiment tracking, model management, and LLM application evaluation.
How to use Weights & Biases?
Add the SDK to your project to log experiments and artifacts. Integrations are available for common ML frameworks, and Weave helps build and evaluate agentic applications.
Core features of Weights & Biases
- Experiment tracking and visualization
- Hyperparameter sweeps
- Model and dataset registry
- Artifact versioning
- AI application debugging and evaluation
- Prompt engineering tools
Use cases of Weights & Biases
- 1Training and fine-tuning LLMs
- 2Tracking ML experiments
- 3Building AI agents and applications
- 4Evaluating LLM outputs
Frequently asked questions about Weights & Biases
What is Weights & Biases?+
Weights & Biases is a developer platform for training models, tracking experiments, and evaluating GenAI applications.
What is W&B Weave?+
W&B Weave is a tool for building agentic AI applications.
Is Weights & Biases free?+
The platform offers a free tier, and it is free for academics.
Which category is Weights & Biases in?+
Weights & Biases is listed under AI Code Editor.