# Weights & Biases

> Track model experiments and evaluate AI applications

Weights & Biases records and compares machine learning experiments. Developers log training configuration, metrics, and model artifacts from their code, then inspect runs to see how a change affects the results. Visualizations and reports make those comparisons shareable, while the registry organizes versions of models and datasets with their lineage.

W&B Weave extends the workflow to applications built around language models. It traces calls, retrieval operations, and agent steps so developers can examine what happened during a run. Evaluation and prompt-management tools help compare application behavior across changes, with cost tracking available alongside the traces for deployed AI applications.

## Listing details

- Canonical BetaNeon page: https://betaneon.com/products/weights-and-biases
- Official website: https://wandb.ai/site/
- Category: Developer tools / ML engineering & evaluation
- Status: Launched
- Topics: Evaluation, Experiment tracking, MLOps, Machine learning, Prompt management
- Listing updated: 2026-10-30T16:54:27.068Z
- Information source: https://wandb.ai/site/

This is a product introduction, not an endorsement. Confirm current availability, features, and prices on the official website. Community upvotes on BetaNeon are not star ratings.