What does Weights & Biases do?

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wandb.ai

Weights & Biases provides an end-to-end AI development platform that helps teams build, train, evaluate, and deploy AI models and agents.

Weights & Biases is an AI developer platform that enables teams to build, train, track, evaluate, and deploy AI models and agent-based applications with confidence. The platform provides end-to-end tooling for experimentation, governance, and observability, helping data science and engineering teams collaborate across projects and scale AI initiatives safely.

Mission statement

The AI developer platform to build AI agents, applications, and models with confidence

Products & Services

Weave Platform

Enhance AI application performance with comprehensive monitoring and evaluation tools.

wandb.ai/site/weave 6 features

✓ Guardrails — Ensure Safe Outputs
✓ Evaluations — Measure AI Performance
✓ Traces — Visualize AI Call Log
✓ Agents — Track Agentic System Behavior
✓ Monitors — Continuously Improve in Production
✓ Playground — Experiment with LLMs

W&B Models Platform

Accelerates model development and governance through centralized tracking and automation.

wandb.ai/site/models 5 features

✓ Experiment Tracking — Gain Insights Quickly
✓ Automations for ML Workflows — Streamline ML Operations
✓ Governance and Lineage — Ensure Compliance
✓ Artifact & Dataset Versioning — Manage Versions Effectively
✓ SDK for Logging — Log Efficiently

Agent Reinforcement Trainer (ART) Platform

Accelerate RL fine-tuning for AI agents with ART's powerful framework.

wandb.ai/site/art 6 features

✓ GRPO Harness — Utilizes GRPO
✓ Faster RL Iteration — Accelerates RL Processes
✓ Serverless RL Backend — Eliminates Hardware Management
✓ Open-Source RL Framework — Modular RL System
✓ Multi-turn Rollouts — Enhances Agent Training
✓ Developer-Friendly API — Simplifies Model Training

RULER Product

Accelerate your reinforcement learning with automated, expert-free reward functions.

wandb.ai/site/ruler 6 features

✓ Integration with ART — Streamline RL Training
✓ LLM as Judge — Automate Reward Judging
✓ No Labels or Experts Required — Reduce Resource Needs
✓ Minimal Setup — Implement Quickly
✓ General-Purpose Functionality — Apply Universally
✓ 2-3x Faster Development — Accelerate Development Cycle

RAG Solution

Provides accurate, context-rich responses while minimizing costs and errors.

wandb.ai/site/solutions/rag 4 features

✓ Improved Factual Accuracy — Enhances Accuracy
✓ Fresh Context Data — Ensures Relevance
✓ Knowledge Retrieval Integration — Augments Responses
✓ Cost Efficiency — Reduces Costs

Registry Platform

Streamline the management and sharing of AI models and datasets with integrated lineage tracking.

wandb.ai/site/registry 5 features

✓ Model and Dataset Lineage — Enhance Governance
✓ Publish and Share Models and Datasets — Facilitate Collaboration
✓ Metadata Management — Streamline Data Organization
✓ Version Control — Ensure Consistency
✓ Registry Workflow Integration — Streamline Workflow

Common Questions

What does Weights & Biases do?: Weights & Biases is an AI developer platform that enables teams to build, train, track, evaluate, and deploy AI models and agent-based applications with confidence. The platform provides end-to-end tooling for experimentation, governance, and observability, helping data science and engineering teams collaborate across projects and scale AI initiatives safely.