Weights & Biases (W&B) Review — MLOps Experiment Tracking, Acquired by CoreWeave for $1.7B

Weights & Biases built the experiment tracking platform that OpenAI, Meta, and NVIDIA all use to train AI models. After dominating MLOps for seven years, CoreWeave acquired W&B for $1.7B in 2025 to vertically integrate GPU compute with developer tooling. We review the platform, the acquisition, and what it means for ML teams.