Weights & Biases
Software
Tooling
Active
Experiment tracking for the training runs on this site — now CoreWeave-owned.
You're looking at a software record: a tool or platform in the AI stack — who maintains it and what hardware it runs on.
W&B logs the metrics, configs and artifacts of ML experiments — the lab notebook of most serious training teams, including many frontier labs. CoreWeave acquired it in 2025 for a reported ~$1.7B, bolting observability onto its GPU cloud.
How this connects to the rest of the stack
This record's links at a glance — click a group to jump to it.
Owned by
Sources
Record reviewed as of 2026-01-15 — see Methodology.