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Weights & Biases

CoreWeave · Evals & observability
Experiment tracking and Weave for LLM apps, part of CoreWeave.

W&B Models tracks training runs; W&B Weave traces and evaluates LLM applications; CoreWeave acquired the company in 2025.

Free · from $50used by 0+ StackOpen Weights & Biases ↗

News · 7

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Nscale's planned NYSE listing at up to a $35B valuation is shadowed by a delayed Norway data centerAI Weekly (citing Bloomberg) · Oct 16Anthropic reportedly plans public SEC filing on Oct. 26 for a mid-November IPO raising up to $100BIFR · Oct 16Perplexity open-sources SPACE, the agent sandbox that runs its Computer product, on GitHubPerplexity · Oct 15CoreWeave credit default swaps hit distress levels as its bonds yield nearly 16%CNBC · Oct 15Anthropic tells investors Q3 revenue hit $16.8B and it turned adjusted profit before IPOCNBC · Oct 15

Deals · 1

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CoreWeave raises $1.5B in the largest US tech IPO since 2021 at a $23B valuationStanford HAI · AI Index 2026 · Mar 28

Research · 0

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Evals & observability