Weights & Biases
Free tierML experiment tracking, model evaluation, and LLMOps platform used by leading AI teams
Free tier available·Technical·API available
Key strengths
Industry standard for ML experiment trackingWeave module for LLM tracing and evaluationSweeps for hyperparameter optimizationModel registry with lineage trackingAcquired by CoreWeave — deep GPU cluster integration
Free tier + paid plans · from $50 USD/mo
US
Founded 2017
Self-hostable
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