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Weights & Biases

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Data Analytics & Predictive Modeling · API

Machine learning platform for experiment tracking, model evaluation, and LLMOps

Free tierAPI availableCloud hosted
Pricing: Generous free tier for academic and individual research; Team and Enterprise subscriptions for shared workspaces.
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Span-01

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Developer Frameworks & Infrastructure · API

Open telemetry and LLM observability platform for AI agents

Free tierAPI availableCloud hosted
Pricing: Free developer tier for API telemetry; volume pricing based on span ingestion.
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