Websitecomet.com/site/products/opik/
CategoryAI / LLM Observability
LicenseApache 2.0 (open source)
PricingFree (open source), Comet Cloud plans available

Overview

Opik is an open-source platform for evaluating and monitoring LLM applications. Traces, metrics, datasets, and experiment tracking. By Comet ML.

Pros

  • Apache 2.0 license
  • End-to-end LLM tracing
  • Automated evaluation metrics
  • Dataset management
  • Experiment tracking
  • Self-hosted option

Cons

  • Newer than alternatives like LangSmith
  • Documentation still evolving
  • Comet ecosystem dependency
  • UI less mature
  • Limited integrations outside Comet

Verdict

Opik fills a real gap: systematic evaluation of LLM applications. While most teams rely on vibes-based testing, Opik provides structured experiment tracking, automated metrics, and dataset management. The Apache 2.0 license and self-hosting option mean you can evaluate your LLM apps without sending data to a third party.

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