# Opik

> Open-source LLM evaluation and observability platform by Comet.

Opik is Comet's open-source LLM evaluation and observability platform that provides comprehensive tracing, evaluation, and monitoring for LLM applications in development and production. It captures detailed traces of every LLM call, evaluation metrics, and user feedback — enabling teams to systematically measure quality, catch regressions, and improve AI application performance over time. AI engineering teams building production LLM applications use Opik to implement rigorous quality assurance practices — moving from ad hoc testing to systematic, reproducible evaluation workflows that ensure consistent, reliable AI behavior.

## Quick facts

- Categories: Developer Tools, QA
- Pricing: Freemium (free plan + paid tiers)
- Free plan: Yes
- Official site: https://comet.com/site/products/opik
- Last checked: 2026-10-23

## Key features

- LLM evaluation and tracing
- Experiment tracking
- Prompt and dataset versioning
- CI/CD integration
- Team collaboration
- Open-source platform

## Use cases

- Evaluating LLM application quality
- Tracking ML experiment results
- Production AI monitoring
- Team AI development workflows

## Links

- Nextool.ai page: https://nextool.ai/tools/opik-comet/
- Alternatives: https://nextool.ai/alternatives/opik-comet/

Source: Nextool.ai (https://nextool.ai/tools/opik-comet/). Pricing and features change; confirm on the provider's site before relying on them.