Opik
FreeEvaluate, test, and ship LLM applications with a suite of observability tools to calibrate language model outputs across your dev and production lifecycle.
About Opik
Opik is an open-source AI observability platform by Comet, designed for the agentic era. It logs every step an AI agent takes—from user interactions to context retrieval and tool calls—with automated evaluation workflows to find and fix errors across development, testing, and production. Opik provides end-to-end observability, LLM-as-a-Judge metrics (30+), production monitoring with real-time alerting, cost intelligence for coding agents, test suites with assertions, and a powerful coding assistant (Ollie) that automatically fixes issues in the codebase. It also includes an Agent Playground for end-to-end testing and a Prompt Optimizer with six advanced algorithms. As a true open-source project, its core features are available for free.
Key Features
Pros & Cons
- Open-source with core features free and self-hostable
- End-to-end observability from user input to tool calls
- Automated evaluation workflows with 30+ metrics
- LLM-as-a-Judge scoring reduces manual review
- Production monitoring with guardrails and alerts
- Test suites with assertions enable repeatable unit tests
- Ollie coding assistant auto-fixes codebase issues from traces
- Agent Playground allows safe experimentation