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opik

Free

Debug, evaluate, and monitor your LLM applications, RAG systems, and agentic workflows with comprehensive tracing, automated evaluations, and production-ready dashboards.

Model APIsFreeFree tier
Type
Open Source
Company
Comet

About opik

Opik is an open-source platform for debugging, evaluating, and monitoring LLM applications, RAG systems, and agentic workflows. It records every LLM call, tool invocation, and agent step for full traceability, enables building test suites from real production traces, and supports automated online evaluation with LLM-as-a-judge and heuristic metrics. Opik also includes prompt optimization algorithms, a Prompt Playground, versioned prompt management, and an MCP server to connect Claude Code, Cursor, or VS Code Copilot directly to your workspace. It integrates with 50+ providers and frameworks (OpenAI, Anthropic, LangChain, etc.) and can be self-hosted on Docker or Kubernetes for full data control.

Key Features

Log traces: record every LLM call, tool invocation, and agent step with full request/response logs
Build test suites from traces: convert production traces into test cases and run automated test suites
Online evaluation: automatically score incoming traces with LLM-as-a-judge and heuristic metrics
Prompt optimization: automatically generate and test prompt variants using six optimization algorithms
Prompt management: store and version prompts, compare results in the Prompt Playground
MCP server: connect Claude Code, Cursor, or VS Code Copilot to read traces, score outputs, and run experiments from chat
Self-hosting: deploy on your own infrastructure with Docker locally or Kubernetes at scale
Integrations with 50+ providers and frameworks including OpenAI, Anthropic, and LangChain

Pros & Cons

Pros
  • Open-source with full source code available on GitHub
  • Comprehensive observability including tracing, evaluation, and monitoring
  • Automated LLM-as-a-judge evaluations reduce manual scoring effort
  • Support for six prompt optimization algorithms to find best-performing prompts
  • Easily integrate with 50+ LLM providers and frameworks
  • Self-hosting option provides full control over data
  • MCP server enables AI-assisted development workflows

Best For

Building and debugging chatbotsDeveloping RAG pipelinesCreating multi-step agent workflowsMonitoring AI application performance in productionImproving prompt quality through automated experimentation

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FAQ

What is Opik?
Opik is an open-source platform that helps you understand what your LLM application is doing, measure how well it’s working, and systematically make it better. It logs traces, enables evaluation, and provides production monitoring.
How can I use Opik with my development environment?
Opik provides an MCP server that allows you to connect Claude Code, Cursor, or VS Code Copilot directly to your Opik workspace. You can read traces, score outputs, and run experiments from chat without opening the UI.
Can I self-host Opik?
Yes, Opik can be deployed on your own infrastructure using Docker locally or Kubernetes at scale, giving you full control over your data.