Opik
What is Opik?
TL;DROpik by Comet is an open-source AI observability and evaluation platform for tracing agents, monitoring LLM applications, testing prompts, tracking costs, and improving production AI reliability across development and deployment.
- Trace and debug every step of LLM and agent workflows
- Run automated evaluation workflows and quality checks
- Monitor production agents, costs, traces, and failures
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About
Opik by Comet is an open-source AI observability and evaluation platform for teams building LLM applications and agents. It helps developers trace agent steps, inspect prompts, monitor production behavior, run evals, track costs, and improve AI system reliability across development, testing, and production.
The platform is useful for SaaS founders and engineering teams that need visibility into what their agents and AI workflows are actually doing. Instead of guessing why a response failed, teams can inspect traces, evaluate outputs, test prompts, monitor hallucinations, and track model spend across workflows.
Opik is especially relevant for production AI teams because it combines observability, evaluations, prompt optimization, agent playgrounds, cost intelligence, and debugging tools in one system. The open-source core also makes it attractive for builders who want control before committing to enterprise infrastructure.
For FutureStack, Opik belongs in Developer Tools because it solves a critical AI product problem: understanding, testing, and improving LLM behavior after a product moves beyond demos. It is best for developers and founders building agents, RAG systems, coding tools, support bots, internal copilots, and model-powered SaaS products.
Use Cases
Model Quality & Safety Monitoring
Monitor execution logs, latency bottlenecks, and output accuracy across agent runs.
Automated Testing & Bug Resolution
Generate test suites, run regression checks, and debug code issues automatically.
Contextual Knowledge Retrieval
Opik logs every step your agent takes, from user interactions to context retrieval and tool calls — with automated eval workflows to find and fix errors across development, testing, and production.
Multi-agent Task Delegation
Choose from six advanced prompt optimization algorithms to achieve more precise and consistent results throughout your agent, from orchestration and tool calling steps to model parameters and.
Key Features
- Trace and debug every step of LLM and agent workflows
- Run automated evaluation workflows and quality checks
- Monitor production agents, costs, traces, and failures
- Open-source core with hosted and enterprise options
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Pricing summary
Open-source core is free, with free hosted access and custom enterprise options for larger teams.
Pricing & Plans
Popular
Open Source
Run Opik locally for LLM tracing and evaluation workflows.
Free
- Open-source core
- Trace and debug AI workflows
- Evaluation and scoring tools
- Good for technical teams
Free Hosted
Start using Opik's hosted observability workflow for free.
Free
- Free hosted account
- Agent observability basics
- Cost and trace visibility
- No credit card start
Enterprise
Enterprise AI observability and evals through Comet.
Custom
- Custom pricing
- Enterprise compliance
- Advanced support
- Scale and governance controls
Other pricing notes
- The open-source core is free to use.
- Hosted access and enterprise capabilities can vary by usage and team requirements.
- Review current Comet pricing and deployment terms before purchase.
Pricing last checked: July 2026Official pricing
Pros & Cons
Pros
- Open-source core gives teams deployment flexibility
- Combines tracing, evaluation, and production monitoring
- Useful for debugging complex agent workflows
- Supports prompt optimization and quality workflows
- Strong fit for teams building production LLM systems
Cons
- Observability still requires useful instrumentation and metrics
- Evaluation quality depends on datasets and criteria
- Complex agent systems can create large trace volumes
- Hosted or enterprise needs may add cost
- More technical than simple application analytics tools
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