What is Opik?
Opik is an open-source AI observability and evaluation platform from Comet. You instrument your application with a few lines of code (SDK, 60+ integrations, or OpenTelemetry), and it logs traces of every step your agent takes, such as context retrieval, tool calls, model responses, and token costs.
On top of the traces you can run Diagnostics to surface recurring errors, use the Ollie agent to suggest fixes, define pass/fail Test Suites or golden datasets scored with 40+ LLM-as-a-judge metrics, and monitor production dashboards with alerts. It also includes expert annotation queues, an agent playground, and Cost Intelligence for tracking coding agent spend such as Claude Code and Codex usage.
Key features
- Agent tracing and execution graphs with token and cost tracking
- Diagnostics for detecting and grouping recurring errors in traces
- Ollie agent suggesting fixes inside the platform
- Test Suites with assertions and 40+ LLM-as-a-judge metrics
- Production dashboards and alerts
- Annotation queues and custom feedback schemas for expert review
Who is it for
- AI developers
- ML engineers
- engineering teams building LLM applications and agents
Pros and cons
- Truly open source, with the same codebase as the hosted versions
- Integrations with 40+ AI frameworks and model providers, plus OpenTelemetry support
- Self-hosting, cloud, and enterprise deployment options
- Some features (SSO, service accounts, dedicated SLAs) are limited to the Enterprise plan
Opik pricing
| Plan | Price | Includes |
|---|---|---|
| Open Source | 0 USD | Self-hosted, full feature set, GitHub download |
| Free Cloud | 0 USD | Up to 10 team members, 25k spans/month, 60-day retention |
| Pro Cloud | 19 USD / month | Up to 50 team members, 100k spans/month, 60-day retention, customizable limits and retention; free trial available |
Prices copied from Opik pricing, checked October 12, 2026. Currency as shown by the vendor; taxes may apply.
Is Opik free?
Yes, there is a free plan. Open source version (self-hosted) is free. Free Cloud plan: up to 10 team members, 25k spans per month, 60-day data retention, Ollie coding harness trial. Pro Cloud offers a free trial.
Opik alternatives
| Tool | Price from | Free plan | Category |
|---|---|---|---|
 Groq | not listed | ? | APIs & models |
 Runpod | 0.74 USD/mo | trial | APIs & models |
 Cline | not listed | yes | APIs & models |
 Ollama | 20 USD/mo | yes | APIs & models |
 Amazon Bedrock | od 0,20 USD | ? | APIs & models |
 Claude Platform (Anthropic API) | 2 USD input / 10 USD output | no | APIs & models |
FAQ
What is Opik used for?
Open-source platform for tracing, evaluating, and monitoring LLM apps and AI agents, for developers building GenAI systems.
Is Opik free?
Yes, there is a free plan. Open source version (self-hosted) is free. Free Cloud plan: up to 10 team members, 25k spans per month, 60-day data retention, Ollie coding harness trial. Pro Cloud offers a free trial.
How much does Opik cost?
The cheapest paid plan is 19 USD/mo (vendor pricing, October 12, 2026).
What are the best Opik alternatives?
Closest alternatives: Groq, Runpod, Cline, Ollama, Amazon Bedrock.
Data checked October 12, 2026 on the vendor website (comet.com).