Opik
End-to-end AI observability platform for developers with agent testing, optimization, and monitoring.
- Freemium· from $19/month
- API Available
- Open Source
What is Opik?
Opik is an AI Observability tool. End-to-end AI observability platform for developers with agent testing, optimization, and monitoring. Opik is freemium: it has a free plan, and paid plans start at $19/month. A free trial is available. It is aimed at developers, ai developers and data scientists.
Opik is an end-to-end AI observability platform designed for developers, offering agent testing, optimization, and monitoring capabilities. It provides tools to evaluate, test, and ship LLM applications, with features like logging agent steps, detecting silent errors, and managing agents in production.
Built for developers, ai developers and data scientists.
Key capabilities
Features
Detect Silent Errors & Debug Traces
Fix Issues at the Source with Ollie
Validate Fixes with Test Suites & Evals
Monitor & Manage Agents in Production
End-to-End AI Evaluation Platform
Track & Optimize Coding Agent Spend
Optimize Prompts & Agentic Systems
MLOps: Track & Compare Model Training Runs
Log Thousands of LLM Traces, Fast
Enterprise-Grade Reliability & Security
Use cases
- Evaluate LLM applications with observability tools across dev and production lifecycle
- Test and ship LLM applications with agent testing and monitoring
- Detect silent errors and debug traces in agent workflows
- Fix issues at the source using Ollie for agent debugging
- Validate fixes with test suites and evaluations for agent performance
- Monitor and manage agents in production environments
Who it's for
Pros & cons
Pros
- Public API available
- Free plan available
- Enterprise SSO support
- SOC 2, ISO 27001, ISO 9001, HIPAA, and GDPR compliance
- Easy integration with tools like OpenAI, Anthropic, LangChain, and VS Code
Cons
No documented limitations yet.
Pricing
Freemium — paid plans start at $19/month. Free trial available.
| Plan | Price |
|---|---|
| Free Cloud | Free |
| Pro Cloud | $19 / month |
| Enterprise | Custom |
| Expert Annotation UI | Free |
| Free | Free |
| Pro10 seats | $19 / month |
Developer & API
Public SDK API available
- SDKs
- Python SDK, TypeScript SDK, Python, TypeScript
Open source· Apache-2.0· 22.3K stars· 1.8K forks
Security & compliance
- SOC 2
- ISO 27001
- SSO
- SAML
- Data deletion
As stated on Opik's website — not independently verified by AiByts.
FAQ
What is Opik?
Opik is an AI Observability tool. End-to-end AI observability platform for developers with agent testing, optimization, and monitoring. Opik is an end-to-end AI observability platform designed for developers, offering agent testing, optimization, and monitoring capabilities. It provides tools to evaluate, test, and ship LLM applications, with features like logging agent steps, detecting silent errors, and managing agents in production.
Is Opik free?
Opik has a free plan; advanced features require a paid plan.
How much does Opik cost?
Opik offers 6 plans: Free Cloud (Free), Pro Cloud ($19 / month), Enterprise (Custom), Expert Annotation UI (Free), Free (Free) and Pro ($19 / month).
Does Opik have an API?
Yes, Opik offers a public SDK API for building custom integrations.
Who should use Opik?
Opik is built for developers, ai developers and data scientists. Common uses: evaluate LLM applications with observability tools across dev and production lifecycle, test and ship LLM applications with agent testing and monitoring, detect silent errors and debug traces in agent workflows and fix issues at the source using Ollie for agent debugging.
What does Opik integrate with?
Opik integrates with OpenAI, Anthropic, LangChain and VS Code.
Is Opik open source?
Yes, Opik is open source under the Apache-2.0 license.
What are the best alternatives to Opik?
Similar tools on AiByts include Braintrust, Respan, Helicone, Portkey and Keywords AI.
Opik news & updates
Jev vs. LLM-as-a-Judge for AI Evals
A model that answers yes/no questions instead of writing text came out 3.5× cheaper and 3.8× faster than our gpt-4o-mini judge on 1,000 real production turns, and agreed with it on 897 of them.
Opik Blog1 min readComet Extends Agent Observability and Evaluation to Nebius AI Cloud
Comet’s Opik platform is now listed in Nebius AI Cloud Applications, bringing agent observability, evaluation, and the full Comet AI development platform to one of the most powerful AI cloud platforms available today.
Opik Blog1 min readCapturing a 400-Turn Claude Code Session in a Single Image
We ran a small model over thousands of Claude Code session and discovered how people really use coding agents. Comet Cost Intelligence is a tool for optimizing engineering token spend on Claude Code and Codex.
Opik Blog1 min readPrompt Management for AI Agents: The Best Tools Compared (2026)
Despite how often prompts change once an agent is live, most teams don’t have a real prompt management process. Somewhere on a shared drive is prompt_final_v2.txt, and somewhere else is a version someone pasted into a Slack DM that is two edits newer.
Opik Blog1 min readExport TrueFoundry AI Gateway traces to Opik with OpenTelemetry
When an LLM call is slow, expensive, or wrong, you want to see the whole request: the prompt, the model, the tokens, the tool calls, the latency. If your traces live in one tool and your evaluation lives in another, that picture is split in two.
Opik Blog1 min readUX Without a UI: Notes from Researching Terminal UX for Opik MCP
The way developers interact with products is changing, and opening your app’s dashboard is no longer the obvious entry point. They want to use their apps inside the terminal. Why? Because they’re already there. We’re seeing more users instrumenting MCP and it makes sense.
Opik Blog1 min readDiffusion Language Models, From Scratch to Production
“Language model” used to be a very general term for statistical models trained on language tasks. It included everything from n-gram models to LSTMs and GRUs.
Opik Blog1 min read
What is AI Observability? A Complete Guide to Debugging and Monitoring Modern AI Systems at Scale
Your new AI product is live. Infra dashboards are all green. Latency is low, error rates are flat, and CPU/GPU utilization looks healthy. Yet your Slack channels are full of screenshots from users asking, “Why did it do this?” The same user goal and high-level prompt can still produce wildly…
Opik Blog14 min read
LLM Model Selection: How to Pick the Right Model for Every Agentic Task
Someone on your team defaulted to the latest and greatest model available, which is also the most expensive model. Maybe it was an agent calling the flagship model for every tool call or a coding agent set to its most capable model out of the box. It worked, so nobody revisited it.
Opik Blog8 min read
Best LLM Observability Tools of 2026: Top Platforms & Features
LLM applications are everywhere now, and they’re fundamentally different from traditional software. They’re non-deterministic. They hallucinate. They can fail in ways that are hard to predict or reproduce (and sometimes hilarious).
Opik Blog17 min read
Details are compiled from Opik's website and public sources, last verified Oct 3, 2026. Features and pricing change — confirm on the official site before you buy.
Try Opik
Freemium · from $19/month
Tags
- AI Observability
- LLM Monitoring
- Agent Testing
- MLOps
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