Comet Opik
Comet Opik is an open-source LLM observability and evaluation platform for tracing, testing, and monitoring AI agents and applications. · Comet · AI
Overview
Comet Opik is an open-source LLM observability and evaluation platform for tracing, debugging, and evaluating LLM-powered applications and agents.
Good fit
Use Comet Opik to trace, debug, and evaluate LLM-powered applications and agents in development or production.
- LLM app developers
- AI agent teams
- MLOps engineers
Not a fit
Avoid if you need dedicated GPU compute for model training; Opik is an observability and evaluation tool, not a training platform.
- need GPU training compute
- need unlimited cloud spans without self-hosting
Quickstart · 4 steps
- Create a free Comet account for Opik Cloud, or self-host from GitHub.
- Install the Opik SDK for Python or TypeScript.
- Add tracing calls around your LLM or agent code.
- Review traces, spans, and evaluation scores in the Opik dashboard.
Other free ai options
Free tierWhat you get freeRiskCard
GitHub · AI
2,000 code completions per month · 50 chat requests per month (including Copilot Edits) · Agent mode, CLI, and MCP servers included with limited usage
Billing risk: None
No card
Google Cloud · AI
Sessions run up to 12 hours, depending on availability · GPU/TPU access heavily restricted on the free tier · Exact resource limits are not published and vary over time
Billing risk: None
No card
Google Cloud · AI
Free input and output tokens on supported models · Limited access to certain models · 5,000 free Google Search grounding requests/month, shared across Gemini 3.x models
Billing risk: None
No card
Hugging Face · AI
Unlimited public repos (best-effort free storage) · 100GB private storage · Storage limits apply across models, datasets, and buckets
Billing risk: None
No card