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How to use this guide

Use this guide to choose the right Fiddler evaluators and metrics for what you’re building. Start by picking your observability type — a Gen AI application, a single LLM, a predictive (ML) model, or real-time Guardrails — then select a use case to see which metrics Fiddler rates Recommended, worth a Consider, or Optional for that scenario. Open any metric card for its per-use-case rationale, evaluator type and model provider, and a link to the documentation. Use Show more filters to narrow by evaluator type, model provider, or observability objective, or search by name to jump straight to a specific metric. Below the guide, Cookbooks & Resources pairs proven, copy-pasteable recipes with your selection — worked examples for your chosen use case — and Use Your Own Agent exports your current filters as context for Claude or any agent.