What is AI evaluation?

AI evaluation is the process of measuring whether an AI's output meets defined criteria for quality, accuracy, and safety.

What AI evaluation means

AI evaluation is how you decide whether an AI output is good. It turns a subjective sense of quality into a measurable verdict: pass or fail, a score, or a category, judged against criteria you set in advance.

Evaluation can happen offline (testing a prompt or model against a fixed dataset before shipping) or online (checking live outputs in production as they are generated). Monitoring automations is the online case.

How outputs get evaluated

Evaluations use a mix of methods: deterministic checks for literal requirements, model-based scoring (an LLM as a judge) for semantic ones, and human review for the cases that need a person. Each output ends up with a verdict and ideally an explanation of why it passed or failed.

Aggregated over time, evaluations become metrics: pass rate per workflow, failure types, and trends that reveal when a prompt or model has drifted.

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