Evaluation MetricsEvaluation Metrics

Evaluation metrics are the specific measurements used to score LLM outputs against defined quality criteria. Each metric targets a different dimension of quality, such as whether the response is factually grounded, relevant to the question, free of harmful content, or genuinely useful to the user. Choosing the right set of metrics for your use case is one of the most important decisions in building an eval system, since metrics determine what your system optimizes for and what failure modes it can actually detect.