EVALS & OBSERVABILITY • 241 / 397
Measure whether the AI is good and trace where it fails.
Hallucination Rate
Hallucination rate measures how often outputs contain unsupported or invented claims under an eval definition.
Think of it like
Think of Hallucination Rate like testing and telemetry for any production service: quality must be measured, not guessed.
Real life
Teams use Hallucination Rate to decide whether a new release is safer, faster or more useful.
SRE lens
An incident assistant should have a very low unsupported-fact rate.
Remember thisHallucination rate measures how often outputs contain unsupported or invented claims under an eval definition.