Deprecated Metrics

This page lists AIMon metrics that have been deprecated in favor of more accurate or modular replacements. These are no longer actively maintained but may still be available for legacy users.

Hallucination (deprecated)

Deprecated July 2025 — Replaced by Groundedness for improved factual consistency and hallucination detection in RAG and QA settings.

The hallucination metric, previously powered by the HDM-2 model, scored generated text for factual errors based on context alignment and annotated hallucinated spans.

We now recommend using the groundedness metric, which offers improved explainability, instruction-level traces, and better support for real-time and retrieval-augmented applications.

Legacy model: GitHub · Hugging Face