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The Watchdog at the Gates: How HalMit Hunts Hallucinations in LLM Agents

In the ever-expanding ecosystem of intelligent agents powered by large language models (LLMs), hallucinations are the lurking flaw that threatens their deployment in critical domains. These agents can compose elegant, fluent answers that are entirely wrong — a risk too great in medicine, law, or finance. While many hallucination-detection approaches require model internals or external fact-checkers, a new paper proposes a bold black-box alternative: HalMit. Hallucinations as Boundary Breakers HalMit is built on a deceptively simple premise: hallucinations happen when LLMs step outside their semantic comfort zone — their “generalization bound.” If we could map this bound for each domain or agent, we could flag responses that veer too far. ...

July 23, 2025 · 3 min · Zelina