---
title: "Teaching AI models to say “I’m not sure”"
date: 2026-04-22
source: https://news.mit.edu/2026/teaching-ai-models-to-say-im-not-sure-0422
description: "A new training method improves the reliability of AI confidence estimates without sacrificing performance, addressing a root cause of hallucination in reasoning models."
---

# Teaching AI models to say “I’m not sure”

A new training method improves the reliability of AI confidence estimates without sacrificing performance, addressing a root cause of hallucination in reasoning models.

*Published: 2026-04-22*