# RLMF: Teaching LLMs to Know What They Don't Know

> LLMs don't just hallucinate facts - they lie about their confidence. RLMF uses metacognitive self-judgment as a reward signal to align expressed uncertainty with actual correctness, outperforming standard RL by up to 63% across six benchmarks.

Canonical URL: https://kravhal.kcsatish.com/insights/week-37
Edition: Week 22 · July 2026
Tags: LLMs, Optimization, Calibration
Reading time: 8 min read

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