Author

Serhii Mytsyk

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Preprint Aug 2026

Mitigating LLM sycophancy with RL-based fine-tuning: Bayesian Truth Serum approach

A methodology for mitigating sycophancy that employs the Bayesian Truth Serum (BTS), a peer-prediction mechanism, as the reward in Group Relative Policy Optimization (GRPO) to fine-tune an LLM.

Serhii Mytsyk, Yiming Zhang, Vikram Krishnamurthy · 0 citations