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arXiv cs.LG
arXiv cs.LG
7/24/2026
Uncertainty-Aware Trust Estimation for Multi-LLM Systems via Structured Expert Judgement

Uncertainty-Aware Trust Estimation for Multi-LLM Systems via Structured Expert Judgement

Short summary

This paper frames multi-LLM aggregation as an uncertainty-aware trust estimation problem, adapting Cooke-style structured expert judgement from decision theory to weight LLMs by calibration quality. Context-aware calibration questions estimate each model's reliability, penalizing overconfident incorrect predictions. On MMLU and MMLU-Pro, Cooke weighting becomes critical under heterogeneity and contamination, achieving superior accuracy-reliability balance and robustness against unreliable or adversarial experts.

  • Multi-LLM aggregation reformulated as uncertainty-aware trust estimation using Cooke-style log weighting
  • Calibration questions penalize overconfident incorrect predictions and favor well-calibrated experts
  • Cooke weighting proves critical under heterogeneous and contaminated expert panels on MMLU and MMLU-Pro

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