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Charith Peris

Amazon

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#natural language process... Preprint Oct 2026

PersEvalBench: Can LLM Evaluators Judge Contextually Appropriate Use of Persona Information?

Large language model (LLM) evaluators are increasingly used to assess personalized assistants, yet whether they can reliably judge personalization has rarely been tested. We introduce PersEvalBench, a benchmark testing whether an evaluator can recognize appropriate and inappropriate uses of user history. It contains 40...

Xin-Yi Liu, H. Nayyeri, Emine Yilmaz et al. · 0 citations
#artificial intelligence Preprint Sep 2026

Belief-Calibrated Optimization: An Explicit World Model for Agentic Optimization

Belief-Calibrated Optimization is introduced, a method that writes that belief down as a persistent in-context document and continually revises that document as new candidates are evaluated, and reaches a higher train passrate than a matched control that lacks only the world model.

Yu-Han Chen, Zhi-Hua Tian, Mahavir Dabas et al. · 1 citation
Preprint Aug 2026

Hear2Act: Benchmarking When Prosody Should Change What an Assistant Does

Hear2Act is introduced, a unified evaluation protocol for text and spoken assistants with 480 persona-grounded scenarios, hidden user concerns, and objectively verifiable outcomes that show that prosody matters when lexical evidence is insufficient, and that audio-capable LLMs can recover information from speech but do...

Xin-Yi Liu, H. Nayyeri, Dilek Hakkani-Tur et al. · 3 citations · ⚡1

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