Papers by Reza Khanmohammadi
How Reliable are Confidence Estimators for Large Reasoning Models? A Systematic Benchmark on High-Stakes Domains (2026.eacl-long)
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Reza Khanmohammadi, Erfan Miahi, Simerjot Kaur, Charese Smiley, Ivan Brugere, Kundan S Thind, Mohammad M. Ghassemi
| Challenge: | Large Reasoning Models often struggle with confidence calibration, authors say . authors: accurate confidence scores are essential to build trustworthy systems . |
| Approach: | They propose a Reasoning Model Confidence estimation benchmark to assess LRM confidence . the benchmark is constructed from 347,496 reasoning traces from six popular LRMs . |
| Outcome: | The proposed benchmark compares ten different representation-based methods on a wide range of architectures. |
Calibrating LLM Confidence by Probing Perturbed Representation Stability (2025.emnlp-main)
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Reza Khanmohammadi, Erfan Miahi, Mehrsa Mardikoraem, Simerjot Kaur, Ivan Brugere, Charese Smiley, Kundan S Thind, Mohammad M. Ghassemi
| Challenge: | Despite their impressive performance, large language models (LLMs) consistently struggle with confidence calibration. |
| Approach: | They propose a method to analyze internal representational stability in large language models by applying adversarial perturbations to final hidden states and using a lightweight classifier to predict answer correctness. |
| Outcome: | CCPS significantly outperforms existing methods on LLMs from 8B to 32B parameters in multiple-choice and open-ended formats. |