Itay Itzhak

I'm interested in



About

I am a PhD candidate at the Technion, lucky to be co-advised by Yonatan Belinkov and Gabriel Stanovsky at the Hebrew University in Jerusalem.

My research focuses on evaluating and interpreting LLMs, with particular interest in the reasoning and decision-making processes that underlie their behavior, including failures that reveal human-like cognitive biases. My work combines behavioral and representational analyses to better understand model tendencies and the impact of fine-tuning and pretraining.

I previously interned at Meta AI, where I studied attention dynamics in translation models, and completed my M.Sc. at Tel Aviv University with Omer Levy, where I investigated how token-level spelling information is encoded in embedding matrices.
Beyond model analysis, I co-organized the GEM workshop at ACL 2025, which aims to establish best practices for the evaluation of natural language generation systems across languages and tasks. I am also an active contributor to the EvalEval coalition, a community initiative to standardize and compare evaluation outputs across frameworks, promoting robust, scalable, and scientifically grounded evaluation practices.

I am always open to collaborations and enjoy discussing research, language models, and everything in between. Feel free to reach out via email!

Publications

DOVE: A Large-Scale Multi-Dimensional Predictions Dataset Towards Meaningful LLM Evaluation

Eliya Habba, Ofir Arviv, Itay Itzhak, Yotam Perlitz, Elron Bandel, Leshem Choshen, Michal Shmueli-Scheuer, Gabriel Stanovsky

ACL 2025
[Code] / [Webpage]

Trust Me, I'm Wrong: High-Certainty Hallucinations in LLMs

Adi Simhi, Itay Itzhak, Fazl Barez, Gabriel Stanovsky, Yonatan Belinkov

EMNLP 2025
[Code]

Instructed to Bias: Instruction-Tuned Language Models Exhibit Emergent Cognitive Bias

Itay Itzhak, Gabriel Stanovsky, Nir Rosenfeld, Yonatan Belinkov

TACL 2024
[Code]

The impact of tumor detection method on genomic and clinical risk and chemotherapy recommendation in early hormone receptor positive breast cancer

Yael Bar, Kfir Bar, Itay Itzhak, Chen Shitrit Niselbaum, N. Dershowitz, E. Shachar, A. Weiss-Meilik, O. Golan, I. Wolf, T. Menes, A. Sonnenblick

Breast 2021