Guy Bar-Shalom

@GuyBarSh

Postdoc @Cornell
Trying to better understand LLMs
Empire AI Fellow | Ex-Research Intern @Verily & @Meta

Israel barsguy.github.io Joined February 2023

128 Following 102 Followers 55 Posts

Latest posts 5

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Guy Bar-Shalom @GuyBarSh Apr 15

New blogpost out 📃

"Detecting LLM Misbehaviors from the Inside Out with Deep Learning on Structured Data" (ffabffrasca.substack.com/p/detecting-ll…) [1/8]

Guy Bar-Shalom @GuyBarSh Oct 26

[1/5] 🍋 New paper: LEMON, a misbehavior monitor that transfers zero-shot to LLMs it has never seen.

It flags hallucinations & jailbreaks online, token by token, from attention maps, with <10% overhead.

w/ @megamor2 @ffabffrasca @HaggaiMaron

🌐 barsguy.github.io/LEMON_project_…
🧵👇

Guy Bar-Shalom @GuyBarSh Feb 19

Check out our new ICLR 2026 paper - we explore hallucination detection through graph learning. Take a look!

Fabrizio Frasca @ffabffrasca Feb 18

🧵"Neural Message Passing on Attention Graphs for Hallucination Detection" at #ICLR2026 !

🕸️We apply GNNs on the structured data LLMs produce as they generate text (e.g. attentions) to predict their errors.

📄 arxiv.org/abs/2509.24770
🤝 @GuyBarSh (co-1st) @YftahZ @HaggaiMaron

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Guy Bar-Shalom @GuyBarSh Feb 2

Happy to share my new #ICLR2026 papers !

Guy Bar-Shalom @GuyBarSh Oct 4, 2025

[1/7] New paper: "Beyond Token Probes: Hallucination Detection via Activation Tensors with ACT-ViT" #NeurIPS2025 [arxiv.org/pdf/2510.00296]

Joint work with: @ffabffrasca (co-first), @yaniv_galron, @YftahZ , @HaggaiMaron