activity
20222026
most citedDoes Fine-Tuning LLMs on New Knowledge Encourage Hallucinations?

14 citations · 34 across the 16 of their papers we have counts for

collaborators

17 papers

cs.CL2026

Seeing the Forest for the Trees: Emergent Agreement from Individual Conversations

Adi Simhi, Yaniv Nikankin, Jonathan Herzig +3

As LLM agents interact in the wild and shape each other's decisions, understanding how they converge toward agreement becomes important. We study this in multi-turn conversations w…

cs.CL2026

Thinking to Recall: How Reasoning Unlocks Parametric Knowledge in LLMs

Zorik Gekhman, Roee Aharoni, Eran Ofek +3

While reasoning in LLMs plays a natural role in math, code generation, and multi-hop factual questions, its effect on simple, single-hop factual questions remains unclear. Such que…

cs.CL2026

Latent Reasoning with Supervised Thinking States

Ido Amos, Avi Caciularu, Mor Geva +4

Reasoning with a chain-of-thought (CoT) enables Large Language Models (LLMs) to solve complex tasks but incurs significant inference costs due to the generation of long rationales.…

cs.CL2025

HACK: Hallucinations Along Certainty and Knowledge Axes

Adi Simhi, Jonathan Herzig, Itay Itzhak +7

Hallucinations in LLMs present a critical barrier to their reliable usage. Existing research usually categorizes hallucination by their external properties rather than by the LLMs'…

cs.CL2025

ManagerBench: Evaluating the Safety-Pragmatism Trade-off in Autonomous LLMs

Adi Simhi, Jonathan Herzig, Martin Tutek +3

As large language models (LLMs) evolve from conversational assistants into autonomous agents, evaluating the safety of their actions becomes critical. Prior safety benchmarks have…

cs.CL2025

DRAGged into Conflicts: Detecting and Addressing Conflicting Sources in Search-Augmented LLMs

Arie Cattan, Alon Jacovi, Ori Ram +6

Retrieval Augmented Generation (RAG) is a commonly used approach for enhancing large language models (LLMs) with relevant and up-to-date information. However, the retrieved sources…

cs.CL2024★ 2 cited

Distinguishing Ignorance from Error in LLM Hallucinations

Adi Simhi, Jonathan Herzig, Idan Szpektor +1

Large language models (LLMs) are susceptible to hallucinations -- factually incorrect outputs -- leading to a large body of work on detecting and mitigating such cases. We argue th…

cs.CL2024

DoubleDipper: Improving Long-Context LLMs via Context Recycling

Arie Cattan, Alon Jacovi, Alex Fabrikant +8

Despite recent advancements in Large Language Models (LLMs), their performance on tasks involving long contexts remains sub-optimal. In this work, we propose DoubleDipper, a novel…

cs.CL2024

TACT: Advancing Complex Aggregative Reasoning with Information Extraction Tools

Avi Caciularu, Alon Jacovi, Eyal Ben-David +5

Large Language Models (LLMs) often do not perform well on queries that require the aggregation of information across texts. To better evaluate this setting and facilitate modeling…

cs.CL2024★ 14 cited

Does Fine-Tuning LLMs on New Knowledge Encourage Hallucinations?

Zorik Gekhman, Gal Yona, Roee Aharoni +4

When large language models are aligned via supervised fine-tuning, they may encounter new factual information that was not acquired through pre-training. It is often conjectured th…

cs.CL2024

Constructing Benchmarks and Interventions for Combating Hallucinations in LLMs

Adi Simhi, Jonathan Herzig, Idan Szpektor +1

Large language models (LLMs) are prone to hallucinations, which sparked a widespread effort to detect and prevent them. Recent work attempts to mitigate hallucinations by interveni…

cs.LG2024

Representation Surgery: Theory and Practice of Affine Steering

Shashwat Singh, Shauli Ravfogel, Jonathan Herzig +3

Language models often exhibit undesirable behavior, e.g., generating toxic or gender-biased text. In the case of neural language models, an encoding of the undesirable behavior is…

cs.CL2024

A Chain-of-Thought Is as Strong as Its Weakest Link: A Benchmark for Verifiers of Reasoning Chains

Alon Jacovi, Yonatan Bitton, Bernd Bohnet +6

Prompting language models to provide step-by-step answers (e.g., "Chain-of-Thought") is the prominent approach for complex reasoning tasks, where more accurate reasoning chains typ…

cs.CL2024

Multilingual Instruction Tuning With Just a Pinch of Multilinguality

Uri Shaham, Jonathan Herzig, Roee Aharoni +3

As instruction-tuned large language models (LLMs) gain global adoption, their ability to follow instructions in multiple languages becomes increasingly crucial. In this work, we in…

cs.CL2023

A Comprehensive Evaluation of Tool-Assisted Generation Strategies

Alon Jacovi, Avi Caciularu, Jonathan Herzig +3

A growing area of research investigates augmenting language models with tools (e.g., search engines, calculators) to overcome their shortcomings (e.g., missing or incorrect knowled…

cs.CL2022★ 5 cited

mFACE: Multilingual Summarization with Factual Consistency Evaluation

Roee Aharoni, Shashi Narayan, Joshua Maynez +3

Abstractive summarization has enjoyed renewed interest in recent years, thanks to pre-trained language models and the availability of large-scale datasets. Despite promising result…

cs.CL2022★ 13 cited

TRUE: Re-evaluating Factual Consistency Evaluation

Or Honovich, Roee Aharoni, Jonathan Herzig +7

Grounded text generation systems often generate text that contains factual inconsistencies, hindering their real-world applicability. Automatic factual consistency evaluation may h…