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Mohit Iyyer

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#artificial intelligence Preprint Oct 2026

IdeaLens: Detecting AI Ideas in Long-form Writing

While modern AI detectors identify who wrote the words, emerging policies on AI use increasingly hinge on a different question: who came up with the ideas? We introduce IdeaLens, a detector that identifies whether a document's ideas came from a human or AI (idea provenance), regardless of who wrote its words. To focus...

Rishanth Rajendhran, Minjoon Choi, Jenna Russell et al. · 0 citations

OverThink: Slowdown Attacks on Reasoning LLMs

This work evaluates Overthink on proprietary and open-source reasoning models across the FreshQA, SQuAD, and MuSR datasets, and shows that newer generations of RLMs, while showing a drastic increase in per-token cost, also exhibit up to a 2.3x increase in reasoning tokens, leaving them more vulnerable to Overthink atta...

Abhinav Kumar, Jaechul Roh, Ali Naseh et al. · 92 citations · ⚡9
#artificial intelligence Review Jun 2026

Argument Collapse: LLMs Flatten Long-Form Public Debate

As LLMs are increasingly used to draft publicfacing arguments, they may flatten public debate by repeatedly introducing the same polished, plausible arguments. We study argument collapse, the tendency of essays generated by different LLMs to converge to a smaller set of main arguments, sub-arguments, and paragraph-leve...

Yekyung Kim, Ya-Pei Chang, Chau Minh Pham et al. · 0 citations

POLARIS: Guiding Small Models to Write Long Stories

The results suggest that length generalization is a meaningful stress test for creative-writing models and a useful lens for distinguishing otherwise close models.

Rishanth Rajendhran, Jenna Russell, Mohit Iyyer et al. · 1 citation
Review

AutoFiction : Measuring AI ability to execute long-horizon writing tasks

Initial human feedback reveals that AI-written novels contain interesting descriptions and concepts, but often fail in long-range coherence and prose quality, including conceptual repetition, distracting details, and weak dialogues.

Chau Minh Pham, Yapei Chang, Mohit Iyyer · 0 citations

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