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Anthony Hartshorn

3 accepted papers

2026

What Characterizes Effective Reasoning? Revisiting Length, Review, and Structure of CoT

ICML 2026poster

Large reasoning models (LRMs) spend substantial test-time compute on long chain-of-thought (CoT) traces, but what *characterizes* an effective CoT remains unclear. While prior work reports gains from lengthening CoTs and increasing review via appended *wait* tokens, recent studies suggest that short…

Cited by 0SourceScholar
2025

Calibrating Verbal Uncertainty as a Linear Feature to Reduce Hallucinations

EMNLP 2025

LLMs often adopt an assertive language style also when making false claims. Such ”overconfident hallucinations” mislead users and erode trust. Achieving the ability to express in language the actual degree of uncertainty around a claim is therefore of great importance. We find that ”verbal uncertain

Cited by 0SourcePDFScholar
2025

HalluLens: LLM Hallucination Benchmark

ACL 2025long

Large language models (LLMs) often generate responses that deviate from user input or training data, a phenomenon known as “hallucination.” These hallucinations undermine user trust and hinder the adoption of generative AI systems. Addressing hallucinations is important for the advancement of LLMs.…