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In this work, we make two contributions towards understanding of in-context learning of linear models by transformers. First, we investigate the adversarial robustness of in-context learning in transformers to hijacking attacks -- a type of…

Machine Learning · Computer Science 2025-08-07 Usman Anwar , Johannes Von Oswald , Louis Kirsch , David Krueger , Spencer Frei

Modern large reasoning models (LRMs) exhibit impressive multi-step problem-solving via chain-of-thought (CoT) reasoning. However, this iterative thinking mechanism introduces a new vulnerability surface. We present the Deadlock Attack, a…

Machine Learning · Computer Science 2025-10-21 Mohan Zhang , Yihua Zhang , Jinghan Jia , Zhangyang Wang , Sijia Liu , Tianlong Chen

Chain-of-Thought (CoT) reasoning is a critical capability for large language models (LLMs), enabling them to tackle com- plex multi-step tasks. While base LLMs, pre-trained on general text corpora, often struggle with reasoning due to a…

Computation and Language · Computer Science 2025-11-25 Zijian Wang , Yanxiang Ma , Chang Xu

Language Models (LMs) emit Chains-of-Thought (CoTs) that drive much of their capability. However, the same sequence that carries useful reasoning can also covertly convey messages: a misaligned model may embed covert information in its CoT…

Computation and Language · Computer Science 2026-05-27 Zhejian Zhou , Jonathan May

As large language models (LLMs) are becoming more capable and widespread, the study of their failure cases is becoming increasingly important. Recent advances in standardizing, measuring, and scaling test-time compute suggest new…

Machine Learning · Computer Science 2025-06-26 Mahdi Sabbaghi , Paul Kassianik , George Pappas , Yaron Singer , Amin Karbasi , Hamed Hassani

Vision-language-action (VLA) reasoning tasks require agents to interpret multimodal instructions, perform long-horizon planning, and act adaptively in dynamic environments. Existing approaches typically train VLA models in an end-to-end…

Computer Vision and Pattern Recognition · Computer Science 2025-09-19 Chi-Pin Huang , Yueh-Hua Wu , Min-Hung Chen , Yu-Chiang Frank Wang , Fu-En Yang

While chain-of-thought (CoT) prompting improves reasoning in large language models, its effectiveness in vision-language models (VLMs) remains limited due to over-reliance on textual cues and memorized knowledge. To investigate the visual…

Computer Vision and Pattern Recognition · Computer Science 2025-04-09 Charles Corbière , Simon Roburin , Syrielle Montariol , Antoine Bosselut , Alexandre Alahi

While chain-of-thought (CoT) monitoring is an appealing AI safety defense, recent work on "unfaithfulness" has cast doubt on its reliability. These findings highlight an important failure mode, particularly when CoT acts as a post-hoc…

Artificial Intelligence · Computer Science 2025-07-08 Scott Emmons , Erik Jenner , David K. Elson , Rif A. Saurous , Senthooran Rajamanoharan , Heng Chen , Irhum Shafkat , Rohin Shah

Chain-of-thought (CoT) reasoning has emerged as an effective approach for activating latent capabilities in LLMs. Interestingly, we observe that both CoT reasoning and self-training share the core objective: iteratively leveraging…

Computation and Language · Computer Science 2025-05-27 Zongqian Wu , Baoduo Xu , Ruochen Cui , Mengmeng Zhan , Xiaofeng Zhu , Lei Feng

As AI models are deployed with increasing autonomy, it is important to ensure they do not take harmful actions unnoticed. As a potential mitigation, we investigate Chain-of-Thought (CoT) monitoring, wherein a weaker trusted monitor model…

Artificial Intelligence · Computer Science 2025-11-26 Benjamin Arnav , Pablo Bernabeu-Pérez , Nathan Helm-Burger , Tim Kostolansky , Hannes Whittingham , Mary Phuong

Chain-of-Thought (CoT) prompting has achieved remarkable success in unlocking the reasoning capabilities of Large Language Models (LLMs). Although CoT prompting enhances reasoning, its verbosity imposes substantial computational overhead.…

Computation and Language · Computer Science 2026-04-21 Yifan Wang , Shiyu Li , Peiming Li , Xiaochen Yang , Yang Tang , Zheng Wei

The chain-of-though (CoT) prompting methods were successful in various natural language processing (NLP) tasks thanks to their ability to unveil the underlying complex reasoning processes. Such reasoning processes typically exhibit…

Computation and Language · Computer Science 2023-05-30 Ziqi Jin , Wei Lu

Current Vision-Language-Action (VLA) models rely on fixed computational depth, expending the same amount of compute on simple adjustments and complex multi-step manipulation. While Chain-of-Thought (CoT) prompting enables variable…

Robotics · Computer Science 2026-02-10 Yalcin Tur , Jalal Naghiyev , Haoquan Fang , Wei-Chuan Tsai , Jiafei Duan , Dieter Fox , Ranjay Krishna

Mobile-use agents powered by vision-language models (VLMs) have shown great potential in interpreting natural language instructions and generating corresponding actions based on mobile graphical user interface. Recent studies suggest that…

Computation and Language · Computer Science 2025-10-03 Lingzhong Dong , Ziqi Zhou , Shuaibo Yang , Haiyue Sheng , Pengzhou Cheng , Zongru Wu , Zheng Wu , Gongshen Liu , Zhuosheng Zhang

Black-box adversarial attack on vision-language pre-trained models is a practical and challenging task, as text and image perturbations need to be considered simultaneously, and only the predicted results are accessible. Research on this…

Computer Vision and Pattern Recognition · Computer Science 2026-04-21 Han Liu , Jiaqi Li , Zhi Xu , Xiaotong Zhang , Xiaoming Xu , Fenglong Ma , Yuanman Li , Hong Yu

Vision-Language-Action (VLA) models demonstrate remarkable potential for generalizable robotic manipulation. The execution of complex multi-step behaviors in VLA models can be improved by robust instruction grounding, a critical component…

Chain-of-Thought (CoT) reasoning has become a powerful framework for improving complex problem-solving capabilities in Multimodal Large Language Models (MLLMs). However, the verbose nature of textual reasoning introduces significant…

Computation and Language · Computer Science 2026-05-05 Xuan Shen , Yizhou Wang , Yufa Zhou , Xiangxi Shi , Pu Zhao , Yanzhi Wang , Jiuxiang Gu

Vision-Language-Action (VLA) systems have shown strong potential for language-driven robotic manipulation. However, scaling them to long-horizon tasks remains challenging. Existing pipelines typically separate data collection, policy…

Vision-Language-Action (VLA) models exhibit unprecedented capabilities for embodied intelligence. However, their extensive computational and memory costs hinder their practical deployment. Existing VLA compression and acceleration…

Computer Vision and Pattern Recognition · Computer Science 2025-09-12 Hengyu Fang , Yijiang Liu , Yuan Du , Li Du , Huanrui Yang

Reasoning capability is pivotal for Large Language Models (LLMs) to solve complex tasks, yet achieving reliable and scalable reasoning remains challenging. While Chain-of-Thought (CoT) prompting has become a mainstream approach, existing…

Computation and Language · Computer Science 2025-10-07 Honglin Lin , Qizhi Pei , Xin Gao , Zhuoshi Pan , Yu Li , Juntao Li , Conghui He , Lijun Wu