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Xiangzheng Zhang

7 accepted papers

2026

Efficient Switchable Safety Control in LLMs via Magic-Token-Guided Co-Training

AAAI 2026technical

Current methods for content safety in Large Language Models (LLMs), such as Supervised Fine-Tuning (SFT) and Reinforcement Learning from Human Feedback (RLHF), often rely on multi-stage training pipelines and lack fine-grained, post-deployment controllability. To address these limitations, we propos

Cited by 0SourcePDFScholar
2026

Light-IF: Endowing LLMs with Generalizable Reasoning via Preview and Self-Checking for Complex Instruction Following

AAAI 2026technical

While advancements in the reasoning abilities of LLMs have significantly enhanced their performance in solving mathematical problems, coding tasks, and general puzzles, their effectiveness in accurately adhering to instructions remains inconsistent, particularly with more complex directives. Our inv

Cited by 0SourcePDFScholar
2026

SafeHarbor: Defining Precise Decision Boundaries via Hierarchical Memory-Augmented Guardrail for LLM Agent Safety

ICML 2026poster

With the rapid evolution of foundation models, Large Language Model (LLM) agents have demonstrated increasingly powerful tool-use capabilities. However, this proficiency introduces significant security risks, as malicious actors can manipulate agents into executing tools to generate harmful content.…

Cited by 0SourceScholar
2025

Chain-of-Thought Matters: Improving Long-Context Language Models with Reasoning Path Supervision

EMNLP 2025

Recent advances in Large Language Models (LLMs) have highlighted the challenge of handling long-context tasks, where models need to reason over extensive input contexts to aggregate target information. While Chain-of-Thought (CoT) prompting has shown promise for multi-step reasoning, its effectivene

Cited by 0SourcePDFScholar
2025

Expand VSR Benchmark for VLLM to Expertize in Spatial Rules

AAAI 2025technical

Distinguishing spatial relations is a basic part of human cognition which requires fine-grained perception on cross-instance. Although benchmarks like MME, MMBench and SEED comprehensively have evaluated various capabilities which already include visual spatial reasoning(VSR). There is still a la…

2025

Large Language Models Badly Generalize across Option Length, Problem Types, and Irrelevant Noun Replacements

EMNLP 2025

In this paper, we propose a “Generalization Stress Test” to assess Large Language Models’ (LLMs) generalization ability under slight and controlled perturbations, including option length, problem types, and irrelevant noun replacements. We achieve novel and significant findings that, despite high be

Cited by 0SourcePDFScholar
2025

Reasoning-Augmented Conversation for Multi-Turn Jailbreak Attacks on Large Language Models

EMNLP 2025

Multi-turn jailbreak attacks simulate real-world human interactions by engaging large language models (LLMs) in iterative dialogues, exposing critical safety vulnerabilities. However, existing methods often struggle to balance semantic coherence with attack effectiveness, resulting in either benign