Agentic Reasoning for Large Language Models
Authors: name: Tianxin Wei, name: Ting-Wei Li, name: Zhining Liu, name: Xuying Ning, name: Ze Yang, name: Jiaru Zou, name: Zhichen Zeng, name: Ruizhong Qiu, name: Xiao Lin, name: Dongqi Fu, name: Zihao Li, name: Mengting Ai, name: Duo Zhou, name: Wenxuan Bao, name: Yunzhe Li, name: Gaotang Li, name: Cheng Qian, name: Yu Wang, name: Xiangru Tang, name: Yin Xiao, name: Liri Fang, name: Hui Liu, name: Xianfeng Tang, name: Yuji Zhang, name: Chi Wang, name: Jiaxuan You, name: Heng Ji, name: Hanghang Tong, name: Jingrui He
Organization: University of Illinois at Urbana-Champaign

Reasoning is a fundamental cognitive process underlying inference, problem-solving, and decision-making. While large language models (LLMs) demonstrate strong reasoning capabilities in closed-world settings, they struggle in open-ended and dynamic environments. Agentic reasoning marks a paradigm shift by reframing LLMs as autonomous agents that plan, act, and learn through continual interaction. In this survey, we organize agentic reasoning along three complementary dimensions. First, we characterize environmental dynamics through three layers: foundational agentic reasoning, which establishes core single-agent capabilities including planning, tool use, and search in stable environments; self-evolving agentic reasoning, which studies how agents refine these capabilities through feedback, memory, and adaptation; and collective multi-agent reasoning, which extends intelligence to collaborative settings involving coordination, knowledge sharing, and shared goals. Across these layers, we distinguish in-context reasoning, which scales test-time interaction through structured orchestration, from post-training reasoning, which optimizes behaviors via reinforcement learning and supervised fine-tuning. We further review representative agentic reasoning frameworks across real-world applications and benchmarks, including science, robotics, healthcare, autonomous research, and mathematics. This survey synthesizes agentic reasoning methods into a unified roadmap bridging thought and action, and outlines open challenges and future directions, including personalization, long-horizon interaction, world modeling, scalable multi-agent training, and governance for real-world deployment.