A survey on large language model based autonomous agents
Lei WangChengbang MaXueyang FengZeyu ZhangHao-ran YangJingsen ZhangZhi-Yang ChenJiakai TangXu ChenYankai Lin
Establishes a unified framework for constructing large language model-based autonomous agents while systematically reviewing their applications across science and engineering, current evaluation methods, and open research challenges.
Artificial intelligence research is shifting rapidly from isolated, rule-based systems toward autonomous agents capable of operating in complex, dynamic, real-world environments. Traditional reinforcement learning agents struggle to replicate human-like decision-making because they lack broad background knowledge and struggle in open-ended domains. The rapid rise of large language models provides an opportunity to overcome these hurdles by leveraging extensive world knowledge and natural language comprehension. The article evaluates how to construct, apply, and benchmark autonomous agents powered by large language models, establishing a unified foundation for researchers and decision-makers navigating this emerging technology.
To address this objective, the article conducts a systematic literature review analyzing over one hundred recent studies. It synthesizes these works to create comprehensive taxonomies across three core dimensions: architectural construction and capability acquisition, practical applications across diverse fields, and subjective and objective evaluation strategies.
Key findings show that effective autonomous agents depend on a unified four-part architecture: a profiling module to establish identity, a hybrid memory module combining immediate context and long-term storage, a planning module that breaks down complex tasks, and an action module that executes decisions directly or via external tools. The synthesis also finds that agents improve performance through two main pathways: model fine-tuning on annotated or real-world data, and engineering strategies such as structured prompt design, multi-agent debate, and iterative trial-and-error without model fine-tuning. Across applications, language model agents demonstrate substantial value in social science simulations, experimental planning in natural sciences, and automated software development and robotics. Finally, evaluating these agents requires combining subjective human review with structured, objective benchmarks that measure goal completion rates, behavioral similarity to humans, and operational efficiency.
These findings suggest that autonomous agents can automate complex end-to-end workflows and safely simulate human behaviors, potentially lowering development costs and accelerating research across scientific and engineering disciplines. However, several operational and safety risks remain, including model hallucinations producing incorrect code or guidance, prompt brittleness across different underlying models, and high computational latency caused by iterative reasoning loops.
Organizations evaluating or deploying language model agents should prioritize architectures that incorporate closed-loop feedback and tool integration to catch and correct execution errors automatically. For complex simulations and high-stakes workflows, practitioners should run targeted pilot programs combining automated benchmarks with human oversight to validate accuracy, alignment, and safety before broad deployment.
Because the field remains in its early stages, confidence in agent autonomy should be tempered by existing limitations, including context window constraints, unpredictable role-playing fidelity, and inference latency. Decision-makers should treat these systems as assistive tools requiring ongoing monitoring until more robust prompt standards, alignment controls, and domain-specific benchmarks are established.
- Paper: Generative Agents: Interactive Simulacra of Human Behavior, Joon Sung Park et al. (2023). This 2023 paper introduces generative agents and architectures for persistent memory and planning, providing the foundational simulation paradigms reviewed by the source.
- Paper: AutoGen: Enabling Next-Gen LLM Applications via Multi-Agent Conversation, Qingyun Wu et al. (2023). This 2023 paper establishes multi-agent conversation frameworks that directly form the core multi-agent coordination architectures analyzed in the source survey.
- Paper: Agentic Reasoning for Large Language Models, Tianxin Wei et al. (2026). This 2026 survey directly extends the source by categorizing subsequent advancements in agentic reasoning, single-agent skills, and self-evolving mechanisms through 2025.
- Paper: Toward Efficient Agents: Memory, Tool learning, and Planning, Xiaofang Yang et al. (2026). This 2026 work builds upon the source by evaluating the computational efficiency, memory management, and tool learning strategies of modern LLM agents.
- Paper: The Latent Space: Foundation, Evolution, Mechanism, Ability, and Outlook, Xinlei Yu et al. (2026). This 2026 survey extends the source's holistic agent review by exploring continuous latent space representations as a foundational mechanism for agentic computation and planning.
- Paper: Agentic Context Engineering: Evolving Contexts for Self-Improving Language Models, Qizheng Zhang et al. (2026). This 2026 study continues the source's work on agent construction by introducing Agentic Context Engineering to evolve self-improving playbooks for language agents.
- Paper: GLM-5: from Vibe Coding to Agentic Engineering, GLM-5-Team et al. (2026). This 2026 multi-author release extends the source by detailing the practical transition of foundation models from prompt-guided generation to fully autonomous agentic engineering.
