InfiAgent: Self-Evolving Pyramid Agent Framework for Infinite Scenarios

Large Language Model (LLM) agents have demonstrated remarkable capabilities in organizing and executing complex tasks, and many such agents are now widely used in various application scenarios. However, developing these agents requires carefully designed workflows, carefully crafted prompts, and iterative tuning, which requires LLM techniques and domain-specific expertise. These handcrafted limitations hinder the scalability and cost-effectiveness of LLM agents across a wide range of industries. To address these challenges, we propose InfiA-gent, a Pyramid-like DAG-based Multi-Agent Framework that can be applied to infinite scenarios, which introduces several key innovations: a generalized "agent-as-a-tool" mechanism that automatically decomposes complex agents into hierarchical multi-agent systems; a dual-audit mechanism that ensures the quality and stability of task completion; an agent routing function that enables efficient task-agent matching; and an agent self-evolution mechanism that autonomously restructures the agent DAG based on new tasks, poor performance, or optimization opportunities. Furthermore, InfiAgent's atomic task design supports agent parallelism, significantly improving execution efficiency. Evaluations on multiple benchmarks demonstrate that InfiAgent achieves 9.9% higher performance compared to ADAS (similar auto-generated agent framework), while a case study of the AI research assistant InfiHelper shows that it generates scientific papers that have received recognition from human reviewers at top-tier IEEE conferences. The rapid development of large-scale language models (LLMs) has ushered in a new era of intelligent automation (Naveed et al., 2025; Tran et al., 2025), with agent-based systems demonstrating remarkable capabilities in organizing and executing complex tasks across domains. From scientific research and software development to creative content generation and business process automation, LLM agents are transforming how we solve problems at scale. However, the development and deployment of these agents face significant challenges, limiting their widespread adoption and effectiveness. Current approaches to building LLM agents rely heavily on carefully designed workflows, carefully crafted prompts, and extensive iterative tuning--processes that require deep LLM expertise and domain-specific knowledge (V eeramachaneni, 2025; Guo et al., 2024; Annam et al., 2025; Schick et al., 2023). This reliance on handcrafted solutions creates a fundamental scalability barrier: each new application requires significant manual intervention, making it difficult to rapidly deploy agents across diverse industries and use cases.