AI Agent vs LLM

AI Agent vs LLM represents the fundamental distinction between autonomous systems capable of independent action and large language models (LLMs) that primarily generate text responses. While LLMs like GPT-4 excel at natural language understanding and generation through pattern recognition in training data, AI agents incorporate additional capabilities including goal-oriented planning, environment interaction, tool usage, and autonomous decision-making. LLMs function as sophisticated text processors that respond to prompts without maintaining persistent state or executing external actions, whereas AI agents leverage LLMs as reasoning engines while adding memory systems, action execution modules, and feedback loops that enable continuous learning and adaptation. The key difference lies in agency: LLMs provide intelligent responses within conversational contexts, while AI agents proactively pursue objectives through coordinated sequences of actions across multiple systems and environments.