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What Is an AI Agent?

  • Writer: Ian Chard
    Ian Chard
  • Apr 30
  • 2 min read

Updated: May 9

In the rapidly evolving field of artificial intelligence, the term "AI agent" is gaining prominence. But what exactly does it mean?​


Understanding AI Agents


An AI agent refers to a system that leverages a Large Language Model (LLM) to autonomously make decisions, execute tasks, and interact with its environment.


Unlike traditional software programs that follow predefined instructions, AI agents can reason, adapt, and determine the best course of action based on the context.​


Perspectives from Leading AI Organizations


  • OpenAI: OpenAI describes agents as automated systems capable of independently completing tasks for users. Their development of tools like the Responses API aims to facilitate the creation of such agents, enabling more dynamic and context-aware interactions. ​

  • Anthropic: Anthropic defines agents as systems where LLMs dynamically direct their own processes and tool usage, maintaining control over how they accomplish tasks. This approach emphasizes the agent's autonomy in decision-making and adaptability to new information. 

  • LangChain: LangChain views agents as systems where the LLM is in control, choosing actions and navigating tools without hard-coded instructions. They highlight the importance of providing the LLM with the appropriate context at each step to build reliable agentic systems. ​


The Spectrum of Agentic Behavior


It's important to note that agentic behavior exists on a spectrum.


Some systems may use LLMs to make simple routing decisions, while others operate with higher degrees of autonomy, managing intricate workflows and adapting to new information in real-time.


Understanding where a system falls on this spectrum is crucial for designing effective AI applications.​


AI agents represent a significant shift in how we design and interact with software systems.


By granting systems the ability to reason and adapt, we open the door to more intelligent and flexible applications.





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