An AI agent is a language model wrapped in a loop that plans, calls tools and iterates toward a goal across many steps. Five components make one up. A model that picks the next action, a harness that runs the loop, tools that reach outside the model, memory that carries state, and a trajectory, the record of the whole run. Originally published at overmindlab.ai . An agent has a model, loop, tools and memory. In 2024, most AI products were chatbots. A single LLM inference call, one ...