ELI5: What are the different types of AI agents?

There are seven main types of AI agents, like smart helpers that do different jobs in your daily life, from turning on lights to planning your day.

Imagine AI agents as robot friends with brains that get bigger and smarter step by step. Here's how they work, like toys in your playroom:

• Simple reflex agents act super fast on what they see right now, no thinking about before. Like a light switch that turns on when it's dark—your nightlight does this without remembering yesterday.[1][3]
• Model-based reflex agents keep a tiny map in their head of the room. Your roomba vacuum remembers where the couch is, even if it's dusty, so it doesn't bump into it.[1][2]
• Goal-based agents pick the best path to finish a job. Like your GPS saying "turn left to get to school on time," planning the quickest way.[1][4]
• Utility-based agents choose the happiest or best choice when options mix good and bad. A shopping app picks the cheapest snacks that taste yummy too, balancing money and fun.[1][4]
• Learning agents get better by practicing, like you learning bike riding. Netflix watches what cartoons you like and suggests more, improving each time.[1][4]
• Multi-agent systems are teams of agents working together. Smart home where lights, music, and AC chat to make dinner cozy without you asking.[1]
• Hierarchical agents are bosses with helper agents under them for big jobs. Your mom's phone agent books dentist, reminds you, and updates the calendar—all layered like a cake.[1][2]