An AI Agent is an autonomous software entity that perceives its environment through inputs (text, data, signals), reasons using a language model, executes actions via tools and APIs, and pursues a goal over multiple steps — with or without human intervention at each step, depending on its configuration.
| Dimension | Rule-based Automation | Chatbot | AI Agent |
|---|---|---|---|
| Decision logic | Fixed if/then rules | Intent matching | LLM reasoning over context |
| Multi-step tasks | No — single actions | Limited turns | Yes — plans sequences |
| Tool use | Hardcoded integrations | Limited | Dynamic, any API |
| Handles ambiguity | Fails or routes | Partially | Yes — reasons through |
| Human oversight | By exception only | Human triggers | Configurable gates |
| Learns from feedback | No | Retraining needed | Yes — RLHF, fine-tuning |