Agent
An agent is a type of AI that handles more complex tasks on its own, without you giving it each step individually. Just tell it the goal and it plans its own way there.
A conventional model like ChatGPT answers one specific prompt. An agent, by contrast, can break a task into smaller parts, think through the process, and make decisions across several steps. It suits more complex tasks, planning, and automation.
Tools that already work with agents include OpenAI Deep Research and more advanced versions of ChatGPT.
Multi-agent
A multi-agent system is one where several AI agents work together at once. Each has its own task, but together they solve one larger problem. They work on their own and still pull in the same direction, much like a team of people.
What does that look like in practice? A multi-agent system could plan a marketing campaign by itself. One agent researches the market, another writes the copy, and a third reviews the results and tunes the strategy in real time.
For now, only a handful of multi-agent systems run in production. Most have not yet reached a level where they can go through extensive user testing, because building them reliably is genuinely hard.
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