ChatGPT, agents, Claude, n8n: which one do you actually need? (the jargon, in plain language)

Everywhere you look there's another name. ChatGPT, Claude, Copilot, Cowork, agents, Claude Code, n8n, Zapier. It's easy to feel behind before you've even started, as if everyone else got a manual you missed. The good news is that you don't have to learn the words. Almost everything on that list is one of three kinds of tool, and once you can tell them apart, picking the right one for a job becomes simple.

The assistant you talk to

This is ChatGPT or Claude in a chat window, the version most people have tried. You ask, it answers. It's good for quick questions, a first draft of an email, a rough plan, or explaining something you don't understand in plain terms. You stay in the driving seat and it helps you do the work faster. Most people never get past this one, which is fine, but it's also the least powerful of the three.

The coworker you hand work to

This is a real step up. Here you find tools like Cowork, and at the more technical end Claude Code and Codex (versions built for people who write software). You'll also hear the word "agents", which just means an AI that carries out a job of several steps on its own. The difference from the chat box is the whole point: you don't ask it a question, you give it a task, and it works through the steps using your files and your tools. Checking a folder of invoices, sorting documents, drafting a batch of replies. You hand over the job and then check the result, the same as you would with a junior colleague.

The wiring between your tools

The third kind has no conversation at all. Tools like Zapier and n8n (both are tools that connect your other software to each other) let you set up a rule once, and from then on they quietly move things from one system to another in the background. A new form gets filled in, so a row appears in your spreadsheet and a confirmation email goes out, every single time, exactly the same. There's no AI thinking involved, and that's deliberate. As I wrote a couple of weeks ago, for jobs that must come out identical every time you want a fixed rule, not a creative one.

How to choose

You don't need to memorise any of those product names. You just need to ask one thing about the task in front of you: do I want to think something through, hand over a job, or have something happen automatically every time? If you want to think, reach for the assistant. If you want to hand over real work, reach for the coworker. If you want something to happen the same way without you, reach for the wiring.

Most real setups end up using a mix of all three, and that's exactly right. The skill isn't knowing the jargon. It's looking at a task and knowing which of the three it belongs to.