Which AI Should You Use? A Map of the Big Names

So you've got the knack for asking well. Good — that's the hard part. But there's a quieter question that stops a lot of people right at the doorstep: which one do you actually open? There's a wall of names out there, every one with an ad swearing it's the smartest, the fastest, the best. ChatGPT? Claude? The one a coworker won't stop talking about? And if you've already settled on one you open every day, this map is still for you — it tells you what the others are for, and whether the grass is actually greener.

Here's the relief, and I want to lead with it: this is a map, not a test. You're not picking a soulmate. You're picking a door.

The part nobody tells you

Most of these tools do the same handful of things — write, summarize, explain, brainstorm, answer questions. They differ around the edges in tone and in where they live, but the core is remarkably similar. Once you've learned to ask well, that skill travels with you to almost any of them.

So read what follows as a tour, not a ranking. I'll give you one line on each — what it's known for — and that's genuinely all you need.

The names you'll hear first

Remember the doorway and who's home? Each of these is a doorway to a powerful language model behind it.

• ChatGPT (from OpenAI) is the one almost everyone has heard of — the all-rounder most people try first. If you want a safe default, it's a perfectly good one.
• Claude (from Anthropic) is known for thoughtful writing, working patiently through long documents, and a company that puts safety front and center. (Full disclosure: this site is built around Claude — so take that as the house's pick, and judge for yourself.)
• Perplexity is its own flavor: think of it as AI search. It answers your question and shows you the sources it pulled from, with links you can click to check. Reach for it when you want answers you can trace back. And given everything so far about confident answers that can be wrong, an assistant that shows its receipts is worth remembering — it'll come back when we get to keeping AI honest.

The one that's probably already next to you

Here's a shortcut that saves a lot of dithering: several of these live inside tools you already use. The easiest assistant is often the one sitting right there.

• Gemini is Google's, woven into Gmail, Docs, and Sheets. If you live in Google's apps, it's already in the room.
• Copilot is Microsoft's, built into Word, Excel, and Outlook. The natural pick if your day runs on Office.
• Grok lives inside X (formerly Twitter), leans casual and cheeky, and stays plugged into what's being posted right now.
• Meta AI shows up inside WhatsApp, Instagram, and Facebook — handy if that's where you already spend your time.

One thing before you grab whatever's closest: at work, this choice may already be made for you. Many companies bless one official assistant — often the one built into their office suite — and that's the one to use for anything involving work or client material. Keep personal accounts for the personal stuff. There's a later lesson on keeping things safe more broadly; this is just the tool-choice half of it.

You'll also hear a few more thrown around — DeepSeek, known for being low-cost and sharp at reasoning, and Mistral, a European maker focused on privacy. Good to recognize the names. Not something you need on day one.

"One subscription, many models"

One more thing exists, and then I'll let you go. There are services — OpenRouter and Abacus's ChatLLM are two — that sit on top of many of these and let you switch between models from a single app, on a single bill. Useful once you have favorites and want to flip between them.

Speaking of which — here's the whole map on one card:

A quick word on paying

The names get all the attention; the money is simpler than it looks. For everyday use, you pay one flat monthly fee — like any other subscription — and most of the big assistants even let you start free, with some limits, so you can kick the tires before paying anything.

You'll also see a pay-as-you-go option (it goes by the API, billed in tiny units called tokens). Don't worry about it. That's the plumbing developers use to wire AI into their own software — not the door you walk through. We'll come back to those words later; for now, "flat monthly fee" is the whole story.

So, which one?

That's the map. Pick a door and walk through it. There's just one more thing worth sorting out before you do — the question everyone asks the moment they find a tool they like: what's this actually going to cost me? That's next.