Every AI Model Actually Explained (And Which One You Should Use)

Every AI Model Actually Explained (And Which One You Should Use)

Photo of author, Vertech EditorialVertech Editorial Mar 2, 2026 7 min read
Photo of author, Vertech Editorial

Vertech Editorial

Mar 2, 2026

ChatGPT, Gemini, Claude, Perplexity, DeepSeek - there are too many now. Here's a plain-English breakdown of what each one actually does well so you can stop switching.

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Every AI Model Explained

There are too many AI tools right now. A new one drops every few weeks, everyone says theirs is the best, and you're left not knowing which tab to open. The honest answer is that most of them are good - just at different things. Here's how to actually sort through them.

You don't need to master all of them. You need to know which one fits your situation. That's it.

There Are Too Many AI Models and Nobody Explains Them Clearly

The confusion usually comes from one thing: AI companies describe their products the same way. Everything is "intelligent," "powerful," and "helpful." Those words mean nothing. What matters is the specific task you're trying to do.

Let's cut through it. Here's what each major model is actually built for, in plain English.

The Big Three (And What Each One Actually Does Well)

Model Best For Watch Out For Free Plan?
ChatGPT Writing, brainstorming, math, coding, general tasks Can confidently make up facts Yes
Gemini Google Docs, Gmail, Sheets - anything in Google's world Weaker for deep reasoning tasks Yes
Claude Long documents, nuanced writing, reading heavy PDFs Limited free plan, no image generation Limited
Perplexity Research with real sources, live news, fact-checking Not ideal for creative writing Yes
DeepSeek Technical reasoning, math, step-by-step logic Less polished for everyday writing Yes

The Specialists Worth Knowing About

For Research

Perplexity pulls live sources. Use it when you need citations or up-to-date information.

For Writing

Claude handles long-form writing and complex documents better than most. Great for essays and reports.

For Math & Coding

DeepSeek and ChatGPT both shine here. DeepSeek shows its work step-by-step.

How to Stop Switching AI Apps and Pick One Default

Most students waste time jumping between AI tools instead of getting good at one. Pick a default and stick with it for everyday tasks. Then, when a specific need comes up - live sources, a huge document, a tough math problem - switch to the right specialist.

If you're in Google Docs all day, your default is Gemini. If you write a lot of essays, Claude is worth the free tier limit. If you do a bit of everything, ChatGPT is your baseline.

The simplest default rule

Use the AI built into the tools you already open every day. If you live in Google Docs, use Gemini. If you write code in VS Code, use Copilot. Switching tools costs more time than it saves.

Which AI Should You Start With?

If you've never used an AI tool before, start with ChatGPT. It's the most versatile, has a strong free tier, and the quality of its outputs across writing, math, and research is good enough for most student tasks.

Once you hit a situation where it falls short - like needing real-time sources, or uploading a 40-page PDF - that's when you add a specialist. You don't need all of them on day one.

Frequently Asked Questions

Is ChatGPT still the best AI overall?
For most general use? Yes, still. But "best" depends entirely on your task. ChatGPT is the most well-rounded, not the top performer in every category.
Do I need to pay for any of these to get real value?
No. The free tiers of ChatGPT, Gemini, and Perplexity are genuinely useful for students. You hit limits faster on the free plans, but for day-to-day studying, you don't need to pay.