30-second answer: pick ChatGPT to start, Claude to write, Gemini if you live in Google, DeepSeek for code, Copilot if you’re on Windows. All free. All good enough for most people’s daily use.
This guide is the result of months testing all 5 in my actual work — writing, research, spreadsheets, code, quick replies. It’s not a comparison based on release notes; it’s what I noticed while actually using each one.
Before deciding, check the direct comparison below — you might already use one of the five for the wrong task. Also see our ChatGPT vs Gemini deep-dive.
An important note upfront: all these AIs change from month to month. This article was updated on 2026-07-27, based on real use since January. Some limits you see here may be different by next week. Practical rule: test them yourself before deciding based on any article (including this one).
Direct comparison (30-second version)
| AI | Best for | Free limit (approx.) | Signup? | My vote |
|---|---|---|---|---|
| ChatGPT (free) | General use, getting started | ~40 msgs/3h with GPT-5 | Yes | Best for beginners |
| Google Gemini | Gmail/Docs integration | Generous, few restrictions | Yes | Best free limit |
| Claude (free) | Long text, PDF analysis | ~30 msgs/5h with Sonnet | Yes | Best for writing |
| Copilot | Windows/Edge, search | Generous | No (via Edge) | Best for Windows ninja |
| DeepSeek | Code, math | Practically unlimited | Yes | Best free code AI |
I’ll break down each one below — with the tests I ran and where each one let me down.
ChatGPT: easiest to start
ChatGPT remains the benchmark. It’s the AI most people know — and for good reason: the interface is the friendliest for someone who’s never used AI in their life.
The 2026 free version uses GPT-5 mini by default and unlocks full GPT-5 for a few hours per day. It does everything well — text, code, summarization, translation, image.
My real test: I gave the same prompt “write a polite email declining an event” to all 5 AIs. ChatGPT gave me 3 versions, each with a different tone, without me asking. Clear sign it anticipates what you’ll probably want.
Where ChatGPT let me down: free image generation is heavily limited in 2026 — 5 images per day is common. If your focus is images, use Gemini with Imagen 4 (free, less tight limit) or go paid.
Hidden win: the mobile app is much better than competitors, with voice dictation that recognizes many accents well. I use it 80% on mobile.
Gemini: best if you live in Google
Gemini has an underrated advantage most people don’t know about: native integration with Gmail, Docs, Sheets, Drive, Calendar, and YouTube.
A real case from my day: I ask “summarize Monday’s emails” and it reads my inbox (with my permission). “What are the next 5 events on my calendar?” and it opens Calendar. No other AI in this list does this natively, without hacky integrations.
It also has the most generous free limits of the five. I’ve never hit a block in normal use — I still use Gemini even when others have already cut me off.
Where Gemini let me down: in creative writing, still trails Claude and ChatGPT. It has an “informational” tone you can feel. If you need text with nuance or personality, prefer others.
Hidden win: its Grounding search (real-time web checking) is the best free-tier one on the market. If you need recent facts with sources, Gemini > all others.
Claude: king of writing and PDFs
Claude from Anthropic is the preferred choice for writers, lawyers, and researchers. It’s not hype — it’s results.
The test that made a difference: I threw a 52-page contract PDF into each of the 5 AIs and asked to list risk clauses. Claude was the only one that listed specific clauses with page numbers. The others gave a generic summary.
It analyzes huge PDFs (whole books, complex contracts), writes with nuance the others miss, and is the most honest when it doesn’t know — it says “I don’t know” instead of making things up. That trait alone is worth many “features” of competitors.
Where Claude let me down: no native image generation, the free limit is the shortest (you hit it fast if you use it seriously), and no Google Drive or Gmail integration without a paid plan.
Hidden win: Claude has a feature called Projects (even on free) that lets you save context and files to reuse across chats. I use it to keep a “personal project” where it already knows my drafts.
Copilot: comes with Windows
If you use Windows 11 or the Edge browser, Copilot is already there — dedicated keyboard button on many new laptops.
It’s basically GPT-4 with web access via Bing in a Microsoft interface. Practical advantage: no signup required if you use Edge (Microsoft takes your Windows account behind the scenes).
Where Copilot shines: quick searches with sources. If you want to ask “what are the store hours for X in Denver”, Copilot searches Bing and gives you a link — faster than opening ChatGPT.
Where Copilot let me down: long conversations are weak. It tends to “forget” context after 5-6 turns. Good for quick tasks, bad for ongoing projects.
DeepSeek: coder’s favorite
DeepSeek is Chinese, free, and absurdly good at code and math. No exaggeration.
My test: I threw the same real TypeScript bug at all 5 AIs. DeepSeek and ChatGPT solved it; Claude too; Gemini almost; Copilot froze. But DeepSeek was the fastest and detailed the why of the bug (not just the fix).
In public benchmarks, it ties paid models like GPT-4o. For students and programmers, it’s the best free option on the market — and the limit is practically nonexistent.
Important caveat: being Chinese-owned, evaluate whether it fits your data policy. If you work with sensitive client info, prefer Western alternatives or run local. For personal code, I see no problem.
Hidden win: DeepSeek’s “R1” (reasoning mode) shows you the step-by-step thinking before the answer. Excellent for learning math — you see how a line of reasoning is built.
Which one to pick? My advice by user type
- Beginner, wants one AI for everything → ChatGPT. Friendly interface, no surprises.
- Already use Google (Gmail, Docs) all day → Gemini. The integration becomes magic.
- Heavy writing, lots of reading, PDFs galore → Claude. No competition for serious text.
- Live in Windows/Edge, want quick search → Copilot. It’s already there, use it.
- Programming, studying math or science → DeepSeek. Ties paid, is really free.
Still undecided? A tactic that works: use 2 at the start. One for general tasks (ChatGPT or Gemini) and one specialist (Claude for text or DeepSeek for code). You’ll notice which one you open more — that’s the right one for you.
What I’d open first if I were starting today
If I could reset to zero, knowing none of them: I’d open Gemini first (free, has an app, integrates with what I already use, and the limit is generous). After 3 weeks, I’d test ChatGPT in parallel. After 5 weeks, I’d honestly decide which of the two I open more on my phone without thinking.
The worst move is spending months reading comparisons without testing. The best free AI is the one you open 10 times a day — and only you can find that out by using it.
To go deeper
- ChatGPT vs Gemini: which is better in 2026? — deep comparison of the two main ones
- 10 AI examples in daily life — where AI already is
- What is AI in 5 minutes — for those who’ve never used it
- How to use AI in practice — beginner guide
One-line summary
ChatGPT to start, Claude to write, Gemini for Google, DeepSeek for code, Copilot for Windows — all free, all good.
Written by Harrison Turola, who has been testing AI tools daily since 2022. Last updated: 2026-07-27. Found a limit that changed or a new feature? Write to [email protected] — we update with credit.