The big AI assistants are all good at everyday jobs like writing, explaining and brainstorming. The biggest practical difference is where they live: Copilot is built into Windows and Microsoft apps, Gemini into Android and Google apps, Meta AI into WhatsApp and Instagram. The easiest choice is usually the one built into what you already use.
The app vs. the model
When people say "AI," they mix up two things:
- The app is what you open and type into, like ChatGPT, Copilot or Gemini. It has the buttons, your chat history, voice mode and settings.
- The model is the "brain" behind the app: the large language model that actually writes the answers. Models have version names with letters and numbers (OpenAI's are called "GPT," Google's are also called "Gemini," Anthropic's are called "Claude").
The main assistants, side by side
All of these have a free version and paid plans with higher limits or extra features. Details checked in October 2026; plans and features change often.
| Assistant | Made by | Where you get it | Especially handy if… |
|---|---|---|---|
| ChatGPT | OpenAI | chatgpt.com, iPhone/iPad and Android apps, desktop apps for Windows and Mac | You want a general-purpose helper for writing, questions, voice chat and creating images. |
| Microsoft Copilot | Microsoft | copilot.com, iPhone/iPad and Android apps; comes on new Windows 11 PCs | You use Windows, Edge or Microsoft 365 (Word, Excel, Outlook). Some Office features need a Microsoft 365 subscription. |
| Google Gemini | gemini.google.com, Android (on many phones it's the built-in assistant), iPhone/iPad app | You use an Android phone or Google apps like Gmail, Maps and YouTube. Some features need a paid Google AI plan. | |
| Claude | Anthropic | claude.ai, iPhone/iPad and Android apps, desktop apps for Mac and Windows | You want help with writing or with reading and summarizing long documents you upload. |
| Meta AI | Meta | Built into WhatsApp, Instagram, Facebook and Messenger; also meta.ai and the Meta AI app | You already spend time in WhatsApp or Instagram and want quick answers without another app. Meta says everyday use stays free. |
| Grok | xAI (now part of SpaceX) | grok.com, iPhone/iPad and Android apps, and inside X (formerly Twitter) | You use X and want answers that draw on what people are posting right now. |
We don't rank these and we have no deal with any of them. Every one of them can make mistakes, so double-check anything important.
"Fast" vs. "thinking" modes
Most assistants now let you choose between a quick answer and a slower, more careful one. The names change, but you'll see words like Instant or Fast versus Thinking, Think or Reasoning.
- Fast modes are best for everyday stuff: rewording an email, a recipe idea, a quick explanation.
- Thinking (or "reasoning") modes take extra time to work through a problem step by step before answering. They're better for tricky questions: planning a complicated trip, comparing options, math, or untangling a confusing bill.
For example, as of October 2026 ChatGPT's free plan offers "Instant" for quick answers and "Think" for harder questions, while paid plans add more thinking levels. Gemini similarly offers a "Fast" option and a "Thinking" option.
Why free vs. paid?
Running these models costs the companies real money in computer power. Free versions usually have daily or hourly limits, especially for the heavy stuff (thinking modes, image and video creation, voice, uploading files). Paid plans raise those limits and unlock extras. For most home users, the free versions are plenty to start with. If you do pay, cancel through the same place you signed up (the app store or the company's website).
It's not just text
There are also models that work with other kinds of media, and many assistants now bundle them in:
- Image models create or edit pictures from a description.
- Voice models let you talk out loud and hear a spoken reply (see how to use voice chat).
- Video models generate short video clips from a description.
The same tech that makes fun birthday images can also make convincing fakes. That's one reason to be skeptical of shocking photos, videos or voice messages, especially ones asking for money. See how to spot phishing.
So which one should I pick?
Honestly: for everyday use, the big ones are all good, and none is best at everything. A simple approach:
- Start with what's already built in. Android phone? Try Gemini. Windows PC or Microsoft 365? Try Copilot. Live in WhatsApp? Try Meta AI.
- Or try ChatGPT, the most widely known, if you want a separate app for everything.
- Ask two of them the same question and see which answer style you like. It costs nothing on the free tiers.
- Whatever you pick, check the privacy settings (here's how in ChatGPT) and keep private details out.
Before you rely on any of them
Whichever assistant you pick, the same three habits apply:
- Keep private details out and check the training setting. See Is AI safe? What happens to what you type.
- Check anything important. All of them sometimes invent facts. See why AI makes things up.
- Know the AI in your search results. Google’s AI Overviews use Gemini. See Google’s AI answers, explained.
Parents: see AI, kids and homework.
Sources
- OpenAI: ChatGPT Free Tier FAQ
- Microsoft: Getting started with Microsoft Copilot
- Google: Get started with the Gemini mobile app
- Anthropic: Get started with Claude
- Meta: Introducing Meta One (Meta AI stays free for everyday use)
- xAI: Welcome to Grok
Test yourself: play Prompt Builder or AI or Not?, quick free games.