ChatGPT or Gemini: Which Is Better for Each Task

You have asked someone this and got back an opinion, not an answer. “I use ChatGPT.” “I prefer Gemini.” “Claude writes better.” Everybody has a favourite, almost nobody explains why, and you are still sitting there with four tabs open and no idea which one to close.

This is lesson 3 of the course and it does not crown a winner. By the end you will have a rule you can apply on the spot, task by task: writing, studying, spreadsheets, images, reading a code error. About 11 minutes of reading, and at the end there is a 15 minute test that compares the tools using your own material, which is the only comparison worth anything. What follows reflects August 2026.

The golden rule: pick by task, not by brand

For most of what you are going to ask, all four deliver. Writing an email, summarising a text, explaining a topic, suggesting a gift: the gap between the tools on those jobs is smaller than the gap between a well written request and a lazy one, which was the subject of lesson 2.

What really changes things is something else: the best AI is the one already sitting next to your files. If your life runs on Gmail and Google Drive, the tool that can see those folders beats any other that makes you download, rename and upload the file again. If your work is corporate Word and Excel, the same maths applies on the other side. That decides more than any test score.

Which one to open for each task

The table is the summary of this article. The rest of the text explains each row and shows where it breaks down.

Notice that no row says “the best AI”. It says “the first one I would open”. If the answer does not help, the same prompt works in the others: a Meeting Summary or a Cash Flow and Your Hourly Rate come back similar in all four. Switching tabs costs ten seconds and is sometimes the fastest fix there is.

ChatGPT: the default when you are starting out

It is the most complete one in a single place. Text, images, file reading, voice and search all live in the same window, and that matters more than it sounds for anyone in their first month: you learn one interface instead of six.

It is where I would send someone to practise. Explain It Like I Am 12 shows on the very first try what a well defined role does to an answer, using a topic you picked and can judge yourself.

Its weakness is the same as its strength: with that much packed in, you can use it for months and never find half of the features.

Gemini: when your life already lives inside Google

Gemini’s advantage is not that it answers better. It is that it sits inside Gmail, Docs and Drive, where your things already are. Asking “summarise this thread” without leaving your inbox removes the step where most people give up, which is finding, downloading and uploading the file.

That makes it the natural pick for studying from your own material. Drop in the syllabus and work out whether the exam is worth it at all with Is This Public Sector Exam Worth Sitting?, organise the term with Back to School Without the Stress, and use Private Tutor for Any Subject on whatever the reading left unclear.

It is also the shortest route to images, because Google’s image generation sits right there.

Claude: long text and honest editing

Claude is the favourite of people who write for a living. It carries a whole document without forgetting the beginning halfway through, and it has less of that irritating habit of praising your text before changing a comma.

Use it when the material is long or when you want real criticism. The Kind Proofreader That Explains Your Mistakes pays off more here because the reasoning comes with the correction, Describe CV Achievements With Results only works if the tool is willing to be blunt, and for dense legal wording A Simple, Safe Service Contract is the quickest way to see who handles heavy text best.

On the other hand, it has the fewest features around it: if you want images, voice and integrations, this is not the place.

Copilot: when the job is Word, Excel and Outlook

If the company runs on Microsoft, Copilot is already inside the programs you use all day. The logic is identical to Gemini’s, just on the other side: it wins by being where the file is, not by answering better.

For anyone who lives in spreadsheets, it is the difference between describing a column and simply pointing at it. Cash Flow and Your Hourly Rate works either way, but pasting the finished formula into the right cell is much faster when the AI is already in the sheet.

Outside the Office suite it loses its point. And here is the warning nobody gives you: if the account belongs to your employer, what you type there may fall under company policy. Treat it like work email, not like a private chat.

For images, the maths is different

On text the four are nearly tied. On images they are not. One question decides it: does the image start from a photo of you, or from nothing?

When it starts from your photo, what matters is keeping the face, and that is where Google’s image generation stands out today. That is the case with Professional LinkedIn Headshot With AI and with Restore a Torn and Creased Photo With AI, where a wrong result is not ugly, it is somebody else.

When the image starts from nothing, the difference between tools is style rather than accuracy, and the prompt matters more than the brand. That is the subject of the guide to image prompts.

When switching tools fixes nothing

This is the section comparison articles never write, and it is the most useful one.

• A generic answer. Almost always missing context from you, not missing intelligence from it. No tool guesses your job title, your budget or what you already tried.
• Wrong arithmetic. All of them get sums wrong with the same confidence. Switching AI does not fix that; checking on a calculator does.
• An invented fact. Also common to all four. The way to reduce it is to ask where to verify and then verify, in any of them.
• Text that reads like AI. That is the request asking for generic text. The fix comes in the second message, not in a new tab.

One limit that applies to all four: Understand Your Medicine Leaflet in Plain Words is there to help you walk into the appointment better prepared, not to replace the doctor. No tool changes that.

A 15 minute test, with your own material

Comparison articles are built on somebody else’s example. The only test that counts is yours. Open two tabs, run the same prompt in both and compare.

1. Take a real text of yours, ideally a long one, and run The Kind Proofreader That Explains Your Mistakes in both. See which one explains the reason for a change instead of just rewriting.
2. Take a topic that keeps stalling you and use Private Tutor for Any Subject. Here you are measuring teaching, not sophistication.
3. Upload something heavy, a 30 page PDF, and ask for the analysis in Is This Public Sector Exam Worth Sitting?. That is where the gap between them shows up fastest.
4. If you are learning a language, run one round of A Language for Work and Meetings in each and keep the one that corrects you without derailing the conversation.
5. Finish with something visual: generate Professional LinkedIn Headshot With AI and compare the face to your selfie, not to your expectations.

At the end you will not have a champion. You will have two favourites for different things, which is the correct result.

Quick questions

ChatGPT or Gemini: which is better?

For writing and chatting they are tied in practice. Gemini wins when the material already sits in Gmail, Docs or Drive, because you upload nothing. ChatGPT wins for anyone who wants everything in one place and is starting now.

Which free AI is best?

All four have a free plan that covers everyday use. The free limit bites first on large files and heavy repeated use. If you hit it every week, then paying makes sense, and it makes sense in the one where your files already are.

Do I need more than one?

You do not need to, but people who use two usually get more done. The common pattern is one for quick daily work and another for long text. The prompt is the same in both, so there is no relearning cost.

Which AI is best for studying?

The one that can read your material. If your notes are in Drive, Gemini. If they are loose on your computer, ChatGPT and Gemini are equally fine. What changes the result is asking for a summary, a schedule and flashcards instead of asking it to “help me study”.

Which AI is best for creating images?

If the image starts from a photo of you, Google’s image generation preserves the face best today. If it starts from nothing, the choice is about style, and prompt quality decides the result.

Will switching tools improve a bad answer?

Rarely. Most bad answers come from a request with no context, no output format and no constraint. Fix the request first. If it is still bad after that, then switching makes sense.

What comes next

You can now decide without borrowing anyone’s opinion: ask where your files are, check whether the job is long text or images, and open the matching tab. For whatever doubt is left, test it with your own material in 15 minutes.

The next lesson is about what you can do without paying anything, which is the question that always follows this one. In the meantime, the fastest way to practise is to take a ready prompt and adapt it: start with the text prompts or the image prompts, and come back to the course when you want the next lesson.