ChatGPT can now learn your writing style from your Gmail

If you are on the free plan and cannot switch it on, there is a plain workaround that gets most of the way. Here is how the real feature works, and the note you can build yourself in the meantime.

ChatGPT's Writing Style feature, which runs in ChatGPT Work, learns how you write from your connected Gmail, Google Drive, Slack and SharePoint, then matches your tone in new drafts. It is in testing with a small group of paid users, and you switch it on by connecting each app yourself.

What it actually does

Instead of you describing how you write, ChatGPT reads how you already write. Connect your everyday apps and it looks at your real emails, messages and files, picks up your habits, your usual phrases, your sign-off, the way you capitalise things, and carries them into whatever it drafts for you next (OpenAI's announcement).

The apps it can read are Gmail, Google Drive, Slack and SharePoint. The idea is that the writing it hands back sounds like you wrote it.

The catch most headlines skip

This runs in ChatGPT Work, the workspace that comes with paid plans, set up on the web. As of 7 September 2026, OpenAI said it was testing Writing Style with a small group of users, with no date for a wider rollout (BleepingComputer's report).

Nothing suggests it is coming to the free version. It is also opt-in: you connect Gmail, Drive, Slack and SharePoint yourself, one at a time. So it is real, but it is narrower than the headlines make it sound.

Not sure whether you have it? A quick rule: if you are on free ChatGPT, or you have not seen a Writing Style option in ChatGPT Work, treat this as a look-ahead rather than a switch you can flip today.

Should you connect your inbox?

Worth a pause before you switch it on. Connecting these apps gives an AI reading access to real emails and files, and on a work account that is your employer's data as well as yours, so it is a workspace and admin question as much as a personal one.

If your ChatGPT Work seat is managed by your company, connecting an app at all may be your admin's call, so check before assuming it is yours to switch on. If you handle anything confidential, client emails, HR or salary threads, unreleased plans, think about that first. Connect only the apps you are genuinely comfortable letting it read.

The free way to get the same result

Here is the useful part for everyone still on Free or Plus, or anyone who would rather not wire their inbox to an AI. Underneath, this feature is just gathering samples of your writing automatically, and you can hand it those samples yourself.

The prompt below does the same job from the same place your inbox would: paste it into Claude or ChatGPT, drop in five real emails from your Sent folder, and it studies them, names the pattern back to you, and writes a short reusable note, with nothing connected.

You are my Style Detective. Your one job is to work out how I actually write from my real sent emails, then hand me back a short profile I can reuse, so any AI can draft in my voice with nothing connected to my inbox. This is the free version of the connected feature: it learns from the same place, my real emails, except I paste them in myself. A good read copies the move, the rhythm and the habits, never a handful of my favourite words. Work in three steps and stop where I tell you.

STEP 1, GET REAL SAMPLES. Before you read anything, ask me to open my Gmail Sent folder and paste in five real sent emails, spread across different kinds of message, the ones I actually sent rather than tidied-up ones. Ask me to spread the range if I can: one to a colleague, one to a friend or family member, one where I was chasing or pushing for something. If I can only find two or three, tell me that is enough to start and work with those. Then wait for me to paste. Do not analyse writing I have not given you, and never invent a sample to fill a gap.

STEP 2, STUDY AND NAME THE PATTERN. Read every sample closely and tell me back, in plain terms, what is true of how I write. For each point below, quote a real line from my emails, so I can see you are reading me rather than guessing:
- SENTENCE LENGTH AND RHYTHM: short and clipped, long and flowing, or a mix, and where it shifts.
- HOW I OPEN: do I dive straight into the point, greet by first name, ask a question, skip the greeting.
- HOW I SIGN OFF: my exact closing and signature, word for word.
- PUNCTUATION HABITS: commas where a stiffer writer uses full stops, dashes, brackets, lower case, whether I ever use an exclamation mark.
- WORDS I REACH FOR: the plain, real words I actually type.
- WORDS I CLEARLY AVOID: the fancier or stiffer ones that never show up.
- REGISTER SHIFTS: how much I change between a work email and a message to someone I know.
If two samples disagree, say so, and tell me which one feels more like my default.

STEP 3, WRITE THE PROFILE. Turn what you found into a short reusable note in this shape:
- WHO I AM: one line, only from what I have told you. Ask me if you do not know.
- WHO I WRITE FOR: ask me if the samples do not make it obvious.
- HOW I WRITE: six to eight plain rules drawn straight from the samples, each one specific enough to hand to any AI. "Open with the point, no greeting" is a rule. "Be professional" is not.
- WORDS I USE, and WORDS I NEVER USE: two short lists, pulled from the samples.
- MY OPENINGS AND SIGN-OFFS: the exact ones, so a draft starts and ends like me.
- A TEST LINE: write one new sentence in my voice on a topic I pick, so I can check the note holds.

RULES
- Build the note only from my samples and what I tell you. Never invent a fact about me, a job, a name or a detail I did not give you. Leave a clear [gap] instead.
- Keep every rule plain enough to follow on its own. If a rule needs me to already know my voice to make sense of it, it is too vague, so tighten it.
- Copy the move, not the one-off. If a phrase showed up only once, do not turn it into a rule.
- When you finish, ask me whether the test line sounds like me. If I say no, ask what is off and fix that part. Do not start the whole thing over.

Once I am happy, tell me to paste this note into my custom instructions, or save it as an about.md file, so every future chat writes in my voice with nothing connected.

If the note comes back with vague rules like "clear and professional", your samples were probably too few or too polished. That happens when all five emails come from the same tidy work thread, so it only ever sees one register.

Pull a couple of messier real ones from your Sent folder, the quick reply you fired off rather than the one you laboured over, and tell it the test line still sounds like a chatbot. It will tighten the rules and quote the lines it drew them from.

The note on its own does nothing until you point it at a draft. Here is the second half: paste this with your note underneath whenever you want something written in your voice.

You are my ghostwriter. You have my style note below, and your job is to write the thing I ask for so it sounds like I wrote it on a normal day, not like a polished, neutral AI. That smoothed-out voice is the exact thing I am trying to avoid, so when you are unsure, go plainer and shorter, because that is nearly always the way back to how I really sound.

HOW TO WORK
- Match the sample, not an average. Pick the closest register in my note, the work email or the message to someone I know, and pin the whole draft to that one. Do not blend all of it into a neutral middle.
- Copy the move, not my favourite words. Match my rhythm, my sentence length, my openings and my sign-off. Do not stuff in a word I use just to prove you read the note.
- If I ask for something my note does not cover, say so in one line and write it in my closest register, rather than inventing a new voice for it.
- If you are missing a fact you need, leave a clear [gap] for me rather than filling it in. Never invent a name, a number, a date or a detail.
- Read it back as if saying it aloud before you hand it over. Cut any warm-up before the point, any summary after it, and any word from my never-use list.

When you finish, give me the draft only, ready to send, with no preamble. Then name the single line you are least sure sounds like me, so I know where to look before it goes out.

WHAT TO WRITE
[paste the email, message, caption or topic here]

MY STYLE NOTE
[paste the note the first prompt wrote for you]

Two more places to put your writing samples, once you have the note:

One difference to know: the connected feature works in the background, while a file only helps when the AI can actually see it. Save it in your custom instructions if you want it on every chat, rather than only when you remember to paste it.

The honest take

It is a genuinely useful idea and clearly where things are heading. If you have ChatGPT Work and you are happy connecting your apps, it saves you the job of gathering samples, and because it stays connected it keeps up as your writing changes.

The do-it-yourself file is a snapshot of the emails you paste in, so it captures how you write today and stays fixed until you refresh it yourself. If you are on Free or Plus, or would rather keep your inbox to yourself, that snapshot still gets you most of the way there without handing anything over.

Questions people ask

Is there a ChatGPT for Gmail?

ChatGPT can connect to Gmail in ChatGPT Work, and its Writing Style feature learns how you write from it. As of 7 September 2026, OpenAI was testing Writing Style with a small group of paid users.

Can ChatGPT write my emails?

Yes, it drafts them, and Writing Style is meant to make those drafts sound like you by learning from your connected Gmail. On free ChatGPT, paste a few of your own emails and a short note on your voice instead.

Can I use this on free ChatGPT?

Not as things stand. Writing Style runs in ChatGPT Work, which comes with paid plans, and as of 7 September 2026 OpenAI was still testing it with a small group of users. There is no word on a free version.

Does it read my personal email?

It reads whichever apps you choose to connect, from Gmail, Drive, Slack and SharePoint. If your ChatGPT Work seat comes through your employer, that usually means your work accounts. You connect each one yourself, so only connect what you are comfortable letting an AI read.

What is the free way to make AI sound like me?

Give it your own writing samples instead of connecting your inbox. Paste a few real things you have written and a short note on your voice into an about.md file or your custom instructions. It works on Free or Plus, in Claude or ChatGPT, and nothing gets connected.