How to stop AI writing sounding like AI
To make AI writing sound human, give the tool a few samples of your own writing to copy, then delete the stock phrases and tidy patterns that give it away.
Most people can spot an AI-written email now, even if they couldn’t say why. It thanks you for reaching out. It hopes you are well. It offers three neatly balanced reasons where one would do, and it closes by saying it looks forward to hearing from you. Nothing in it is wrong. It just doesn’t sound like anyone in particular, and a customer who notices starts to wonder what else you didn’t do yourself.
The fix needs no special tool. It comes down to two habits: show the AI how you write before it starts, and know what to cut once it has finished.
Why does AI writing sound robotic?
Left to itself, an AI tool writes in the most average voice it can find. It has learned from an enormous amount of published text, and with no other instruction it produces something polite and safe that could have come from any company in any country. It also likes words that sound important, it sums up what it has just said, and it stays relentlessly upbeat, which reads oddly in a message about a late delivery or an overdue invoice. None of that is permanent. The tool simply hasn’t been shown how you write.
How do you get AI to match your tone of voice?
Paste in three or four things you have written yourself and tell the tool to match them. Real emails you sent to customers are ideal, because they show how you open, how long your sentences run, how you sign off and how formal you are with people you know. This one step does more for your AI tone of voice than any amount of clever wording in the request.
A prompt along these lines works in ChatGPT, Claude, Copilot or Gemini:
“Here are four emails I wrote to customers. Study how I write: sentence length, how I open and close, the words I use and the ones I don’t. Then draft a reply to the message below in the same voice. Keep it shorter than you think it should be.”
Pick samples that sound like you on a good day, and if you write differently to suppliers than to customers, keep a set for each. Most of these tools let you save standing instructions, or set up a project with files attached, so you do this once and every later draft starts from your voice. The basics of a prompt that gets a usable first draft are in the post on writing AI prompts that actually work.
Two more instructions are worth saving alongside the samples. Say who is reading, because “a builder I’ve worked with for ten years” should get a very different email from “a new customer who has complained twice”. And give it a short list of words you never use. It will mostly listen.
What does the difference look like?
Say you run a small garage in Mallow, and a customer emails to ask whether her car will be ready on Thursday. Left alone, a tool might write:
“Thank you for reaching out! I hope this message finds you well. I wanted to provide you with an update regarding your vehicle. Our team is working diligently to ensure a seamless and timely service, and we anticipate it will be ready on Thursday. Please don’t hesitate to contact us if you have any further questions.”
Given four of your old emails and told to keep it short, the same tool is far more likely to write something like:
“Hi Mary, yes, Thursday’s fine. I’ll text you when it’s done, probably after lunch. Tom”
Same facts, and only one of them sounds like a garage. If you want a reason in there (the part arrived this morning), give it the reason yourself. AI will happily invent one to fill a gap, so check that every fact in a draft is one you supplied.
How to edit AI content: the tells to delete
Even with good samples, a draft will carry some tells. Editing AI content is mostly deleting, and these are worth hunting for:
- Openers that say nothing. “I hope this email finds you well,” “Thank you for reaching out,” “Great question.” Start with the answer instead.
- Puffed-up words. Leverage, robust, seamless, elevate, unlock, comprehensive, delve. If you wouldn’t say it across a counter, cut it.
- Everything in threes. “Fast, friendly and reliable.” If only two are true, keep two.
- “Not just X, but Y.” A sentence that knocks down a claim nobody made. Just say Y.
- The recap at the end. “In summary”, or a last line that repeats the email. They have just read it.
- Long dashes in every paragraph. These have become one of the best-known tells. A comma or a full stop does the same job.
- Vague authority. “Studies show” or “experts agree” with nothing behind it. Find the source or delete the claim.
Listen to the rhythm as well. AI writes sentences of much the same length, one after another, like fence posts. Break a long one in two, or let a short one stand alone.
Can you just ask the AI to sound more human?
You can, and it helps a little, but on its own it tends to swap one set of habits for another. Ask for “more human” and suddenly every message starts with “Honestly,” or carries a forced joke. Specific follow-ups work better: “cut this by a third”, “remove the first and last sentences”, “use plainer words”, or “rewrite this the way you’d say it on the phone”.
Be wary of the “AI humaniser” websites that promise to make text undetectable. They mostly shuffle words about, and the result can read worse than what went in. What your customer notices is whether the email sounds like someone wrote it, and a word shuffler does nothing for that.
Does all AI writing need this much editing?
No. Nobody minds if internal notes or a summary for your own eyes read a bit flat, and polishing them wastes the time AI was supposed to save.
The editing matters where a customer reads it with your name on it. Replies to enquiries and complaints, quotes, your website, social posts and responses to reviews are all worth two minutes every time. A simple test: read it out loud once before it goes. Anything you would stumble over, or would never actually say, gets changed.
Email is where most owners feel this first, which is why the post on taming your inbox with AI goes further into getting replies drafted in your own voice.
If you’d like a hand working out which of your writing is worth giving to AI, and setting it up so the drafts sound like you, the AI Assessment is where I’d start: a fixed-fee look at how your week actually runs, with a plain plan at the end.
The assessment is credited in full if you go on to a build, and if I can’t find you five hours a week you pay nothing. See how it works.





















