How to Teach AI to Write Like You

You ask AI to write an email in your voice. The facts look right, but the draft opens with “We are thrilled to announce.” You aren't thrilled. You're hosting a Thursday session.

So you ask it to sound more conversational. Now it's an overcaffeinated LinkedIn post.

The problem isn't that you need a better adjective. You need to show the tool how you actually write, then separate those examples from what today's message must say.

This approach works with ChatGPT, Claude, Gemini, Grok, and Copilot. The useful question isn't which tool knows you best. It's whether you've given it evidence worth following.

Your voice is a pattern of decisions

“Friendly” and “professional” describe impressions. They don't tell AI whether you lead with the answer, explain the background, or soften a request.

Your writing samples show those choices. They reveal how you spend the reader's attention, which words you avoid, and when an example earns its space.

Voice is judgment made visible. That's also why matching your voice isn't the same as matching your judgment.

AI can reproduce your short sentences while making a promise you'd never make. In fact, familiar phrasing can make that promise easier to miss. It sounds like you, so you lower your guard.

That's the reason for this method: give AI your patterns, but keep control of the meaning.

Choose three to five samples that fit the job

Start with writing you'd happily send again today. You don't need your greatest hits, and you certainly don't need your entire sent folder.

For a client email, choose client emails. For a social post, choose social posts. Your late-night text and your formal report aren't competing definitions of your voice. They're different situations.

Look for samples that show:

• How you open and close a message.
• How much background you give before reaching the point.
• Your mix of short and longer sentences.
• Words you actually use, rather than words that merely sound impressive.
• How directly you make requests or recommendations.

Three to five relevant samples are a useful starting point, not a magic number. More material won't help if it teaches conflicting habits.

Before pasting anything, remove client names, internal numbers, and other confidential or regulated details. Replace them with neutral placeholders. AI needs your sentence patterns, not your client's business.

Ask for the pattern before the draft

A prompt is simply the instruction you give an AI tool. For this task, your first prompt should ask what it notices, not immediately request a rewrite.

Describe the recurring writing choices in these samples. Cover openings, sentence length, vocabulary, amount of background, and directness. Point to examples. Don't just label the tone “friendly” or “professional.”

Check its answer. If it says you “always use humor” because one email had a joke, correct that. Otherwise, every invoice may arrive with a supporting act.

Save the useful observations as a short voice brief: a plain-language description of your writing habits. Keep separate briefs for different kinds of writing.

Build the draft from two separate inputs

Here's the distinction that prevents a lot of trouble: samples supply the style; today's fact list supplies the content.

An old email might show how you announce an event. Its date, price, and promises don't belong in the new announcement.

Label those inputs separately. Then tell AI not to borrow facts from the samples or invent missing details. That instruction helps; it isn't a guarantee.

A worked example: announcing a live online session

A business owner wants an email announcing a session. The first draft says:

We are thrilled to announce an exciting upcoming webinar packed with valuable insights and actionable strategies. Reserve your spot today and prepare to transform your approach!

Nothing is grammatically wrong. It just sounds like the invitation was assembled from spare marketing parts.

The owner provides three passages from previous emails:

Quick heads-up: I'm hosting a short session next Thursday.

I won't try to cover everything. We'll focus on the few decisions that make the biggest difference.

If this is useful for where you are right now, I'd be glad to have you there.

After checking the patterns AI identifies, the owner uses this drafting prompt:

Write an email announcing my live online session. Use my samples as style references, not as sources of facts.
STYLE SAMPLES

Quick heads-up: I'm hosting a short session next Thursday.
I won't try to cover everything. We'll focus on the few decisions that make the biggest difference.
If this is useful for where you are right now, I'd be glad to have you there.

FACTS FOR THIS EMAIL

I'm hosting a live online session.
It's Thursday at 1:00 p.m.
It lasts 30 minutes.
We'll work through three ways to make follow-up emails clearer and easier to send.

DRAFTING RULES

Match the samples' directness, rhythm, and low-pressure invitation.
Don't force every sample phrase into the email.
Keep the facts unchanged.
Don't add benefits, urgency, scarcity, or promises I haven't supplied.
Don't invent a date, time zone, registration link, or other missing detail. Flag anything needed before sending.

Return one draft. Below it, list any missing details and any claims I should verify.

The resulting draft:

Quick heads-up: I'm hosting a 30-minute session Thursday at 1:00 p.m. We'll look at three practical ways to improve your follow-up emails. I won't try to cover every possible tactic. The goal is to help you make the next email clearer and easier to send. If that would be useful, I'd be glad to have you there.

That's closer, but the owner notices two false notes. “Practical ways” is vaguer than their usual phrasing. “The goal is to help you” takes too long to get there.

After a human edit:

Quick heads-up: I'm hosting a 30-minute session Thursday at 1:00 p.m. We'll work through three ways to make your follow-up emails clearer and easier to send. If that's useful for where you are right now, I'd be glad to have you there.

The voice is closer. Before sending, the owner still needs to confirm whether readers need the calendar date, time zone, and joining instructions.

That's an important distinction: a draft can sound finished before it's ready to send.

Check promises before polishing phrases

Review the draft against your fact list first. Did “three ways to improve follow-up emails” become “three ways to double responses”? That's a new claim, not a style choice.

Then read it aloud. Your ear often catches phrases your eyes accept because they're tidy. Replace anything you'd never actually say.

Watch for repeated signature phrases, too. If you occasionally write “Quick heads-up,” AI may put it everywhere. A recognizable habit can become a verbal uniform surprisingly fast.

The same approach works when turning a long article into a short social post. Give AI two or three posts showing how you normally compress an idea.

Ask it to preserve the article's central point while matching their opening style, length, and directness. Then check what disappeared. Cutting a qualification can turn a careful observation into a claim you don't believe.

Use it for drafting, not delegated judgment

This method is useful when you know what you want to say but need help getting it onto the page. It won't resolve an unclear offer or decide what you should promise.

Don't send unreviewed drafts, especially when the message makes a sensitive commitment. And don't upload private material just because it would make a good sample.

Don't assume one successful conversation creates permanent memory, either. What carries forward depends on the tool and its settings. Save your samples, fact-list template, and corrected voice brief somewhere you control.

The repeatable method is Sample → Pattern → Judgment. You supply evidence, AI identifies habits, and you decide whether the result deserves your name.

Try it on one email today

Take one email you're proud of and one generic AI draft on the same topic. Ask AI to name the observable differences, then rewrite the draft with the facts unchanged.

Check its claims, read it aloud, and fix the phrases that don't belong to you. One comparison is enough to start; build your three-to-five-sample set from there.

When you're ready for a reusable setup across email, social, and longer writing, use the Action Guide above. Keep your samples separate by context, and keep your judgment in the loop.

Write an email announcing my live online session. Use my samples as style references, not as sources of facts.
STYLE SAMPLES

Quick heads-up: I'm hosting a short session next Thursday.
I won't try to cover everything. We'll focus on the few decisions that make the biggest difference.
If this is useful for where you are right now, I'd be glad to have you there.

FACTS FOR THIS EMAIL

I'm hosting a live online session.
It's Thursday at 1:00 p.m.
It lasts 30 minutes.
We'll work through three ways to make follow-up emails clearer and easier to send.

DRAFTING RULES

Match the samples' directness, rhythm, and low-pressure invitation.
Don't force every sample phrase into the email.
Keep the facts unchanged.
Don't add benefits, urgency, scarcity, or promises I haven't supplied.
Don't invent a date, time zone, registration link, or other missing detail. Flag anything needed before sending.

Return one draft. Below it, list any missing details and any claims I should verify.