AI that writes like you: how to get an AI to match your voice, and the tools built for it

With no samples, a model writes the most likely next word, so you get the average of everything it has read. Describing yourself barely helps: “friendly but professional” fits half the internet. Your own sentences carry what a description cannot, such as how long your sentences run, which words you repeat, and how you open and close.

One note on words: this guide is about your writing voice. Tools that clone how you sound in audio are a different category.

1. Collect 5 to 10 samples per format, written by you without AI. Pick your best work, since the AI will copy the habits it sees. If you mostly speak on camera, turn your videos into text with a free tool, such as our YouTube, TikTok or Instagram transcript generator.
2. Write a one-page voice sheet: phrases you use, words you never use, how long your sentences run, how you open and how you end. Ten honest lines beat a long brand document.
3. Put both somewhere they persist. In ChatGPT, use a Project: select New project, add your files, then add your rules under the ••• menu and Project settings. In Claude, create a project and upload them.
4. Ask for one draft on a topic you know well, and mark every line you would change.
5. Turn each change into a rule and add it to the sheet. Stop when the same corrections stop coming up.
6. Run a blind test: mix a draft in with two of your real posts and ask someone who knows your writing to find it.

Write as me. Samples of my writing are attached. Copy my habits, and leave out anything that is not in them.

How I open: [e.g. a plain statement, never a question]
Sentence length: [e.g. short, then one long one]
Words I use a lot: [list]
Words I never use: [list]
How I end: [e.g. one direct ask]
Opinions I hold: [2 or 3 you would defend]

If you need a story, number or result you do not have, write [ADD] instead of inventing it.

Prices and features as of November 2026, read on each company’s own site. “Not listed” means we did not find it on their pages, not that the product cannot do it. Scroll sideways on small screens.

A general assistant is enough if you write in one or two formats, post now and then, and do not mind keeping a Project up to date. It costs nothing to try, and the method above works well there. Keep two things in mind with ChatGPT (as of November 2026):

• Do not build your voice on a new custom GPT. OpenAI has scheduled custom GPTs to retire on December 11, 2026, and is moving them to plugins. A Project avoids the migration.
• OpenAI says information from custom instructions is used to improve its models, and that you can opt out. Check this if your samples include client work.

A dedicated tool starts to pay off when you post several times a week, when each platform needs its own samples, or when you want the tool to read your posts for you. Pick by platform: Taplio if it is LinkedIn, Octupie if it is Instagram, Subscribr if it is YouTube. Jasper makes sense when several people must write as one brand. Viuz makes sense if you also want posts scheduled.

• The read-aloud test. Anywhere you stumble is a sentence you would not have written.
• The edit count. Note how many lines you change per draft. If that number is not falling after a week, your samples or rules need work.
• The banned-word check. Search each draft for the words on your never list. If they keep coming back, move the rule to the top of your instructions.
• The blind test from step 6. It is the only one that does not rely on your own judgement.

Be honest about the limits. Any AI can copy your rhythm and vocabulary, but it does not have your stories, results or opinions. If you do not give it those, it will write around them or make them up, so keep a real one ready for each draft and check every number and claim before you publish.

You import up to five of your own posts per format from Instagram, TikTok, YouTube, LinkedIn or X (100 credits; videos are transcribed), or paste them for free. Each format keeps up to five voice examples and three calls to action, which you can read and edit, and every draft for that format uses them. A Creator Brain (300 credits to build) adds your offers, story, proof and voice rules, and you approve it before it is used. If you have no posts yet, you can start from a creator you love and move to your own words later.

It also starts from what is working in your niche, so you can repurpose a viral post into your own words on a structure that fits it. New accounts get 2,500 free credits once, with no card.

Another tool is the better choice in these cases:

• You want it free for good and enjoy the setup. Use ChatGPT or Claude with the method above.
• You post only on LinkedIn and want scheduling and analytics too. Taplio covers all of that in one place.
• You need many people writing as one brand with approval controls. Jasper is built around brand teams.
• You want proof before you start. We have no independent voice-match test to show you, so try it on one idea and run the blind test yourself.