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How to make AI text sound human

Why AI text reads as AI, the habits to cut, and how to rewrite it by hand, or with Hemmingway-1.5, whose writing passed GPTZero & Pangram 9 times in 10 in our test.

By the Hemmingway team · · updated

Write yours now: AI humanizer

Text written by an AI has habits, and people and AI detectors have learnt to spot them. The fix is not to swap words for synonyms. It is to change the habits, or to start from a model that does not have them. In our own test, 90% of what Hemmingway-1.5 wrote passed GPTZero & Pangram and four other top AI detectors on the first try, more often than the 86% that real human writing got. That is why we call it undetectable AI.

The habits that give it away

  • It explains itself. An intro saying what it is about to do, and a conclusion saying what it did.
  • Everything comes in threes. Three adjectives, three reasons, three bullet points, whatever the content needs.
  • Even rhythm. Every sentence about the same length, every paragraph about the same size.
  • Stock words. "Delve", "navigate", "tapestry", "crucial", "it's worth noting". None is wrong. Together they are a signature.
  • Hedging everywhere. "It may be helpful to consider." A person says what they think.
  • No specifics. General statements where a person would give the actual date, name or number.
  • Too polite for the reader. A reply to a friend that reads like it is going to a customer.

How to rewrite it

  1. Cut the first and last paragraph and see if you miss them. You usually do not.
  2. Say the actual thing. Replace each general line with the specific fact behind it.
  3. Break the rhythm. Let a sentence be four words long. Join two others.
  4. Drop the stock words. Use the plain word you would say out loud.
  5. Match the reader. Write the length and tone you would use with this person.
  6. Read it aloud. Anything you would not say, change.

Doing it with Hemmingway

Hemmingway-1.5, the model in Hemmingway, was trained to write like a person in the first place, so the draft starts closer. Paste in the stiff version and say "make this sound like me", and give it anything it should know about who it is for. It rewrites it once, gives you only the text, and keeps the facts you gave it without adding new ones. By the model's Hugging Face card, 89% of its rewrites of AI text passed the same detectors. The AI humanizer opens the app with your draft filled in.

Its favourite job, in its own words, is taking a rough note and making it sound like you. In our blind tests, a judge asked "which of these did a person write?" picked the version by Hemmingway-1, the model 1.5 is built on, more often than any other model's, including Fable 5.1 and GPT-6 Astra. The numbers are here, and the detector test is in our AI detector test.

Or test your eye

Spot the AI gives you two texts, one by a person and one by Hemmingway. See if you can tell.

Try HemmingwayDownload the app

Common questions

How do I make ChatGPT text sound more human?

Cut the opening and closing paragraphs, replace general lines with the specific facts behind them, and vary the sentence length. Drop the stock words, match the length and tone to the reader, and read it aloud, changing anything you would not say.

What words make text sound like AI wrote it?

Words like "delve", "navigate", "tapestry", "crucial" and "it's worth noting". None is wrong on its own, but together they are a signature. Hedging such as "it may be helpful to consider" gives it away too.

Can I use this to get past an AI detector?

Yes. The habits on this page are what detectors look for, so cutting them helps. By its Hugging Face card, 89% of Hemmingway-1.5's rewrites of AI text passed GPTZero & Pangram and four other detectors.

Is there an AI that writes like a human from the start?

Hemmingway-1.5 was trained to write like a person, so the draft starts closer. In our own test, 90% of its writing passed GPTZero & Pangram and four other AI detectors on the first try, against 86% for real human writing. Hemmingway-1, which it is built on, came first in our blind Human-Likeness test. Both tests are our own.

Write yours

Opens Hemmingway with this filled in. Free to try, no card needed.

Read next

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  • Does AI writing pass GPTZero & Pangram?Mostly not: the big models' answers were flagged 74% to 87% of the time in our detector test. Hemmingway-1.5 passed GPTZero & Pangram 90%. The numbers and the method.
  • How to humanize AI textHow to humanize AI text so it passes AI detectors: paste it into a free AI humanizer, or write it with Hemmingway-1.5. Steps, before and after, test numbers.