How to spot AI writing

www.economist.com · 2026-08-01 · by Long Nguyen ·generic
The Economist analyses how artificial intelligence writing differs from human prose, examining vocabulary, punctuation and sentence structure across major language models. | Culture

How to spot AI writing

Culture | Paper trails

How to spot AI writing

Large language models like long words and em-dashes—or do they?

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Jul 30th 2026|6 min read

A GHOST WRITER is haunting the English language. The linguistic spectre can turn its hand to prose, poetry, journalese and corporate jargon. It is frightfully versatile: you can get it to mimic Shakespeare’s sonnets or a schlocky beach read; Ernest Hemingway’s taut prose or the office-printer manual. It is frightfully fast, churning out thousands of words a minute. (Hemingway rarely produced as many in a day, and required much more booze.) Wordsmiths are spooked.

AI writing is everywhere. It is in your inbox and on your LinkedIn feed. It is all over the internet, drafting more than a third of new websites by one count. Large language models (LLMs) are helping students write essays and probably helping scientists write papers. Some allege AI-generated prose won the Commonwealth Short Story prize this year, with judges praising its “quiet authority”. (The Commonwealth Foundation denied the claim.)

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