Are Em Dashes Really a Sign of AI Writing?
Are Em Dashes Really a Sign of AI Writing?
By Miles Klee
Miles Klee
Contact Miles Klee on X Contact Miles Klee by Email View all posts by Miles Klee April 11, 2025 The em dash has been a staple of literary writing for centuries. ChatGPT itself, which if nothing else should know about the history of its own training, will inform you that em dashes “by themselves are not a reliable sign that a text was AI-generated,” and that the popular misconception to the contrary may be a vestige of earlier, less sophisticated models.
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“Some early AI-generated content (especially before 2023) used em dashes more frequently than the average human writer,” the bot says. “It was part of mimicking formal or stylized writing.” Now that ChatGPT and similar tools can fine-tune their cadence and tone based on descriptive prompts, it adds, punctuation will vary based on the writing style requested.
On the one hand, the received opinion that the long dash is a product of generative AI that basically didn’t exist in years past is a worrying sign about public literacy: Celebrated poets and philosophers from Emily Dickinson to Friedrich Nietzsche have been known to flaunt them in expressive ways, and many people serious about the craft of writing find them useful. Getty Images
And in a recent viral Instagram clip from LuxeGen, a lifestyle podcast aimed at a Gen Z audience, one co-host referred to the em dash as “the ChatGPT hyphen.” She said that a fashion company that announced a rebrand with a short statement on social media was facing criticism in the comments from readers who saw two em dashes in the text and immediately assumed they had let ChatGPT write the ad copy. “It’s a longer hyphen, I don’t know if you’ve noticed it,” she added. Read more about it here.