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LLM-isms

nounAlso: LLM-ism, GPT-isms, ChatGPT-isms, AI tells, slop words

In plain wordsWords, phrases and habits of style that AI chatbots overuse — certain fancy verbs, tidy lists of three, 'it's not just X, it's Y' — which make writing recognizable as machine-made.

  1. Characteristic stylistic tics of text generated by large language modelslarge language model, n.: A computer program trained on enormous amounts of text to predict the words that come next. At vast scale, that simple skill lets it chat, answer questions, translate, summarize and write code., whose recurrence makes the output recognizable. They include favored vocabulary (delvedelve, v.: An ordinary English verb meaning to dig into a subject, which AI chatbots used so often in 2023–2024 that it became a joke and a supposed telltale sign of machine-written text., 'tapestry', 'testament', 'nuanced', 'seamless'); stock openers and closers ('Great question!', 'I hope this helps'); reflexive hedges and disclaimers; sycophanticsycophancy, n.: When an AI tells people what they want to hear — flattering them, agreeing with their mistakes or dropping a correct answer under pushback — instead of what is true or useful. agreement (see you're absolutely rightyou're absolutely right, phr.: A stock phrase AI assistants, especially Anthropic's Claude, became known for saying — often even when the user was wrong — which turned into a running joke about chatbots' eagerness to agree.); triads and parallel constructions; the 'it's not X — it's Y' contrast; heavy use of bullet points, bold text and headings; and, contentiously, the em dash. LLM-isms arise mainly in post-trainingpost-training, n.: Everything done to an AI model after its initial bulk training on huge amounts of text: the extra teaching that turns a raw text predictor into a helpful, safe assistant or a careful reasoner., where preference optimization rewards a polished, agreeable register and narrows stylistic variety; they shift between model generations as developers train out the most mocked ones. Readers treat them as informal evidence of AI authorship, an unreliable practice that also stigmatizes human writers with similar habits.

    I stripped the LLM-isms out of the draft — no more 'in today's fast-paced world'.

Origin

Grew up informally on social media and forums in 2023 as readers learned to recognize ChatGPT's house style, alongside 'GPT-isms' and 'ChatGPT-isms'. Lists of telltale words and constructions circulated widely in 2024, and Wikipedia editors compiled a guide to signs of AI writing to help detect generated text. No single coiner is known.

Usage note

The em-dash controversy shows the risk of over-reading tics: many professional writers have always used the dash heavily and resent its new association with machines.

Related

See also
  • delvedelve, v.: An ordinary English verb meaning to dig into a subject, which AI chatbots used so often in 2023–2024 that it became a joke and a supposed telltale sign of machine-written text.
  • you're absolutely rightyou're absolutely right, phr.: A stock phrase AI assistants, especially Anthropic's Claude, became known for saying — often even when the user was wrong — which turned into a running joke about chatbots' eagerness to agree.
  • glazingglazing, n.: Slang for heaping excessive, uncritical praise on someone; applied to AI chatbots that flatter users and call every idea brilliant, especially after a much-mocked ChatGPT update in April 2025.
  • AI slopAI slop, n.: Low-quality content churned out in bulk by AI — bland articles, fake-looking images, filler videos — posted to grab clicks or fill space, with little care for accuracy or value.
  • sycophancysycophancy, n.: When an AI tells people what they want to hear — flattering them, agreeing with their mistakes or dropping a correct answer under pushback — instead of what is true or useful.
  • post-trainingpost-training, n.: Everything done to an AI model after its initial bulk training on huge amounts of text: the extra teaching that turns a raw text predictor into a helpful, safe assistant or a careful reasoner.

Mentioned in

AI slopAI slop, n.: Low-quality content churned out in bulk by AI — bland articles, fake-looking images, filler videos — posted to grab clicks or fill space, with little care for accuracy or value., AI detectorAI detector, n.: Software that scores how likely it is that an AI, not a person, produced some text or media; for writing, its verdicts are wrong often enough that many schools no longer trust them., delvedelve, v.: An ordinary English verb meaning to dig into a subject, which AI chatbots used so often in 2023–2024 that it became a joke and a supposed telltale sign of machine-written text., homogenizationhomogenization, n.: The tendency of AI to make things more alike: products built on the same few models share the same flaws, and people who write or create with AI produce more similar work., glazingglazing, n.: Slang for heaping excessive, uncritical praise on someone; applied to AI chatbots that flatter users and call every idea brilliant, especially after a much-mocked ChatGPT update in April 2025., you're absolutely rightyou're absolutely right, phr.: A stock phrase AI assistants, especially Anthropic's Claude, became known for saying — often even when the user was wrong — which turned into a running joke about chatbots' eagerness to agree.