What AI Slop Looks Like in Writing (and the Patterns That Give It Away)

Table of Contents

• Why AI Writing Has Patterns at All

• Word-Level Patterns

• Phrase-Level Patterns

• Sentence-Level Patterns

• Paragraph and Structure Patterns

• Tone Patterns

• The Tells Are Changing

• What Human Writing Does That Slop Doesn't

• FAQ

Most people can recognize AI slop in writing within a few lines, but few can say exactly what tipped them off. That's a problem if you edit other people's work, manage freelancers or want your own AI-assisted drafts to read like you wrote them. A vague sense that something "sounds like ChatGPT" doesn't tell you what to change.

This guide breaks the patterns down level by level, from single words up to whole-document structure, with examples of each. If you want a quick checklist version instead, see our guide on how to spot AI slop.

Why AI Writing Has Patterns at All

Language models write by predicting likely next words. That pulls them toward the most common, safest phrasing for any idea. Then training for helpfulness and politeness layers on a second set of habits: balance, reassurance, tidy structure. The result is prose that's grammatically clean and strangely interchangeable.

These habits aren't random. A September 2026 study by Graphite compared 10,000 human articles with 90,000 AI-generated ones across nine models and found nearly 13,000 measurable AI tells, from single words to reusable sentence templates. Some appeared more than 500 times as often in AI text as in human writing.

Word-Level Patterns

The most famous tells are individual words that models overuse: "delve," "tapestry," "testament," "multifaceted," "moreover." They're not wrong words. They're just words most people rarely use, showing up at rates no human writer would match.

Watch for a few families:

• Inflated verbs: "leverage," "foster," "elevate," "empower," "unlock"

• Evaluative adjectives: "seamless," "robust," "vibrant," "crucial," "pivotal"

• Formal transitions: "moreover," "furthermore," "additionally" at the start of paragraphs

• Metaphor filler: "landscape," "journey," "realm," "navigate" for things that aren't places

One of these words means nothing. Five in a paragraph means someone didn't edit.

Phrase-Level Patterns

Phrases are where slop really shows, because they carry the empty calories.

• Throat-clearing: "In today's fast-paced world," "It's no secret that," "Have you ever wondered"

• Puffery: "plays a vital role," "stands as a testament to," "rich cultural heritage." Wikipedia's Signs of AI writing guide lists this kind of inflated importance as one of the clearest markers editors see.

• Vague attribution: "experts agree," "studies show," "many believe"

• Hedges stacked on hedges: "can potentially help to some extent"

• Chatbot residue: "I hope this helps," "Certainly! Here's," "As of my last update"

Sentence-Level Patterns

These are harder to spot because the words themselves are ordinary. The shape is what repeats.

Corrective framing. "It's not just a tool. It's a mindset." "This isn't about speed; it's about trust." The sentence argues against a claim nobody made. Graphite found variants of this frame hundreds of times more often in some models' output than in human text.

The rule of three. "Faster, smarter and more efficient." "Clarity, consistency and connection." Models reach for three items by default, whether the content has two points or seven.

Trailing "-ing" commentary. "The company launched a new app, highlighting its commitment to innovation." The tacked-on clause adds an interpretation that sounds analytical and says nothing.

The colon reveal. "The secret? Consistency." "Here's the thing: most people get this wrong." A dramatic pause before a small point.

Paragraph and Structure Patterns

Zoom out and the template becomes obvious.

• Uniform paragraphs. Every paragraph three or four sentences, every sentence about the same length.

• The sandwich. An intro that previews what's coming, a body, and a conclusion that repeats the intro. Often labeled "In conclusion."

• Heading inflation. A heading every 100 words, often in Title Case, sometimes followed by a bolded one-line summary.

• Balanced to a fault. Pros, then cons, then "ultimately, it depends on your needs."

Tone Patterns

Finally, the voice. Slop tends to be upbeat to the point of parody, eager to reassure and allergic to taking a position. Everything is "exciting," every challenge is "an opportunity," and no one is ever wrong. Real writers complain, joke, admit uncertainty and disagree with people by name.

The Tells Are Changing

Here's the catch: the famous tells are fading. Graphite's study found well-known markers like "delve" declined between 21% and 50% across model families as developers trained them out. Em dashes, long treated as a giveaway, are now used far less than humans use them by at least one major model. And only 45% of tells carried over between consecutive versions of the same model family.

So a word blacklist has a short shelf life. New tells replace old ones, like a sudden overuse of "less X, more Y" comparisons or evaluative adjectives. What stays constant is the underlying habit: generic, safe, balanced and specific about nothing. As one analysis in The Conversation put it, spotting AI text is still more art than science.

What Human Writing Does That Slop Doesn't

The same Graphite research found that human writing stands out for first-person voice, direct address to the reader, casual qualifiers and exclamation marks, which appeared 100 times more often in human text than in any current model. In plain terms, people sound like people: they say "I," they talk to you, they get excited, and they mention specific things that happened.

That's the fix, too. Add the specifics only you know, take a clear position, then clean up the language patterns above. StealthGPT's AI humanizer handles the pattern layer: it rewrites AI-sounding phrasing and rhythm so the text reads naturally while your meaning stays put. If you're also worried about detectors, our guide on how to bypass AI detectors explains how they score these same patterns.

FAQ

What does AI slop look like in writing?

It looks polished but generic: overused words like "delve" and "tapestry," throat-clearing openers, puffed-up importance, corrective "it's not X, it's Y" sentences, lists of three, uniform paragraphs and no specific names, numbers or experiences.

What are common AI slop phrases?

Phrases like "in today's fast-paced world," "plays a vital role," "stands as a testament to," "it's important to note that" and "I hope this helps" are among the most recognizable.

Why does AI writing all sound the same?

Models predict the most likely next words, which pushes them toward common, safe phrasing. Training for helpfulness adds habits like balance, reassurance and tidy structure.

Are AI slop writing patterns the same across ChatGPT, Claude and Gemini?

No. Research has found that most tells are specific to one model family, and they shift between versions. The general habits, like vagueness and formula structures, are shared.

How do I remove AI slop patterns from my writing?

Add concrete details and a clear opinion first, then edit out the patterns in this guide by hand or with a humanizer that rewrites the phrasing while keeping your meaning.