How to Tell If Text Is Written by AI: 9 Signs to Look For

AI-generated text is everywhere—from student essays to marketing copy to social media posts. While AI detection tools can help, knowing how to spot AI writing with your own eyes is an invaluable skill. Here are 9 telltale signs that text was likely written by ChatGPT, Claude, Gemini, or another AI model.

1. Uniform Sentence Length (Low Burstiness)

This is the most reliable manual signal. Human writing naturally varies—we mix short sentences with long ones. A punchy three-word sentence followed by a 30-word complex one. AI text tends to keep sentences at a similar length throughout, creating a monotonous rhythm.

Count the words in consecutive sentences. If most sentences fall within a narrow range (say, 15-20 words each), that's a red flag.

2. Excessive Hedging Language

AI models are trained to avoid definitive claims, so they hedge constantly. Watch for an overabundance of words like:

• "It is important to note that..."
• "While there are many factors to consider..."
• "This can potentially..."
• "It's worth mentioning that..."
• "In many cases..."
• "This may vary depending on..."

One or two hedges in an article is normal. But when almost every claim is softened with qualifiers, that's a pattern AI tends to produce. Human writers are more willing to take a stance.

3. Em Dash Overuse

This has become one of the most discussed AI writing signatures in 2025-2026. AI models—particularly ChatGPT—use em dashes (—) at a much higher rate than typical human writers. If you see em dashes in more than 30% of sentences, it's worth flagging.

To be clear: em dashes are perfectly valid punctuation that skilled human writers use. The issue is frequency. When nearly every other sentence contains an em dash, it suggests AI generation. Check our guide on spotting AI writing patterns for more details on this signal.

4. Generic Examples Without Specifics

AI tends to give abstract, hypothetical examples rather than concrete, specific ones. Compare:

• AI-like: "For example, a marketing team might use AI to improve their content strategy and drive better engagement."
• Human: "Our team at Acme Corp cut our blog production time by 40% after we started using Claude for first drafts—but engagement dropped 15% until we added back the human editing step."

Humans draw from lived experiences with specific numbers, names, and personal observations. AI generates plausible-sounding but vague scenarios.

5. Overly Balanced Perspectives

AI models are trained to be helpful and avoid controversy, so they present "both sides" of nearly every topic with diplomatic neutrality. The result is text that reads like a Wikipedia article—informative but opinion-free.

Human writers take sides. They have hot takes. They say "I think this is wrong" or "this approach is clearly better." When every paragraph carefully acknowledges counterarguments without committing to a position, it often signals AI.

6. Transition Word Overload

AI loves transition words more than your high school English teacher. Look for excessive use of:

• "Furthermore" and "Moreover"
• "Additionally" and "In addition"
• "Consequently" and "Subsequently"
• "Nevertheless" and "Nonetheless"
• "It is worth noting" and "Notably"

These words aren't wrong, but AI uses them at 2-3x the rate of typical human writing. A piece that starts every other paragraph with a formal transition word is likely AI-generated.

7. Perfect Grammar, Zero Personality

Real human writing has character. Minor imperfections, colloquialisms, sentence fragments for emphasis. Starting a sentence with "And" or "But." Slang. Humor. Voice.

AI text is technically flawless but often feels sterile. If a piece reads like it was written by someone who has never had a bad day, told a joke, or used informal language—it might not have been written by a person at all.

8. Repetitive Paragraph Structure

AI often falls into predictable structural patterns. A common one:

1. Topic sentence making a claim
2. Supporting sentence with elaboration
3. Example sentence
4. Concluding sentence that echoes the topic sentence

When every paragraph follows the same formula, it creates a mechanical feel. Human writers structure paragraphs more organically—sometimes two sentences, sometimes eight, depending on what the content demands.

9. Lack of Specific Citations or Sources

AI models sometimes fabricate citations entirely—a phenomenon called "hallucination." But even when they don't fabricate, they tend to make broad claims without linking to specific sources: "Studies show that..." or "Research has found that..." without saying which studies or whose research.

If you need to verify whether citations in a piece are real, try our citation verification tool—it checks whether references actually exist.

How to Confirm Your Suspicions

Manual detection is a starting point, not a conclusion. If you notice 3 or more of these signs in a piece of text, it's reasonable to suspect AI involvement. But to confirm:

1. Use an AI detection tool: Run the text through a free AI detector for a data-backed assessment.
2. Cross-reference with multiple tools: No single detector is perfect. Check our comparison of the best AI detectors for recommendations.
3. Ask the author: If it's a student or colleague, a conversation about their writing process is often the most revealing approach.
4. Check the metadata: Documents sometimes retain metadata from AI tools, especially in Word or Google Docs.

Frequently Asked Questions

Final Thoughts

Learning to spot AI-written text is a skill worth developing, whether you're a teacher evaluating student work, an editor reviewing submissions, or just a curious reader. The 9 signs above won't catch every case, but they'll catch most—especially when you combine manual observation with AI detection tools.

The key is to look for patterns, not individual signals. One em dash doesn't mean AI. One hedging phrase doesn't mean AI. But five of these signs in the same piece? That's worth a closer look.