The Copy Your Freelancer Sent Feels Off — Here's How to Find Out If It's AI-Generated

Picture this: you hired a freelance writer, paid for a batch of blog posts, and when the deliverables land in your inbox, something feels off. The sentences are technically correct. The paragraphs are well-structured. But the whole thing reads like it was written by no one in particular — polished, flat, and a little too clean.

That uneasy feeling is often the first sign. But "something feels off" is not something you can bring to a real conversation. Before you do anything, you need to know how to actually find out if text is AI-generated — and what those results actually mean before you act on them.

What Does "AI-Generated Text" Actually Mean?

AI-generated text is content produced by a language model — like ChatGPT or Gemini — rather than a human. These models predict what word comes next, over and over, until they produce something that sounds coherent. The result is writing that is technically fluent but often statistically predictable.

AI tends to produce sentences that are similar in length, transitions that are formulaic, and paragraphs that maintain an even, consistent tone with no personality drift. Nothing is grammatically wrong. The problem is the texture.

How Do AI Detectors Actually Find It?

AI detectors don't read text the way a human does. They measure statistical patterns. The main signals:

• Perplexity — how "surprising" the word choices are. AI models tend to pick safe, predictable words. Humans make stranger, more personal choices.
• Burstiness — humans vary their sentence length dramatically. Short punchy line. Then a long winding sentence that builds and builds before finally landing. AI tends to keep everything in a narrow, even range.
• Vocabulary consistency — a rough measure of how word choices shift across a piece. AI text is often surprisingly uniform throughout.

For a deeper look at the mechanics behind all of this, the how AI detectors work explainer breaks it down step by step.

How to Actually Check If Text Is AI-Generated

The most direct method is to run it through a detector. WriteMask's free AI detector analyzes text for these statistical patterns and returns a likelihood assessment. No account needed to try it.

A practical approach:

• Paste a representative section — a few paragraphs is usually enough to get a clear read
• Note whether the result returns "likely AI" or "likely human"
• Try a second sample from the same document to see if the pattern holds across the piece

If you want to build your own intuition for what AI text actually looks and feels like, the AI or Human? game is a surprisingly useful training tool. You read short passages and guess whether a human or a model wrote them. After a dozen rounds, you start to feel the difference in your gut.

The Part Most Guides Skip: Detectors Are Not Courts of Law

This is the most important thing to understand before you act on any result. AI detectors return probabilities, not verdicts. A "likely AI" flag means the text shares statistical patterns with AI-generated writing — it does not mean the writer used AI.

Confident, formal, or highly structured writing can trigger false positives. Non-native English speakers are especially vulnerable, because their writing patterns can appear more regular to a detector trained largely on native English text. This is a documented, ongoing problem in the field. The AI detection false positives piece goes into detail on exactly when and why this happens — worth reading before you draw any conclusions.

What Should You Do With a Positive Result?

Treat it as the start of a conversation, not the end of one. A detector flag is a reason to ask questions — not to cancel a contract or make an accusation.

Some practical next steps:

• Ask the writer to walk you through their research notes or drafting process
• Request a short revision on a specific section with a clear brief — a human writer will adapt naturally; workflows that rely heavily on unedited AI output tend to struggle with iterative, specific feedback
• Look at writing across several pieces — AI-assisted work often has a characteristic consistency that differs from the natural voice variation you see in a writer's work over time

If you are on the other side of this situation — you are a writer who got flagged and need to demonstrate your work is genuine — how to prove your writing is human covers the practical steps available to you.

Running Checks as a Routine Quality Step

Some content managers now check all freelancer submissions before publishing — not as a trust issue, but as a quality-control measure. AI-generated content that hasn't been carefully edited tends to be generic in ways that quietly hurt reader engagement and SEO performance.

If you're managing a content operation and need a fast, reliable tool, WriteMask is built for exactly this. It's primarily an AI humanizer — with a 93% pass rate on major detectors — but the detection side of the platform gives you a quick read on any text you paste in.

The Short Version

To find out if text is AI-generated: run it through a detector, look for the statistical patterns that flag it, and treat the result as one data point among several. The patterns are real and often visible once you know what to look for. But so are false positives. Use detection as a starting question — not a final answer.