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I wanted to test how well AI detection tools work, so I signed up for GPTZero three months ago. I used both their free plan and tried their Premium plan for a month. I tested it with content I wrote myself and stuff I asked ChatGPT to write. I got some weird results.
Features I found useful:
\* Simple interface that shows you which parts of text might be AI-generated
\* Gives you a percentage score for how likely content is AI-written
\* Works with multiple languages
\* Offers a Chrome extension for quick checks
\* Has a free tier that lets you check up to 10,000 words per month
The good parts:
\* Easy to use with a clean design
\* The free plan works well for basic checks
\* It can catch obvious ChatGPT text sometimes
\* Provides specific highlighting of suspicious sections
\* Fast processing speed
The problems I faced:
\* False positives are a big issue
- it flagged my completely handwritten essay at 51% AI
\* When I slightly changed one sentence, it suddenly marked my whole paragraph as AI
\* It missed some content I had ChatGPT write completely
\* Not consistent
- sometimes the same text gets different scores
\* Premium plan ($12.99/month) didn't seem much better than the free version
My experience:
I first tried GPTZero because my professor mentioned they use it to check student work. I wrote an essay for my history class and decided to check it before submitting. To my shock, it said my introduction paragraph was "likely written by AI" even though I wrote it myself late at night with a cup of coffee!
The weird part was when I tested actual ChatGPT content
- some passed as "human written" while my own writing got flagged. I even tried pasting in old papers I wrote years ago (before ChatGPT existed), and some sections got flagged as AI.
I looked into competitors like ZeroGPT and Winston AI. They seem to have similar issues, though ZeroGPT felt a bit more accurate in my tests.
I think these tools are still too unreliable for schools to use them for grading. My professor almost gave me a zero on an assignment because of a false positive from GPTZero. We need to be careful about trusting these tools too much.
Disclaimer: This post is based on my personal experience using GPTZero. Different people may have different results and opinions. I'm not telling anyone to buy or avoid this product
- make your own decision based on your needs. If you're a student or teacher considering AI detection tools, test multiple options before relying on any single one.