Is AI Detector accurate?

by using Copyleaks

Because I'm launching my new directory (Verified Tools), I needed to write some introduction and description of my service. And because I'm Korean who is not English native, I used Claude AI to fix my grammar. And it fixed a few words and that was it.

I was curious if AI can detect my sincere words as a human-written words.

And the result is... It says it's 100% AI content!

And then I checked the original words that I wrote, and the result was 0% AI content.

So in results, it was so correct if I use AI or not.

It was my first time to use this kind of service, and I wouldn't trust it 100%. I used it for grammar check and AI only changed a couple or words/grammar so at least, if you have to use these tools for whatever reasons, you should give chances to people and use these tools only for references.

And by the way, when I put this post texts to the detector tool, it says it's human-written.

Maybe it was affected when I ask claude to check my grammar errors? Even so, it's better than just submitting it with errors. So It's actually put much effort..