I Tested 5 AI Humanizers on the Same Turnitin Essay – Here Are the Actual Scores

So I had a 1500-word essay that ChatGPT wrote for me as a first draft. I ran it through Turnitin first and got 94% AI detected. Then I put the same text through 5 different AI humanizer tools and submitted each version to Turnitin separately.

Here are my results:

Walter Writes brought it down to 8% AI detected. The text still read naturally and kept my main arguments intact. Honestly impressed.

Undetectable AI got it to 12%. Pretty good but it changed some of my technical vocabulary in ways that didnt make sense for my field.

HIX Bypass landed at 23%. It made the writing way too casual for an academic paper. My professor would have noticed something was off.

Humbot got 31%. Barely moved the needle and the output had some weird phrasing.

StealthWriter came in at 18% but the writing quality was noticeably worse. Lost a lot of the nuance from the original.

My takeaway: the best approach is using a humanizer as a starting point and then going through the text yourself. None of them produce submit-ready work on their own but some give you a much better foundation to work from.

Has anyone else done side by side testing like this? Curious if your results were similar.