AI Humanizer Blog — Tips, Guides & Reviews

Grubby AI's guarantee page promises a 100% Turnitin bypass with no fine print. Its contract says all purchases are non-refundable and routes the guarantee to a section that never mentions refunds. Here is what the documents actually say.

Alex Halpin

10/3/2026

Turnitin's AI detection documentation names GPT-3.5, GPT-4, GPT-4o and GPT-4o-mini, and no Claude or Gemini model. What that does and does not tell you about your score.

Alex Halpin

9/27/2026

Walter Writes AI's free humanizer moved a 255-word AI sample from 99.2% to 92.8% on Sapling and not at all on GPTZero. Its own built-in detector called the same text 22% and human.

Alex Halpin

9/26/2026

Grammarly's free AI humanizer rewrote my test paragraph well and preserved every fact. Sapling still scored the result 99.1% AI. Grammarly's own detector said 0%.

Alex Halpin

9/25/2026

Two sets of researchers measured how often GPTZero calls a human essay AI-generated. One got 0.05%, the other 50%. Same tool, two years apart, both correct. Here is what its published numbers cover and which one applies to your document.

Alex Halpin

9/17/2026

In June 2026 four commercial detectors were run over 40 papers written end to end by GPT-4o. Three of them flagged nothing. All four advertise 99% accuracy or better. Here is every published number, with its date and its source.

Alex Halpin

9/15/2026

GPTZero stopped using perplexity and burstiness in autumn 2023, which is awkward, because that is still how almost every explainer says AI detectors work. Here are the three generations, and the one that actually scores your writing.

Alex Halpin

9/14/2026

Turnitin ran its AI writing indicator across 33 million US college submissions between October 2025 and April 2026. A growing list of universities, including Vanderbilt, Pittsburgh, Johns Hopkins, Illinois and Curtin, has switched the feature off.

Alex Halpin

9/12/2026

Google has no AI-content penalty, and the sites that collapsed in March 2026 collapsed for older reasons. What did change this year was the addition of watermarks to text, and Google helped set the standard.

Alex Halpin

8/26/2026

Anthropic started watermarking Claude on 2 August 2026, and within days the web filled with tools promising to remove it. Almost all of them are removing something that was never there.

Alex Halpin

8/21/2026

PaperBleach, Rephrasy, Rewritely, NaturalWrite, JustDone — they all advertise near-perfect bypass rates and none of them can prove it. Here's a framework for judging them that does not rely on anyone's marketing.

Alex Halpin

7/27/2026

iThenticate is not free, and the workarounds circulating on Reddit mostly are not either. Here is what access actually exists, what your institution probably already pays for, and how to check a manuscript properly before you submit it.

Alex Halpin

7/27/2026

There is a persistent belief that Claude slips past detectors that catch ChatGPT. There is something behind it, but it is smaller and less reliable than the forums suggest — and it is not a strategy.

Alex Halpin

7/27/2026

These three tools are marketed interchangeably and optimise for completely different things. Picking the wrong one is why people end up with text that reads worse and still gets flagged.

Alex Halpin

7/27/2026

Learn how to make AI text undetectable to GPTZero, Turnitin, Originality.ai, and every major AI detector — without manually rewriting your entire document.

Alex Halpin

5/16/2026

We tested Turnitin, GPTZero, and Grammarly's AI detectors head-to-head to find which is most accurate, which generates false positives, and how to bypass each one.

Alex Halpin

5/14/2026

We tested every major free AI humanizer at 500, 1500, and 3000 word limits to find which tools actually work for free — and which are free in name only.

Alex Halpin

5/12/2026

Learn how to humanize AI text so it bypasses GPTZero, Turnitin, and Originality.ai. Step-by-step guide with tested methods for any AI tool.

Alex Halpin

5/10/2026

Turnitin AI detection analyzes perplexity and burstiness — not plagiarism. Here's exactly how it works, what it catches, and how to pass it.

Alex Halpin

5/8/2026

Canvas doesn't have a built-in AI detector — but Turnitin, Copyleaks, and GPTZero integrate directly into Canvas LMS. Here's what actually detects AI in Canvas submissions.

Alex Halpin

5/6/2026