StealthGPT vs Originality AI: Independent Test Results (2026) | StealthGPT
Originality AI is one of the hardest AI detectors to bypass. It's the standard most serious users benchmark against. In this test, we ran StealthGPT through both Originality's Standard 2.0 and Turbo 3.0 models to give you a clear, documented answer on whether it holds up. Here's what the results show
Table of Contents
What is StealthGPT?
StealthGPT is an undetectable AI service that humanizes AI-generated text so it bypasses AI detectors. It consistently scores among the highest in head-to-head testing across its category. It includes four core tools: the AI Humanizer, which rewrites AI text to pass detection; the Stealth Writer, which generates undetectable content from scratch; and the Essay Generator, which produces long-form undetectable essays; and our newest addition, Stealth Agent, the all-in-one undetectable AI content writer.
How Does StealthGPT Work?
StealthGPT is fundamentally different from every undetectable AI humanizer in the marketplace. We have noticed our responses have much more volatility and this is reflective of the way StealthGPT was built.
StealthGPT is built on custom models trained on hundreds of hours of human-written text, which is what separates it from tools that simply paraphrase or synonym-swap. Most AI humanizers on the market haven't meaningfully updated their models as detectors have evolved. StealthGPT has. Which is why it continues to pass even the most aggressive detectors at high rates.
Does StealthGPT Beat Originality?
Does StealthGPT beat Originality AI? Originality AI is powerful and percise making it one of the hardest AI detectors to bypass. Beating Originality consistently is a must for any service that calls itself "undetectable". In building StealthGPT we tested thousands upon thousands of generations of our custom models against Originality and a handful of AI detectors to make sure it bypasses Originality at an extremely high rate.
As of April 2026, Originality AI runs two detection models: Standard 2.0 and Turbo 3.0. Turbo 3.0.2 is their most aggressive model and the harder of the two to bypass. We tested StealthGPT against both. The results below use the Standard 2.0 model, see our dedicated Originality Turbo 3.0.2 bypass guide for those results.
No tool in this space wins 100% of the time — AI detectors update, and honest testing reflects that. Our internal standard for model approval is 90%+, meaning 9 out of 10 generations must pass before a model ships. The results below reflect that standard in practice.
First let's get a null text from ChatGPT:
Here you can see our fully generated text. We mention this again because in Originality's own testing they do not show the full text generated by their PDF, this does not allow us to validate any claims they made in their article. By including the full text, they will be able to check our claims against their own Database.
Now let's get the StealthGPT response:
Notice that we are running our text generation on the lowest undetectability model we have available on StealthGPT. This is because we are so confident in our models abilities, we have no doubt even our lowest models consistently beat out even the best AI Detectors. Now let's conduct our test and see if the text is truly Undetectable.
And now for the results...
The results speak for themselves. Again, you can see in the full screenshot the text that we used against Originality AI. Now their team can go back and validate our claims are true. The cat and mouse game goes on, and on, but we know the game better.
Let's check to see how StealthGPT did against their Plagiarism Readability Detector:
0% plagiarized and 99% original. This was on try first while I wrote this blog.
Final Thoughts:
StealthGPT bypassed Originality AI with totally original content on the first attempt. If you need a humanizer that holds up against one of the market's most stringent detectors, the results here speak for themselves.
The best way to verify is to test it yourself. StealthGPT's free plan gives you immediate access, no credit card required. For consistent results, follow the humanization documentation to get the most out of each generation.
Try StealthGPT Free. When they upgrade, we will be ready.
