Independent benchmark · Sep 2025

How TheChecker.AI Compares Against the Competition

We ran 10 AI-generated text samples through 8 leading detection tools. Here are the unfiltered results.

10

AI-generated test cases

100%

AI-text detection rate

7

Competing tools tested

Correct detection
Partial / borderline
Missed / incorrect
TheChecker.AI result

Winston AI results converted from Human Score to AI probability.

AI-generated texts

Detecting AI-written content

Higher score = correctly identified as AI-generated. All 10 samples were produced by large language models.

#Text sampleQuillBotSaplingZeroGPTGPTZeroGrammarlyWinston AIUndetectable.aiTheChecker.AI
1

Carbon chemistry

Carbon is a chemical element with the symbol C and atomic number 6. It is essential for all known li…

100%100%100%100%0%100%99%100%
2

Catherine the Great

Catherine the Great was a prominent Russian Empress who reigned from 1762 until her death in 1796. B…

100%100%100%100%100%100%53%100%
3

Philosophy overview

Philosophy is the study of fundamental questions about existence, knowledge, values, reason, mind, a…

89%100%94%100%57%99%75%100%
4

Global expedition challenges

Route Planning: This is one of the most significant hurdles. You can't just walk in a straight line.…

80%100%100%100%20%100%73%100%
5

Stars & nuclear fusion

Stars are massive, luminous spheres of plasma held together by their own gravity. They produce light…

100%100%100%100%0%100%62%100%
6

SOAP UI testing tool

SOAP UI is a popular open-source testing tool used for testing web services. It is particularly know…

100%100%90%92%25%100%84%100%
7

Manual QA testing

Manual testing in QA (Quality Assurance) refers to the process of manually executing test cases with…

100%100%100%100%100%100%99%100%
8

Aeronautics

Aeronautics is the field of science and technology focused on the design, development, construction,…

100%100%100%37%66%100%66%100%
9

Movies & entertainment

Movies are a popular form of entertainment that combines visual storytelling, acting, music, and spe…

100%100%100%100%50%100%99%100%
10

World War II

World War II was a global conflict that lasted from 1939 to 1945, involving most of the world's nati…

100%100%100%100%50%100%69%100%

The only tool that caught every AI-generated text

Across all 10 AI-generated test cases, TheChecker.AI scored 100% — no misses, no borderline calls. Grammarly missed 5 out of 10. GPTZero dropped to 37% on one sample. Only TheChecker.AI was consistent across every topic and writing style.