The Challenge Facing the Rise of AI-Generated Content
In 2025, with generative AI tools readily available, combating AI-generated plagiarism is a significant challenge. This article provides an updated analysis of AI content detectors, essential for maintaining content integrity.
This is a completely updated version of a January 2023 article, where initial tests showed modest results. My most recent tests, in February 2025, used up to 10 checkers -- and three of them had perfect scores. This time, just a couple of months later, five detectors boasted perfect scores.
How We Tested Understanding Our Testing Process
To evaluate AI detectors, we used five text blocks: two written by a human (the author) and three generated by ChatGPT. Each block was separately analyzed by multiple detectors, with tests considered successful if the detector correctly identified the text source.
A detector was considered reliable if it scored over 70% accuracy. This method helps identify which tools offer dependable results and which may produce unreliable outputs.
“Five detectors correctly identified human and AI text in all tests.
David Gewirtz, Senior Contributing Editor
Key Findings Overall Results: Performance of AI Content Detectors
The testing series included ten detectors: BrandWell, Copyleaks, GPT-2 Output Detector, GPTZero, Grammarly, Monica, Originality.ai, QuillBot, Undetectable.ai, Writer.com, and ZeroGPT.
Five detectors, including Monica and Originality.ai, correctly identified both human-written and AI-generated text in all tests. This highlights the ongoing evolution of these tools.
It is important to note that these tools are not infallible. Results can vary, and it's prudent to use caution when solely relying on any single detector.
Explore AI Detection Tools
Test these detectors yourself and see the results!
Copyleaks
Test your content using Copyleaks' AI detection capabilities.
Originality.ai
Verify your content's authenticity with Originality.ai.
GPTZero
Evaluate the origin of your text with GPTZero.
Detailed Review Individual Detector Performance Analysis
Each detector was assessed individually, with accuracy percentages and insights into their strengths and weaknesses. The analysis includes BrandWell, Copyleaks, GPT-2 Output Detector, GPTZero, Grammarly, Monica, Originality.ai.
For example, Monica and Originality.ai showed perfect accuracy, while others like BrandWell and Grammarly demonstrated lower reliability.
The reviews provide an in-depth look at what each tool offers, helping readers make informed choices based on their needs.
“I would advocate caution before relying on the results of any -- or all -- of these tools.
David Gewirtz, Senior Contributing Editor
Conclusion Navigating the Future of AI Content Detection
While several tools offer strong performance, it is advisable to approach all detectors with caution. Consider the potential for false positives and negatives, particularly when dealing with non-native English writing styles.
The best approach involves using multiple detectors and integrating human review. Stay informed about the latest advancements in AI content detection to ensure your content remains authentic and credible.