Best AI Detectors

On this page you will find a comprehensive list of the best AI detectors currently available.

All AI content detection tools listed here have been thoroughly tested throughout multiple GPT models. 

We will continuously update this page with new tools and findings.

Best AI Detectors of 2023

Whether you’re a content creator looking for solutions to make your AI-written content undetectable by search engine algorithms… 
Or a vigilant teacher who is suspicious about a student’s essay sounding a bit too much like Shakespeare for a 10th grader…

Fact is, you came looking for the best AI detectors – and we’re going to give you exactly that.

#1 AI Content Detector

Best AI Detector - Winston AI

– Highest accuracy in detecting AI content
– Reliable for new GPT models (GPT 4+)
– No false positives*

0,015$ per 100 words

#2 AI Content Detector

Best AI Detector Tool Alternative

– High accuracy in detecting AI content
– Reliable for new GPT models (GPT 4+)
– Paraphrased Content Detection

$0,01 per 100 words

#3 AI Content Detector

AI Detector Tool - Passed AI

– Best for academic purposes
– High accuracy on GPT < 4 models
– Document audit and writing visualization

$0,05 per 100 words

We have tested many paid and free tools (all of which will be reviewed below).
However, we did not just keep our own findings into account.

We looked at other high authority blogs and took notes from video’s of popular content creators within the niche of AI generated content. We did our research and we did it well.

Based on this research we can confidently say that the 3 tools mentioned above are your best bet when it comes to detecting AI written content. The current leaders in the current market of AI Detectors. Period.

There are many alternatives, both free and paid options. 

How do AI Detection Tools Work?

Just like a regular AI content generation tool, AI detectors use machine learning and natural language processing (NLP). These tools were designed to analyze patterns, look for inconsistencies, as well as other factors that are often found in AI-generated content.

This includes repetition, unusual phrasing, and inconsistencies in tone or style.

Some AI detectors also look for more subtle signs, such as the overuse of certain words or phrases, or patterns in sentence structure that are typical of AI writing models.

AI detectors are trained on datasets of both human-written and AI-generated text, allowing them to develop a model that can accurately distinguish between the two.


As for every other AI tool out there, the premise stays the same: The more data the tool has been trained on, the more accurate and better it is likely to be.

Key Takeaways

Can AI detection be wrong?

Yes, AI detection can be wrong. And there are several reasons for that, some of which we already touched on. For instance, if the AI writing model that generated the content is very new or unique, the detector may not have been trained on similar data and may therefore struggle to identify it correctly. Similarly, if the human-written text contains characteristics that are commonly associated with AI-generated content, it may be incorrectly flagged.

AI writing tools, such as ChatGPT; are becoming increasingly better and more sophisticated. Essentially being able to write more “human-like” text. Thus making it harder and harder for these AI detector tools to “sniff out” what is real and what isn’t.

The Accuracy of AI Detectors

There are a variety of factors that can impact the accuracy of an AI detector.

  1. The sophistication of the tool’s algorithms. This is what usually seperates a paid AI detection tool from a free one. More advanced algorithms are typically able to detect more subtle nuances in text, leading to increased accuracy.

  2. The amount and quality of data that the tool has been trained on. We mentioned this before, but we can’t emphasize the importantance of this enough. Tools that have been trained on larger and more diverse datasets are generally more accurate than those that have been trained on limited or biased data.

The key takeaway is: even the most advanced AI detectors are not entirely flawless. While some detectors, such as Winston AI and Originality AI, have been reported to have accuracy rates of over 90% (which is more or less in line what we found during our tests), it’s important to remember that no tool is 100% accurate.

Which is the most accurate AI detector?

Winston AI takes the lead in terms of accuracy in detecting AI written content.
This is based on a variety of tests across various GPT models, both old and newer versions. 
While Winston is the best at detecting AI-written content, it (currently) lacks in detecting content that has been paraphrased.

Best AI Detectors - Tool Reviews

Winston AI Review

Winston AI could be seen as one of the current market leaders among AI detection tools. Look at any blogs and video’s online, chances are very high that Winston will be at the top of the recommendation list.

After various tests, using multiple AI detection tools across multiple models (GPT 3.5 & GPT 4), we understand why this is the case:

  • Most accurate detection rate: Across all of our tests, it was Winston that came out ahead each time
  • Reliable for advanced models: Most AI detectors seem to perform quite well when it comes to older GPT models, but seem to lack when it comes to the more recent & advanced ones.
  • No false positives
Best AI Detector - Winston AI

Who can use Winston AI?

Winston is rapidly gaining popularity among educators. However, it is suitable for anyone looking to validate any type of written content.

How accurate is Winston AI compared to other tools?

Among all the AI content detection tools that we tested and reviewed, Winston AI took the lead. Overall the highest accuracy scores, the highest AI detection rate and returning no false positives.

What are the special features of Winston AI?

  • Winston AI offers more than just AI detection:
  • Plagiarism detection
  • Readability score
  • Extract text from scanned documents, pictures, and handwritten notes using OCR technology.
  • AI prediction map that highlights parts of the text it considers to be AI-generated.

How much does Winston AI cost?

It is free up to a limit of 2,000 words per month. Next to that they have monthly and yearly plans. Cheapest plans start at 12$ for a total of 80.000 words per month.

Does Winston AI offer any customer support?

Yes, both free and paid plans of Winston AI offer email and chat support.

What languages does Winston AI support?

At the moment of writing, Winston AI supports English and French. They do plan to add more languages in the future. (Note: All of our own tests in order to determine AI detection accuracy was done with English written content.)

Originality AI Review

Originality proudly dubs themselves the most accurate AI detection tool on the market, across all GPT-models.

And the fact of the matter is: it’s close.

In our tests, they had a slightly less accuracy score compared to Winston (more specifically in the most advanced GPT model).


Originality does take the lead when it comes to detecting paraphrased content. And this is equally as important in our opinion.

Best AI Detector Tool Alternative

AI content detector Originality AI – Main Features:

Some of the most important features that make Originality stand out from other AI detectors are:

  • Its ability to detect across various GPT-models accurately (GPT-3, GPT-4, GPT-3.5 and older versions)
  • Team management functionality: Great for larger content teams, publishers and/or educators
  • Ability to easily conduct a complete AI content and plagiarism audit for an entire website
  • Chrome extension: Easily scan for AI-written content using their extension
  • Ability to scan Google Docs, emails, WordPress content etc

Is Originality free?

Unfortunately, no. Just like most paid AI detectors, Originality works with a credit system. 100 words = 0.01$. These credits can be purchased, with a minimum spend of $20. Yes, that’s 200k words. Trust me, this will keep you going for a while.

Detecting paraphrased AI content

An AI paraphrasing tool will rewrite the AI-generated content that you input. In essence, making it “more human-like” and thus harder for an AI detection to, well, detect it.During our testing, Originality was the most accurate when it came to detecting paraphrased content. Which is a very important feature of its own.

In case you’re wondering: The most popular and reliable AI paraphrasing tool at this moment is Quillbot.

Passed AI Detector Review

Passed AI has emerged as a prominent AI detection tool in the education sector. It focuses on detecting AI-generated content and plagiarism, ensuring the authenticity of submitted assignments. Their main goal is to preserve the integrity of academic work.

Passed AI has a reported accuracy rate of 94%. This does align with our own findings, however it is important to note that this only reflects on older GPT-models like GPT-2, GPT-3, GPT-3.5, GPT-J, and GPT-NEO.

One of its main features is its ability to perform an entire document audit trail. This allows you to decipher the exact activity used to create certain content.

AI Detector Tool - Passed AI

Passed AI – Best AI Detection for Educators

What AI models can Passed AI detect?

Passed AI can accurately detect content generated by GPT-2, GPT-3, GPT-3.5, GPT-J, and GPT-NEO.

How does the document history audit feature work?

The document history audit feature allows tracking of changes, inserts, deletions, and alterations in a document. It also provides a replay tool and history report, offering transparency into a student’s writing process.

What is the pricing structure for Passed AI?

Passed AI offers a $9.99 monthly subscription that includes unlimited scans and 200 free monthly credits. Users can also purchase additional credits.

How does Passed AI ensure the security of my data?

Passed AI uses military-grade 256-bit encryption to protect your private information, ensuring high-level data security.

Is Passed AI compatible with other long-form editors besides Google Docs?

Currently, Passed AI integrates only with Google Docs via a Chrome extension. However, it has plans to expand compatibility with other platforms in future updates.