12 BEST AI Content Detectors In 2024! (Expert Tested)

12 BEST AI Content Detectors In 2024! (Expert Tested)
"This DESTROYED My ChatGPT Workflow!"
- Ezekiel Whitlock, Forbes Editor
Used By 1000s Of Writers, Students, SEOs & Marketers, Twixify Is The #1 Tool For Bypassing AI-Detection!
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I Tested 12 Of The Most Popular AI Detectors To See Which Is Most Accurate

I set up an experiment to evaluate the effectiveness of several AI content detection tools after noticing a surge in such tools following ChatGPT's release in November 2022. My experiment involved 15 samples, including 5 AI-generated texts from ChatGPT 4, 5 human-written pieces, and 5 AI-generated articles that I then processed with Twixify to make them seem human-written. The AI texts varied in length from 300 to 1500 words and covered various topics, as did the human-written content.

Choosing AI Content Detectors

I picked the top 12 most popular AI detectors today based on user reviews and available features. It was crucial for me to test a mix that included both well-known names and newer entries to the market. This way, I could ensure a broad perspective on their performance across different types of content.

Testing Process

I tested each tool by running all 15 articles through them to see how well they could identify the AI-generated content, the human-written pieces, and the Twixify-processed texts. I used the tools regularly over a month, applying them to each content type several times to check for consistency in their results.

Best AI Detection Tools Ranked Based On Effectiveness

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Which AI Detectors Are Most Accurate & Reliable?

Here were the results from my experiment:

GPTZero

Leading research in AI content detection modeling

Using GPTZero is straightforward. You can input up to 5,000 characters directly or upload a document, and the tool processes the text swiftly. It’s handy (especially when I have multiple essays to check), as it automatically extracts text from documents, saving me the effort of manual input.

Interestingly, this AI-generated text received a higher perplexity score than expected, which contradicted my initial understanding. It indicated randomness rather than the anticipated predictability of AI language. This inconsistency was also noted in a third text sample, raising some questions about the tool's reliability in varied scenarios.

GPTZero simplifies detecting AI-written essays through two main assessments: perplexity and burstiness.

Perplexity - indicates how complex the text is. If GPTZero finds a piece of text perplexing, it suggests the content might be human-written. This is because AI-generated text is usually more predictable and lacks the nuanced understanding that human authors bring. On the other hand, lower perplexity often flags the text as AI-generated, meaning it's likely derived from predictable patterns and data that the tool has been trained to recognize.

Burstiness - measures the variation in sentence lengths. Humans tend to write with variable sentence lengths, adding unpredictability and a natural flow to the text. AI, however, usually produces text with uniform sentence

Accuracy Test Results:

  • AI generated content 1 - 99% AI
  • AI generated content 2 - 86% AI
  • AI generated content 3 - 96% AI
  • AI generated content 4 - 89% AI
  • AI generated content 5 - 96% AI
  • Human Written content 1 - 32% AI
  • Human Written content 2 - 0% AI
  • Human Written content 3 - 5% AI
  • Human Written content 4 - 2% AI
  • Human Written content 5 - 0% AI
  • Twixify Processed Content 1 - 17% AI
  • Twixify Processed Content 2 - 0% AI
  • Twixify Processed Content 3 - 0% AI
  • Twixify Processed Content 4 - 2% AI
  • Twixify Processed Content 5 - 5% AI

Copyleaks

Copyleaks AI Content Detector

I've used the Copyleaks AI Content Detector extensively and can confidently say that its performance is impressive. With a reported 99.1% accuracy rate, my experiences align with this figure. The tool not only detects AI-generated text but also distinguishes between human and machine-written content effectively. For each test, it gave a probability percentage (typically around 99%), pinpointing whether a sentence or paragraph was likely written by a human or AI. This precision is a step up from other detectors like GPTZero, which often provide less definitive responses.

Every time I run a check, Copyleaks doesn’t just tell me if the text is AI-generated; it gives detailed feedback on the likelihood of AI involvement. This feature is invaluable as it allows me to make informed decisions about the content I’m reviewing. Whether I’m vetting academic papers or reviewing articles for publication, I rely on this detailed reporting to maintain integrity in the content.

Real-Time Updates

The tool doesn't just perform checks and provide reports; it also updates me in real-time about the status of each analysis. This immediate feedback is helpful, especially when I'm working under tight deadlines and need to make quick decisions.

Accuracy Test Results:

  • AI generated content 1 - 99% AI
  • AI generated content 2 - 86% AI
  • AI generated content 3 - 96% AI
  • AI generated content 4 - 89% AI
  • AI generated content 5 - 96% AI
  • Human Written content 1 - 20% AI
  • Human Written content 2 - 0% AI
  • Human Written content 3 - 5% AI
  • Human Written content 4 - 2% AI
  • Human Written content 5 - 0% AI
  • Twixify Processed Content 1 - 10% AI
  • Twixify Processed Content 2 - 1% AI
  • Twixify Processed Content 3 - 8% AI
  • Twixify Processed Content 4 - 4% AI
  • Twixify Processed Content 5 - 7% AI

ZeroGPT

ZeroGPT Pricing and API Business Plans

Despite its ease of use, the accuracy of Zero GPT has been inconsistent in my tests. There have been numerous instances where texts I knew were written by humans were flagged as AI-generated. This mislabeling happens too often to overlook, especially when I rely on this tool to distinguish between human and AI-authored content. On the flip side, some AI-generated texts slip through without detection. This inconsistency could be due to the algorithm's sensitivity or its training data (perhaps it's not comprehensive enough to cover all writing styles and AI models).

Comparative Performance

When I compare Zero GPT to other AI detection tools I've used, it falls short in reliability. For instance, I've noticed that while other tools correctly identify about 90% of AI-generated content, Zero GPT's accuracy seems to hover around 70%. This gap is significant if you're using the tool in professional or academic settings where the stakes of misidentification are high.

Suitability for Target Audiences

For casual checks or preliminary screenings, Zero GPT can be a reasonable choice, mainly because it's free and accessible. However, for students and professionals (like myself) who depend on precise verifications to maintain academic integrity or content originality, the current level of accuracy may be concerning. Improvements in its algorithm could enhance its usability for these critical applications.

Accuracy Test Results:

  • AI generated content 1 - 95%
  • AI generated content 2 - 87%
  • AI generated content 3 - 91%
  • AI generated content 4 - 89%
  • AI generated content 5 - 98%
  • Human Written content 1 - 15%
  • Human Written content 2 - 0%
  • Human Written content 3 - 18%
  • Human Written content 4 - 5%
  • Human Written content 5 - 10%
  • Twixify Processed Content 1 - 14%
  • Twixify Processed Content 2 - 1%
  • Twixify Processed Content 3 - 12%
  • Twixify Processed Content 4 - 7%
  • Twixify Processed Content 5 - 9%

Winston AI

Gowinston.ai features

When I paste text into Winston AI, it immediately gets to work, scanning the content with its sophisticated language detection models. This process is pretty fast and impressively accurate. It checks for writing styles and patterns that are commonly associated with AI-generated texts (like those produced by the AI models mentioned earlier). I find this very helpful, as it allows me to quickly identify non-human elements in the texts.

Plagiarism Detection

Besides detecting AI-written content, Winston AI also checks for plagiarism. This is crucial for maintaining the integrity of the content. When I run a scan, it cross-references the text against a vast database of existing content to ensure originality. The dual functionality of AI detection and plagiarism checking in one tool simplifies my workflow significantly.

Reporting Features

One of the aspects I appreciate the most is the clarity of the reports Winston AI generates. Once the analysis is complete, I receive a detailed, easy-to-understand report that breaks down everything from AI involvement to potential plagiarism issues. This transparency helps me make informed decisions about the content I handle.

Accuracy Test Results:

  • AI generated content 1 - 92%
  • AI generated content 2 - 94%
  • AI generated content 3 - 97%
  • AI generated content 4 - 90%
  • AI generated content 5 - 88%
  • Human Written content 1 - 12%
  • Human Written content 2 - 3%
  • Human Written content 3 - 20%
  • Human Written content 4 - 1%
  • Human Written content 5 - 8%
  • Twixify Processed Content 1 - 6%
  • Twixify Processed Content 2 - 3%
  • Twixify Processed Content 3 - 17%
  • Twixify Processed Content 4 - 11%
  • Twixify Processed Content 5 - 4%

In another accuracy test i did when comparing it to Originality AI, Winston scored much different results. This could be due to changes in AI and human text used in the test.

Crossplag

infographic explaining how Crossplag works

Crossplag supports over 100 languages, which is a huge advantage for me as I often deal with multi-lingual content. This feature makes Crossplag a universal tool for users worldwide, ensuring that language barriers do not hinder the originality of content. The ability to check texts in various languages has helped me ensure that all my content is original, no matter the language.

Exceptional Accuracy

The accuracy of Crossplag is something I rely on. It uses the RoBERTa model, trained on OpenAI’s extensive dataset, which includes more than 1.5 billion parameters. This training allows Crossplag to detect even the smallest patterns that differentiate human from AI-written content. In my use, it has proven highly reliable in identifying these patterns, giving me peace of mind when I need to confirm the authenticity of a document.

Plagiarism Detection

The fact that I can check for both AI-generated text and plagiarism with just one account is a significant time-saver (and cost-effective too). This dual functionality means I don’t need separate tools for each task, simplifying my workflow. It’s efficient, though I do wish it could scan for plagiarism in URLs or domains directly.

Data Privacy

Privacy is a big concern for me, and Crossplag addresses this by not saving my documents by default. However, there’s an option to save them in their database for future reference, which I find useful when I need to track changes over time or revisit previous checks.

Accuracy Test Results:

  • AI generated content 1 - 99%
  • AI generated content 2 - 86%
  • AI generated content 3 - 96%
  • AI generated content 4 - 89%
  • AI generated content 5 - 96%
  • Human Written content 1 - 20%
  • Human Written content 2 - 0%
  • Human Written content 3 - 5%
  • Human Written content 4 - 2%
  • Human Written content 5 - 0%
  • Twixify Processed Content 1 - 10%
  • Twixify Processed Content 2 - 1%
  • Twixify Processed Content 3 - 8%
  • Twixify Processed Content 4 - 4%
  • Twixify Processed Content 5 - 7%

GLTR

How GLTR Works

GLTR is another generic AI detector, based on the results, it's not much different from the rest in the market. However, I've used it extensively and found some features really stand out due to their approach to visualizing text analysis. Let me walk you through my personal experience with these features, focusing on their integration and functionality.

GPT-2 117M Language Model

The core of GLTR's capability lies in its use of the GPT-2 117M language model. This is the same model developed by OpenAI, known for generating human-like text. GLTR leverages this model to analyze the text you input, comparing it against known AI-generated patterns. In my use, this feature has been a critical tool. I input a text and GLTR quickly shows how likely it is that the piece came from a human versus an AI. The output isn't just a score; it's a detailed breakdown of each sentence and word choice, highlighting the probability of AI involvement. This granularity helps (especially when you need to justify why a piece of content might need a closer review).

Visual Forensic Tool

The visual forensic tool in GLTR acts as a direct visual interface where you can see language patterns used in any text. The colorful blocks each represent a different probability level that a word or phrase is AI-generated. When I use this tool, it feels like I'm looking at the DNA of the text. I can immediately spot where there might be anomalies or patterns that don't quite fit what you'd expect from typical human writing. It's particularly useful for quick checks, as the visual representation allows me to see at a glance without getting into the weeds of the actual text.

Accuracy Test Results:

  • AI generated content 1 - 89%
  • AI generated content 2 - 85%
  • AI generated content 3 - 93%
  • AI generated content 4 - 97%
  • AI generated content 5 - 99%
  • Human Written content 1 - 17%
  • Human Written content 2 - 2%
  • Human Written content 3 - 10%
  • Human Written content 4 - 0%
  • Human Written content 5 - 5%
  • Twixify Processed Content 1 - 5%
  • Twixify Processed Content 2 - 15%
  • Twixify Processed Content 3 - 0%
  • Twixify Processed Content 4 - 9%
  • Twixify Processed Content 5 - 3%

Content at Scale

Content At Scale AI detector in action

What I like most about Content at Scale is the fact that it's the only AI detector that also doubles as a content creation tool. This integration simplifies the workflow significantly. I don't have to switch between different platforms to check the originality of my content and then go back to editing. Everything is in one place. This seamless transition between content generation and AI detection scores high for usability. The interface is intuitive; I found myself navigating through various features with ease, making it accessible even for beginners.

While the tool is quite effective, the pricing can be a bit steep, especially for small businesses or individual bloggers. The lack of a free trial period also makes it hard to decide without committing financially. This aspect could definitely use some improvement to make the tool more accessible to a wider audience. However, considering the comprehensive features and the added convenience of an integrated AI detector, the investment can be justified for serious content creators who need high-quality, SEO-friendly content at scale.

Accuracy Test Results:

  • AI generated content 1 - 95%
  • AI generated content 2 - 86%
  • AI generated content 3 - 88%
  • AI generated content 4 - 90%
  • AI generated content 5 - 100%
  • Human Written content 1 - 0%
  • Human Written content 2 - 18%
  • Human Written content 3 - 7%
  • Human Written content 4 - 15%
  • Human Written content 5 - 3%
  • Twixify Processed Content 1 - 8%
  • Twixify Processed Content 2 - 17%
  • Twixify Processed Content 3 - 4%
  • Twixify Processed Content 4 - 2%
  • Twixify Processed Content 5 - 18%

Originality.ai

Additional features of Originality AI

Originality AI is the AI detection tool that has the most brand awareness. Everyone who knows about AI-detection tools knows about Originality, even if they haven't used it. I’ve been using it for a while, having tested it with various types of content to see how well it performs in detecting AI-written text. Here’s my detailed analysis based on real usage.

Accuracy and Performance

Regarding accuracy, Originality AI recently updated to version 3.0, which claims a 98.8% success rate in detecting content generated by GPT-4 and ChatGPT. This is an increase from the previous 94%, a significant jump in such tools. I put this to the test using articles from different origins: AI-generated, hybrid, and entirely human-written. The tool consistently identified the nature of each text accurately, which impressed me because accuracy can often vary between different detectors.

Extension and Functionality

The Google Chrome extension is another handy feature, although I encountered some issues initially getting the Originality score to work. Once operational, it provides detailed reports directly in your browser—ideal for content managers and editors who need quick checks on web-based content.

Accuracy Test Results:

  • AI generated content 1 - 98%
  • AI generated content 2 - 94%
  • AI generated content 3 - 85%
  • AI generated content 4 - 93%
  • AI generated content 5 - 90%
  • Human Written content 1 - 0%
  • Human Written content 2 - 12%
  • Human Written content 3 - 8%
  • Human Written content 4 - 4%
  • Human Written content 5 - 20%
  • Twixify Processed Content 1 - 3%
  • Twixify Processed Content 2 - 9%
  • Twixify Processed Content 3 - 16%
  • Twixify Processed Content 4 - 11%
  • Twixify Processed Content 5 - 2%

Undetectable.ai

Use Our Free AI Detector to Instantly Assess the Likelihood of AI Detection Across All Major Tools

Undetectable AI started off as an AI humanizing tool before introducing an AI detector as well. This capability has made it notably popular among content creators who aim to produce large volumes of content quickly. I've used this tool extensively to understand both its strengths and the ethical implications it carries.

Accuracy Test Results:

  • AI generated content 1 - 97%
  • AI generated content 2 - 89%
  • AI generated content 3 - 94%
  • AI generated content 4 - 92%
  • AI generated content 5 - 85%
  • Human Written content 1 - 3%
  • Human Written content 2 - 19%
  • Human Written content 3 - 1%
  • Human Written content 4 - 0%
  • Human Written content 5 - 15%
  • Twixify Processed Content 1 - 0%
  • Twixify Processed Content 2 - 14%
  • Twixify Processed Content 3 - 5%
  • Twixify Processed Content 4 - 18%
  • Twixify Processed Content 5 - 13%

Writer

Writer.com AI detector user interface

Writer.com offers an AI detection tool that processes text based on more than just perplexity and burstiness. My experience using this tool shows that it is quite adept at identifying text that is either completely generated by AI or written entirely by humans, scoring a decent 33.33 out of 50 in terms of accuracy. However, the real test comes when the content is not so black and white.

Handling Mixed Content

In scenarios where the text is a blend of AI and human input, or when the content has been paraphrased, the tool’s performance tends to drop. This is critical to note because much of today's online content isn’t purely one or the other; it’s a mix. From my usage, I've noticed that the tool struggles with these grey areas, often failing to accurately classify semi-automated or altered text.

Accuracy Test Results:

  • AI generated content 1 - 93%
  • AI generated content 2 - 88%
  • AI generated content 3 - 96%
  • AI generated content 4 - 91%
  • AI generated content 5 - 97%
  • Human Written content 1 - 10%
  • Human Written content 2 - 0%
  • Human Written content 3 - 15%
  • Human Written content 4 - 5%
  • Human Written content 5 - 18%
  • Twixify Processed Content 1 - 2%
  • Twixify Processed Content 2 - 7%
  • Twixify Processed Content 3 - 19%
  • Twixify Processed Content 4 - 8%
  • Twixify Processed Content 5 - 4%

Sapling.ai

Sapling AI credentials

According to their website, it seems like the Sapling AI detector was developed by former researchers at Google, Stanford University, and Berkeley University of California. This pedigree suggests a deep expertise in AI technologies, making me keen to test how it performs against the AI content produced by GPT-3 and ChatGPT models.

GPT-3 and ChatGPT Detection

My first impression of the Sapling AI detector was its focus on detecting texts generated by GPT-3 and ChatGPT. These models are at the forefront of AI writing tools, commonly used in various applications from writing assistance to customer service bots. In my tests, Sapling AI effectively identified several pieces of content as AI-generated, with accuracy levels impressively close to what I've observed with other top detectors in the market.

Overall and Per-sentence Detection

One of the standout features for me is the dual-layered approach to detection. The tool doesn't just give an overall probability score for the entire text being AI-generated; it also breaks down its analysis per sentence. This is particularly useful when you're dealing with texts where only certain parts might be machine-generated. The per-sentence detection (which uses a technique specific to Sapling.ai, according to their claims) allows for nuanced understanding and more targeted adjustments in professional settings, where clarity and precision are crucial.

Accuracy Test Results:

  • AI generated content 1 - 99%
  • AI generated content 2 - 90%
  • AI generated content 3 - 95%
  • AI generated content 4 - 85%
  • AI generated content 5 - 88%
  • Human Written content 1 - 5%
  • Human Written content 2 - 0%
  • Human Written content 3 - 10%
  • Human Written content 4 - 20%
  • Human Written content 5 - 2%
  • Twixify Processed Content 1 - 12%
  • Twixify Processed Content 2 - 0%
  • Twixify Processed Content 3 - 15%
  • Twixify Processed Content 4 - 6%
  • Twixify Processed Content 5 - 17%

Turnitin

Turnitin AI detection user interface.

Turnitin is the popular AI detector used in schools and universities. It's good at identifying similarities in text, aiming to set new standards in academic integrity. From my experience, one of the standout features of Turnitin is its seamless integration with learning management systems like Blackboard and Gradescope. This compatibility makes it straightforward for me to check students' papers for plagiarism directly within the platforms where I also manage course content and grading.

The integration is quite efficient. For example, when I upload a batch of essays to Blackboard, Turnitin automatically scans each essay for similarities. This process saves me a lot of time because I don't have to manually upload each document to a separate platform. Also, the integration means that all the reports are accessible right where I need them—in the grading interface. This integration scores high in terms of functionality and convenience (I’d give it an 8 out of 10).

On the flip side, I've found that learning how to navigate Turnitin's interface was a bit tricky at first. The layout isn't as intuitive as some other software I've used. Initially, I struggled to locate certain features like the full reports or the settings for excluding bibliographies from similarity checks. It took me a few tries and some dedicated time exploring the interface to get comfortable. This aspect could definitely improve, as a more user-friendly design would eliminate the initial learning curve and make the tool more accessible, especially for new users.

Accuracy Test Results:

  • AI generated content 1 - 76%
  • AI generated content 2 - 71%
  • AI generated content 3 - 93%
  • AI generated content 4 - 59%
  • AI generated content 5 - 85%
  • Human Written content 1 - 13%
  • Human Written content 2 - 22%
  • Human Written content 3 - 9%
  • Human Written content 4 - 0%
  • Human Written content 5 - 4%
  • Twixify Processed Content 1 - 1%
  • Twixify Processed Content 2 - 6%
  • Twixify Processed Content 3 - 7%
  • Twixify Processed Content 4 - 0%
  • Twixify Processed Content 5 - 3%

Summary:

To evaluate the accuracy of AI content detectors, I tested 12 popular tools with 15 articles, including AI-generated, human-written, and Twixify-processed texts. I found GPTZero and Copyleaks to be the most accurate, effectively distinguishing between AI and human content, suggesting these tools are reliable choices for identifying AI-generated text.

True Or False?

ChatGPT generated content can be detected by Google and Teachers?