AI Detector

Paste your content below, and we’ll tell you if any of it has been AI-generated within seconds with exceptional accuracy.


Certain platforms, like Grammarly, use ChatGPT and other genAI models for key functionalities and can be flagged as potential AI content. Learn more 

The Most Accurate AI Detector According to third-party studies and Trusted by Leading Organizations and Institutions

An award-winning enterprise AI detector that has you fully covered.

With over 99% accuracy, model coverage that includes ChatGPT, Gemini, and Claude, and detection in 30 languages, you’re fully covered with the market’s most comprehensive AI detector and checker.

Combined with the award-winning Plagiarism Detector, Codeleaks Source Code Detector, and the all-new Writing Assistant, it’s the only full-spectrum suite dedicated to creating truly original, error-free content.

AI Engine

AI Detection Nearly A Decade In the Making

Since 2015, the Copyleaks AI engine has been learning how humans write by collecting and analyzing trillions of pages from user submitted inputs and more.

We Are Looking For Human Content, Not AI

Our AI engine has been trained to learn the patterns of human writing. Therefore, when the known patterns of human writing are disrupted, our AI flags it as potential AI content.

No one wants to fear false positives that can lead to false accusations. We tested over 20k human-written papers, and the rate of false positives was 0.2%, the lowest false positive rate of any ai detector available.

In addition, we are continually testing our AI Model and retraining it with new data and feedback, helping to improve accuracy.

Learn more about our AI Detector testing methodologies.

Get Started Today With the AI Detector

Key Features


Complete AI Model Coverage

AI detection across all AI models, including ChatGPT, Gemini, and Claude. Plus, once newer models are released, we can automatically detect it.

Unprecedented Speed and Accuracy

The AI Detector has over 99% overall accuracy and a 0.2% false positive rate, the lowest of any platform.

Learn more about our AI Detector testing methodologies.


Plagiarism and Paraphrased AI Detection

The AI Detector is the only platform with a high confidence rate in detecting AI-generated text that has been potentially plagiarized and/or paraphrased.


AI-generated Source Code Detection

Ensure full transparency with the only AI detector tool that detects AI-generated source code, provides code licensing alerts, and more.


Detect Interspersed AI Content

Have full transparency around the presence of AI-generated content even if the text has been interspersed with human-written content.


Military-Grade Security

All Copyleaks products boast military-grade security along with GDPR compliance and both SOC 2 and SOC 3 certification. For full security details, click here.

AI Detection Across Multiple Languages

  • English
  • Spanish
  • French
  • Portuguese
  • German
  • Italian
  • Russian
  • Polish
  • Romanian
  • Dutch
  • Swedish
  • Czech
  • Norwegian
  • Korean
  • Japanese
  • Chinese (Simplified)
  • Chinese (Traditional)
  • Arabic
  • Bengali
  • Bulgarian
  • Croatian
  • Greek
  • Hebrew
  • Hindi
  • Hungarian
  • Serbian
  • Thai
  • Turkish
  • Ukrainian
  • Vietnamese

For a full list of supported languages & accuracy, click here.

Ready to get started with the
AI Detector?

AI Detector Use Cases

AI Model Training

Safeguard your AI by ensuring your models are trained exclusively on human-written content, not AI-generated. 

Academic Integrity

Verify originality and ensure authenticity within all your academic content, from long-form essays to source code and everything in between. 


Mitigate risks, protect your copyright and IP, and establish guardrails for responsible GenAI adoption across your organization. 

Publishing & Copywriting

Ensure that what you’re publishing is original and authentic content, avoiding potential search engine penalties and other risks.

Oakland University Case Study

Learn how Oakland University adopted Copyleaks and changed the conversation around AI and plagiarism among their faculty and staff.

Oakland University

Campaign KPIs

Ease of use & Integration, Cost-effectiveness, Customer Support, Security

Safe Search Kids
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It is imperative that articles submitted by our writers are not only 100% unique, but also written by humans without the assistance of AI, particularly considering Google has been clear it will devalue content that is written by AI or simply a rehash of existing content. I use Copyleaks to ensure the authenticity of all content that gets posted to our site.

 Lowell Christensen, CEO, SafeSearchKids

Frequently Asked Questions

When a Language Model writes a sentence, it probes all of its pre-training data to output a statistically generated sentence, which is simply not how a human writes. It becomes apparent when analyzed against a vast corpus of human writing.

We can recognize AI text patterns utilizing multiple techniques.

Since 2015, we’ve collected, ingested, and analyzed trillions of crawled and user-sourced content pages from thousands of universities and enterprises worldwide to train our models to understand how humans write as opposed to AI.

Also, utilizing AI technology, our AI detector can accurately recognize the presence of other AI-generated text and the signals it leaves behind, adding an additional layer of accuracy.

There are several significant differences between other AI detector tools and ours.

For example:

  • Credible data at scale, coupled with machine learning and widespread adoption, allows us to continually refine and improve our ability to understand complex text patterns, resulting in over 99% accuracy—higher than any other AI detector—and improving daily.
  • As an enterprise-based platform, we’re the only solution with seamless API and LMS integrations, allowing you to bring the power of AI Detector directly to your native platform and at scale.
  • The AI Detector is the only platform to read source code, including AI-generated. Furthermore, it can detect source code at the function level, helping identify when code has been plagiarized or modified, even if certain variables have been altered or entire portions have been changed
  • Our AI Detector does not flag Grammarly’s non-AI features, which include spell check and grammar, as AI. Another AI Detector, in their own analysis, flagged 20% of Grammarly’s non-AI features as AI content, an astounding 20% false positive rate. Read the full analysis.
  • Our AI Detector, along with all of Copyleaks’ products, are fully GDPR-compliant and SOC 2 and SOC 3-certified, a global standard audited by KPMG, the leading auditing organization for certification, ensuring the privacy and protection of personal data.

The chance for content written by a human to be falsely labeled as AI-generated content is 0.2%, the lowest of any AI detector available. Nevertheless, we strive to inspire authenticity and digital trust by creating secure environments to share ideas and learn confidently, and that comes with the responsibility to ensure complete accuracy, particularly around false accusations. To address this, we have taken several precautions, including:

  • Our detection and the algorithms that power it are designed for detecting human-generated text versus AI-generated text. Detecting AI text tends to give a lower accuracy and increases the likelihood of false positives.
  • To help accelerate our learning and refine the models used, we implemented a feedback loop where users can rate the accuracy of the results, which allows us to continually use examples of false positives, rare as they may be, to improve.
  • We only introduce new model detection after thorough testing. Once our internal testing reaches a high confidence threshold, we leverage beta testers, giving an additional layer of assurance.

Yes. In July 2023, four researchers from across the globe published a study on the Cornell Tech-owned arXiv, declaring Copyleaks AI Detector the most accurate for checking and detecting Large Language Models (LLM) generated text. Since then, additional independent third-party studies have been released, each one highlighting the accuracy and efficiency of the AI Detector.

Read more about these third-party studies.

Only certain features of writing assistants can cause your content to be flagged by the AI Detector as AI-generated.

For example, Grammarly has a genAI-driven feature that rewrites your content to help improve it, shorten it, etc. As a result, this reworked content could get flagged as AI since it was rewritten by genAI. 

However, the Copyleaks Writing Assistant does not get flagged as AI or any content that Grammarly changed to fix grammatical errors, mechanical issues, etc., because it does not use or uses minimal genAI to power these features or functionalities.

Read our analysis about writing assistant tools getting flagged as AI.

At Copyleaks, our products are routinely undergoing independent verification of privacy, security, and compliance control to achieve certifications against global standards to earn and retain the trust of the millions of Copyleaks users worldwide. Our current Copyleaks certifications and compliance standards include SOC2 & SOC3, GDPR, PCI Payment Card Industry Data Security Standard, and NIST Risk Management Framework (RMF). Please visit our Compliance and Certifications and Security Practices pages to learn more.

Yes. Our detection report highlights the specific elements of the text written by a human and those written by AI, even if the text has been interspersed.

Read our Complete AI Detector FAQ Guide