AI Detector by Grammarly

Navigate responsible AI use with our AI checker, trained to identify AI-generated text. A clear score shows how much of your work appears to be written with AI so you can submit it with peace of mind.

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Responsible AI that ensures your writing and reputation shine

Acknowledge AI usage with instant citations formatted in MLA, APA, or Chicago style.

A New Standard of AI Detection
by the Leading Writing Assistant

Transparent, responsible AI use without all the guesswork: Grammarly’s AI content detector and writing assistant assess your work for you, so you know exactly where to refine and polish to make sure it’s authentically yours.

Detect AI-generated content from Grammarly and other tools like ChatGPT, Google Gemini, and Claude in seconds.

See what percentage of your text seems AI-generated so you can adjust it to sound more natural.

Properly cite your AI usage with Grammarly, so you can submit knowing you’ve triple-checked your work.

A Suite of Features for
Original Writing

Grammarly’s features, like AI content detection, plagiarism detection, and automatic citations, help you submit work with transparency and originality.

Bring transparency to
your work

Using a variety of text sources in your content? Grammarly Authorship automatically categorizes your text based on where it came from (AI, an online database, typed by you, etc.) so that you can easily show your work and confidently submit your most original writing.

Authentic authorship

Make it easy to disclose
your AI use

Grammarly's transparency features, such as AI checker, make it easy to acknowledge when you've used AI so you can submit work with integrity.

Be sure that your work is
one-of-a-kind

Grammarly helps you check your content for potential plagiarism and AI use so you can rest assured that what you're submitting is your original work.

Grammarly shows that 17% of your document matches 3 external sources

Get fully formatted citations
in seconds

Grammarly’s citation features give credit where it’s due. Get automated citations pulled directly from your browser, so you know you’re citing properly and adhering to the right guidelines.

Someone using the citation generator while writing a paper on anatomy

An AI Checker From a Brand
You Already Trust

As early as 2009, Grammarly has been the unrivaled leader in AI writing and communication assistance—and a steward of responsible AI.

Our world-class linguists and researchers help build Grammarly’s advanced writing assistance using methods like machine learning and deep learning. And they consistently break new ground in natural language processing (NLP) and generative AI. At every step of product development, we are committed to using quality datasets, mitigating bias, and supporting inclusive language.

This next step forward in AI detection is the latest commitment to safe, responsible AI innovation that safeguards your data and privacy.

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Go Beyond AI Detection With
Comprehensive Writing Support

Don’t wait until your final draft to get support. Grammarly helps at every step of the writing process, from brainstorming to revising. And Grammarly is the only AI writing partner that seamlessly integrates with 500,000+ apps and sites, making it easy to get real-time, strategic feedback.

Grammarly helps improve your paper with new ideas

Write strategically

Grammarly’s AI identifies your key points and helps you develop them so you can solidify your thesis and make your ideas flow logically.

A Grammarly user using paraphrasing functionality to shorten a Word Doc

Rewrite in one click

Use AI to tighten up wordy passages, clarify your points, and more.

Grammarly corrects your spelling and grammar

Check grammar, spelling, and more

Submit flawless writing with built-in proofreading that catches mistakes and improves clarity.

Grammarly product example shows brainstorming topics for your assignment

Jump-start and develop ideas with AI

AI features help you go from blank page to bright ideas by providing assistance with brainstorming, researching, and outlining.

See Why People Prefer Grammarly

of students using Grammarly report that Grammarly is an essential tool for them to do well in school.

of Grammarly users report that Grammarly gives them the confidence to write in their own voice.

of Grammarly users report feeling empowered when writing with Grammarly.

of Grammarly users report that Grammarly helps them create more persuasive and convincing writing.

Frequently Asked Questions

How is AI-generated content detected?

Grammarly’s AI detector tool displays a percentage that indicates how much of the text provided appears AI-generated, as assessed by our detection model. Our machine-learning model is trained on hundreds of thousands of human and AI-generated texts. Grammarly breaks your text into smaller sections, checking each section against the model for language patterns typically indicative of AI text. Grammarly then returns a % score, indicating how much of the provided text appears AI-generated. It assesses whether text resembles AI-generated writing; like other AI text checkers, it cannot provide a definitive conclusion. 

To learn more, visit our support page.

Do AI detectors actually work?

While AI detectors can help assess whether text appears to be AI-generated, currently there is no AI detector that can conclusively or definitively determine whether AI was used to produce text. That’s because the accuracy of these tools can vary based on the algorithms used and the specific characteristics of the text being analyzed. AI detection tools should be just one part of a holistic approach to evaluating writing originality.

Can AI checkers be biased?

Yes, AI content detectors can be biased. They may misinterpret writing styles and flag content as less authentic—especially with writers whose primary language is not English. This happens because AI often learns from a majority-language pattern, which might not account for the diverse ways people write. 

That’s why Grammarly is committed to building models using quality datasets that undergo comprehensive evaluations for bias and fairness. We design and develop products with our team of analytical linguists who apply their research and expertise to minimize bias and apply user feedback. Learn more about our principles of responsible AI development.

Is Grammarly’s AI content detector accurate?

No AI detector is 100% accurate. This means you should never rely on the results of an AI detector alone to determine whether AI was used to generate content. AI detectors can indicate characteristics found in human-written text as well as characteristics commonly found in AI-generated writing, such as language patterns that seem robotic or generic. But, they cannot definitively conclude whether or not AI was used. These tools should be one part of a holistic approach to evaluating writing originality.

Can ChatGPT be detected?

Yes, Grammarly’s AI detector and other ChatGPT checkers can identify text produced by AI models like ChatGPT, Gemini, Claude, Microsoft Copilot, and more. To learn more about all things AI, visit the Grammarly blog.

Why is my writing flagged for AI?

Your writing might be flagged for AI if it exhibits patterns, structures, or characteristics typical of text that has been created with generative AI. Learn more about why your writing may have been flagged on the Grammarly blog.

Where does Grammarly’s AI content detection feature work?

Grammarly's AI content detection feature is currently available for Grammarly Premium, Grammarly Business, and Grammarly for Education subscribers. Use it in Grammarly for Windows and Mac and the Grammarly Editor. It will soon become available for more of our product offerings, enabling you to check your text across even more applications and websites. The AI detector tool on this page is compatible with any browser. For guidance on getting started with Grammarly's AI detection feature, visit our support page.

Is using AI considered cheating?

What is and is not cheating can be subjective—what one professor considers acceptable might be off-limits to another. It also varies based on the assignment and how you intend to use AI. When writing in an academic setting, always comply with your institution’s and educator’s AI usage policies, typically found in course syllabi or academic-integrity guidelines.

If you use AI, we recommend you disclose it with a citation. Grammarly can instantly generate citations for AI usage when you use AI tools.