# AI Text Detection API

> Detect AI-generated text from ChatGPT, Gemini, Claude and more via REST API. Independently tested accuracy, 30+ languages, and explainable AI Logic.

The Copyleaks AI Text Detection API tells you whether text was written by a human or generated by an AI model such as ChatGPT, Gemini, or Claude. For each section of text it returns a classification (human or AI), plus an overall human-versus-AI summary, and it explains results with AI Logic - so you can spot AI-generated content across 30+ languages with independently tested accuracy and very few false positives.

![Detect AI-generated Content](/assets/mainpage/AI-Detector-AI-Insights-1.svg)

## Why Detecting AI Content Matters

Generative AI tools have completely changed how we create content. They're amazing tools, but sometimes you really need to know that content is authentic:

- **Academic Honesty**: We want to empower students to develop their own writing skills and critical thinking
- **Content Quality**: Your readers trust that content comes from real human experience and expertise, while content generated by LLMs often contains inaccuracies or lacks depth
- **Brand Trust**: Your audience expects you to be upfront about how your content is created
- **Legal Requirements**: Some fields actually require proof that humans wrote the content

AI-generated text can look exactly like something a person wrote. Our detection API helps you tell the difference, so you can keep things authentic and trustworthy in a world where AI is everywhere.

## Core Capabilities

<CardGroup cols={2}>
    <Card title="Spot AI Content Reliably" icon="bullseye">
      Our detector has been tested by independent researchers and catches AI-generated text with excellent accuracy and very few false alarms.
    </Card>
    <Card title="Works with All AI Models" icon="robot">
      Detects text from ChatGPT, Gemini, Claude, DeepSeek, and new AI models as they come out.
    </Card>
    <Card title="Works in 30+ Languages" icon="language">
      Find AI content in English, Spanish, French, German, Chinese, Arabic, and [many other languages](/reference/actions/miscellaneous/ai-detection-supported-languages).
    </Card>
    <Card title="Finds Mixed Content" icon="layer-group">
      Spots AI text even when it's mixed with human writing, showing you exactly which parts are AI-generated.
    </Card>
</CardGroup>

## Features

Since the inception of LLMs we have been rigorously testing and improving our detection tools. The result is a powerful and flexible API which can be used with confidence. Our AI detection gives you all the details you need to make confident decisions about content authenticity.

![AI Detection Logic](/assets/mainpage/AI-Logic-1024x670.webp)

### Exceptional Accuracy

Our [AI Detector](https://copyleaks.com/ai-detector) has been independently tested, both internally as well as by 3rd party researchers, and shown to have exceptional accuracy in identifying AI-generated text, with very low false positive rates. In addition, we are constantly updating our detection algorithms making sure we are up-to-date with the latest generative AI models.

[**Learn more**](https://copyleaks.com/ai-detector/testing-methodology)

### AI Logic - See Why Content Was Flagged

Instead of just saying "this looks like AI," we show you exactly why. You get clear explanations that help you make confident decisions.

- **Find AI Sources**: See when copied content comes from AI-generated websites
- **Highlight AI Phrases**: Points to specific sentences that sound like AI writing
- **Compare Patterns**: Shows how the text compares to known human vs AI writing styles
- **Get Clear Reasons**: Understand exactly why something was flagged as AI

[**Learn more**](/concepts/features/ai-logic)

### Detecting Text Manipulation Attempts

People try to trick AI detectors by changing the text. We can spot these tricks.

- **Changed Characters**: Finds when people replace letters with similar-looking symbols
- **Text Spinners**: Catches content that's been run through text-changing tools
- **Hidden Text**: Spots invisible characters that people add to fool detectors
- **Heavy Edits**: Finds heavily modified AI text that's meant to look human

[**Learn more**](/concepts/features/text-manipulation)

### Choose Your Detection Level

Pick how sensitive you want the detection to be:

- **Level 1**: Catches text copied straight from AI tools like ChatGPT
- **Level 2**: Finds AI text with small changes like different tenses
- **Level 3**: Spots heavily edited AI content that's been changed a lot

[**Learn more**](/reference/actions/writer-detector/check)

### Enterprise-level Trust

Safe and secure for companies and schools:

- **Security**: Your data is protected with military-grade encryption
- **Privacy**: Meets GDPR and other privacy regulations
- **Certifications**: SOC 2 & SOC 3 certified for enterprise use

[**Learn more**](/concepts/security/overview/)

## Use Cases

<Tabs>
  <Tab title="Education">
    Check if students used AI to write their essays and assignments. Combine with plagiarism checking to make sure work is both original and human-written.
    
    [**Learn more**](/concepts/use-cases/academic-integrity)
  </Tab>
  <Tab title="Publishers">
    Make sure articles and posts are written by real people before you publish them. Keep your readers' trust by avoiding AI-generated content.
    
    [**Learn more**](/concepts/use-cases/publishers)
  </Tab>
  <Tab title="User-generated Content">
    Spot fake AI reviews, comments, and posts. Keep your community real and trustworthy by catching artificial content.
    
    [**Learn more**](/concepts/use-cases/user-generated-content-platforms)
  </Tab>
</Tabs>

## Works Better Together

Our AI detector works great with our other tools to give you complete content checking.

<CardGroup cols={2}>
  <Card title="Plagiarism Checker" icon="magnifying-glass" href="/concepts/products/plagiarism-checker-api">Find copied content from billions of online sources and make sure everything is original.</Card>
  <Card title="Grammar Checker" icon="spell-check" href="/concepts/products/writing-assistant-api">Help improve writing without triggering AI detectors - safe grammar and style suggestions.</Card>
</CardGroup>

## Next Steps

Ready to add reliable AI detection to your app?

<CardGroup cols={2}>
  <Card title="Start Building" icon="rocket" href="/guides/ai-detector/ai-text-detection">Follow our simple guide to add AI detection to your application.</Card>
  <Card title="Try it" icon="flask" href="https://copyleaks.com/ai-detector">Test our AI detector with your own text and see how it works.</Card>
  <Card title="API Documentation" icon="code" href="/reference/actions/writer-detector/check">See all the technical details for our AI detection API.</Card>
  <Card title="Understanding AI Logic" icon="brain" href="/concepts/features/ai-logic">Learn how AI Logic shows you why content was flagged as AI.</Card>
</CardGroup>

## Frequently asked questions

### What is the Copyleaks AI Text Detection API?

It is a REST API that classifies text as human-written or AI-generated. You submit text, and the API returns a per-section classification (human or AI), an overall human-versus-AI summary, and AI Logic explanations of why content was flagged.

### Which AI models can it detect?

The detector identifies text from ChatGPT, GPT-4, Gemini, Claude, DeepSeek, Llama, and other large language models, and is continuously updated as new models are released.

### How accurate is Copyleaks AI detection?

Accuracy has been verified both internally and by independent third-party researchers, showing high detection rates with very low false-positive rates. See the [testing methodology](https://copyleaks.com/ai-detector/testing-methodology) for details.

### Which languages does it support?

AI text detection works in 30+ languages, including English, Spanish, French, German, Chinese, and Arabic. See the [full list of supported languages](/reference/actions/miscellaneous/ai-detection-supported-languages).

### Can it detect AI text that was edited or paraphrased?

Yes. Configurable [detection levels](/reference/actions/writer-detector/check) catch everything from text copied straight from an AI tool to heavily edited or paraphrased AI content, and the API also flags [text-manipulation attempts](/concepts/features/text-manipulation) like character swaps and hidden characters.

### How do I start using the API?

Follow the [AI text detection guide](/guides/ai-detector/ai-text-detection) to authenticate, submit text, and read results, or see the [API reference](/reference/actions/writer-detector/check) for endpoint details.

<Card title="Want to See It in Action?" icon="calendar-check" href="https://copyleaks.com/book-a-demo" cta="Book a Demo" arrow="true">
  Get a personalized demo and see how easy it is to add AI detection to your app. We'll show you AI Logic and help you pick the right settings for your needs.
</Card>