AI Detector

When a Large Language Model writes a sentence, it uses all its pre-training data to create a response or an output based on statistical modeling. AI detectors can recognize this pattern and flag certain content as AI-generated because it significantly differs from the way humans write.

AI detectors can be trained on human-written content samples, so the presence of an AI text generator becomes clearer compared to human writing.

Copyleaks can detect content from:

• GPT-5, GPT-4, ChatGPT
• Claude
• Gemini
• DeepSeek
• Llama (Meta)
• Bloom
• Rytr
• Jasper

…and more.

Every new user receives a limited number of free credits to explore our AI and plagiarism detection tools before committing to a paid plan.

Our Personal and Pro plans both include full access to AI detection, plagiarism checks, detailed reports, and our explainable AI Logic feature. You can find detailed pricing information on our pricing page.

For education institutions or enterprise teams that require API access, LMS integration, or customized pricing, please contact our sales team to discuss a tailored solution.

Using AI technology, the detector can accurately recognize AI-generated text and the signals it leaves behind, adding a layer of accuracy.

Learn more about our AI Detector testing methodologies.

Copyleaks is an industry leader in accuracy, scalability, integration, and security. 

Several significant differences exist between our AI detection tool and the rest of the market. For example:

• We use large-scale, credible data with machine learning to understand text patterns, resulting in over 99% accuracy.
• We offer seamless API and LMS integrations.
• The detector can analyze and identify AI-generated code, even if altered.
• Our AI checker doesn’t flag non-AI features of Grammarly, like spell check and grammar, unlike other tools.
• All Copyleaks products are fully GDPR-compliant and certified to SOC 2 and SOC 3 standards.

Our models need a certain volume of text to determine AI presence accurately. More characters improve detection confidence.

AI Detector Browser Extension

• Minimum: 350 characters
• Maximum: 25,000 characters



AI Detector Web-Based Platform

• Minimum: 255 characters
• Maximum: 2,000 pages (no character max)

The likelihood of human-written content being mistakenly labeled as AI-generated is .03%—one of the lowest among AI detectors. 

We’re committed to digital trust and accuracy. To minimize false positives:

• Our algorithms distinguish human-generated text specifically.
• We utilize user feedback to enhance our models.
• New model detection is only introduced after extensive testing.

According to Cornell University, the answer is Copyleaks AI Detector. In July 2023, a study published on arXiv by Cornell Tech researchers declared Copyleaks AI Detector the most accurate for detecting LLM-generated text.

Further independent studies have validated its accuracy and efficiency.

Read more about these third-party studies.

Not all writing tool features are flagged. Grammarly’s AI-based rewriting features may trigger detection, while basic grammar and spell-check functions typically do not.

The AI Detector is designed to distinguish between minor edits and generative rewriting, helping ensure fair and accurate analysis.

Read the full analysis blog post here.

At Copyleaks, we prioritize data privacy and compliance. Current certifications include:

• SOC2 & SOC3
• GDPR
• PCI DSS
• NIST RMF


Visit our Compliance and Certifications and Security Practices pages to learn more.

Yes. Our detection report identifies specific elements written by humans and distinguishes them from AI-generated text, even when mixed.