Checkfor

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Checkfor is an AI detection tool that identifies AI-generated text in various documents. It boasts 99.98% accuracy and is third-party verified, detecting models like ChatGPT, Claude, and Gemini.

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At a glance

Pricing

Freemium · Paid

Free tier

Yes

API

Skill level

Non-technical

About

What is Checkfor?

Checkfor, powered by Pangram, is an advanced AI content checker designed to detect AI-generated text with high accuracy. It identifies content from a wide range of AI models including ChatGPT 5, Claude Sonnet, Google Gemini, and even AI suggestions from tools like Grammarly and Quillbot. The tool is over 99% accurate and has been third-party verified by researchers at the University of Chicago and The University of Maryland. It supports multilingual detection across numerous languages and offers a low false positive rate of 1 in 10,000. Users can utilize Checkfor for essays, articles, and other documents to ensure content integrity.

Best used for

Ideal for writers, content creators, and students who need to verify the originality of text, detect AI-generated content, and ensure academic or professional integrity. Especially valuable for educators and publishers seeking to identify AI assistance or full AI generation in submitted works.

Common actions

detect AI content

verify text originality

check for AI writing

identify AI models

content integritytext analysisOriginality checkerAI writing detectioncontent authenticityai detectionPlagiarism checkerAI content

Capabilities

Key features

Detect AI-generated text
Multilingual AI detection
Identifies various AI models
Third-party verified accuracy
Low false positive rate
Detects AI writing suggestions

Target Audience

writercontent creatorstudentprofessor

Integrations

Not yet documented

Pricing & Plans

Freemium · Paid

Not Disclosed

FAQs

How many free checks does Checkfor offer daily?

Checkfor, powered by Pangram, offers four free checks per day after signing up for their free plan. This includes AI assistance detection, allowing users to regularly verify content without immediate cost.

What AI models can Checkfor detect?

Checkfor detects AI writing from a wide range of models, including ChatGPT 5, Claude Sonnet, Google Gemini, Deepseek, Meta AI, Grok, Llama, Mistral, OpenAI's o1, o3, Perplexity, and Deep Research. It also identifies AI suggestions from tools like Grammarly and Quillbot.

What is Checkfor's false positive rate?

Checkfor's false positive rate, which is the rate at which human-written documents are incorrectly flagged as AI, is currently 1 in 10,000. This metric is calculated from an aggregate of public datasets containing millions of documents.

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