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AI Text Detector for Essays and ChatGPT Writing

Paste an essay, paragraph, review, or message into this AI text detector to check whether it was written by ChatGPT or another LLM. Slop or Not reads the passage with a fine-tuned transformer trained on millions of human and AI samples. Online checks stay away from outside AI companies, and the iPhone and Mac app runs the same model on-device.

Catches 99.5% of AI text at a 5% false-positive rate, scored by RAID, the public benchmark, not by us.

Paste a paragraph or a whole thesis. The iPhone and Mac apps have no word cap and no monthly word budget.

  • Paste English textSchool essays, product reviews, captions, articles, and social posts up to 20,000 characters.
  • ResultA probability verdict, AI score, and readability analysis.
  • PrivacyDeleted the moment the check finishes. We never keep your text.
English text only. Deleted after processing.0/20000

Try an example

AI detection is probabilistic. Results can vary with new AI models and evasion methods. Human writing that sounds formal can be flagged as AI.

Scored by a fine-tuned transformer model, not a word-pattern checker.

What it checks

Paste Writing Into a Text-Only AI Check

Language patterns common in LLM-written text

Sentence and paragraph regularity that differs from human drafts

Hidden characters flagged before you submit, with a cleaned copy offered after the verdict

Good Uses

  • Checking essays, resumes, reviews, or messages
  • Screening longer drafts in 20,000-character online submissions
  • Pairing AI detection with readability review in the native app

Limits to Know

  • Short text leaves less evidence than full paragraphs
  • Humanized or heavily edited AI text can be harder to flag
  • Detection should support review, not replace judgment

FAQ

AI Text Detector Questions

How accurate is the AI text detector?

On RAID, the public AI-text-detection benchmark (ACL 2024), the model caught 99.5% of AI-generated text at a 5% false-positive rate across 11 generator models, 8 domains, and 11 adversarial attacks, which put it in the top 10 of 39 detectors as of August 2026. No AI detector is 100% accurate, so treat results as supporting evidence.

Can it detect ChatGPT text?

It detects writing patterns typical of ChatGPT and other LLMs. No AI detector is 100% accurate, so treat the result as supporting evidence, especially for short, edited, or deliberately obfuscated text.

Does the online text checker store my writing?

Online checks run on a private Mac server, are deleted after processing, and are not shared with third-party AI providers. Native app checks run on-device.

Is there a word limit?

Not in the iPhone and Mac apps. No cap per document, and no monthly word allowance to run down. Free users get a set number of checks each day, and Pro removes that cap. The browser checker accepts up to 20,000 characters per submission, so split longer documents into parts.

Run the Next Check on Your iPhone or Mac

The Slop or Not app checks images and text on-device, so nothing you check ever leaves your device.

Download on the App Store4.319 ratings across iPhone, iPad & Mac

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