Top 3 Best AI Writing Detector Tools in 2024

Artificial intelligence (AI) has made incredible advancements in recent years. From beating humans at complex games like chess and Go, to generating human-like writing, AI is displaying more human capabilities every day. However, this also raises concerns about AI being used to generate content like essays, articles, and more that humans would normally write themselves. This has led to the creation of AI writing detector tools to identify text that may have been written by an AI. In this article, we will cover the top 7 best AI writing detector tools available today.

AI Writing Detector tools

What is AI Writing?

Before diving into the detection tools, let’s quickly go over what exactly AI writing is. AI writing refers to text that is generated by an artificial intelligence algorithm instead of a human. Companies are developing advanced AI models called neural networks that can analyze vast datasets of human writing to learn patterns and styles. The AI can then generate original writing by following the patterns it has learned while injecting some level of randomness and variation.

The most popular form of AI writing generation right now is through Large Language Models (LLMs). LLMs like GPT-3 contain billions of parameters after digesting internet data and can generate everything from essays to articles, poems, code, and more in seconds. The output writing can often pass as human-written since it draws directly from human writing data. However, the quality can vary greatly, and AI writing lacks deeper comprehension despite its ability to generate well-formatted text.

Why Use an AI Writing Detector?

Here are some of the main reasons individuals and organizations utilize AI writing detectors:

  • Academic integrity – Schools and universities use detectors to identify AI-written essays and catch students using generative writing tools to cheat. This maintains integrity and fairness.
  • Combat misinformation – Detectors help identify automated disinformation campaigns that use AI writing to generate false news, propaganda, etc. This reduces spread of misinformation.
  • Evaluate content quality – Media and content sites use detectors to flag low-quality AI-written articles to maintain high editorial standards.
  • Comply with content guidelines – Many sites have guidelines requiring human-written original content. The detectors help enforce compliance.
  • Understand the AI writing landscape – Researchers, journalists, and more use detectors to better understand capabilities and prevalence of current AI writing technologies.
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Maintaining author authenticity and high content quality continues to grow in importance as AI writing capabilities advance. That’s where these handy detection tools come in.

1. GPTZero

First on our list of top AI writing detectors is GPTZero. GPTZero is a free tool created by startup Anthropic to detect text generated by their own CLAUDE AI model, as well as other LLM models like GPT-3. GPTZero detects generated text with over 99% accuracy in many cases.

How it works – The detector uses a “zero-shot” approach, meaning it can generalize to new writing models without requiring specific training data from them. This future-proofs GPTZero against new models. It also explains why GPTZero works well for various generative AI models, not just CLAUDE.

Key features – Here are some of the key features that make GPTZero a top choice:

  • Applicable for texts between 128 and 2048 tokens
  • Supports English language detection with other languages in development
  • Offers both free and paid plans
  • Easy-to-use API for running bulk analysis
  • Actively maintained and updated as new generative AI models emerge

For those concerned with cheating or information quality, GPTZero makes it easy to spot writing that comes from an artificial brain instead of a real one.

2. JasperAI

JasperAI is another formidable AI writing detector that identifies text from models like GPT-3, Jurassic-1, Claude, and others with 96%+ accuracy.

How it works – JasperAI detects generated text using a combination of techniques:

  • Training detector models directly on texts from AI systems
  • Utilizing stylistic analysis to identify patterns typical of automated writing rather than humans
  • Leveraging statistical anomalies like low lexical diversity as clues of AI authorship

This multi-pronged approach allows JasperAI to match and even exceed GPTZero’s level of detection accuracy in head-to-head testing.

Key features – Here are some of the notable features of JasperAI:

  • Free tier allows limited use for individuals
  • Paid plans unlock additional analysis features
  • Offers both real-time web interface and API
  • Focused specifically on AI writing vs. plagiarism checkers
  • Actively maintained and explicitly covers new models like Claude
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For those needing to enforce rules prohibiting AI-generated content, JasperAI makes it possible to detect the latest AI models automatically.

3. Rytr AI

Rytr AI offers an “AI Content Detector” feature built right into its AI writing assistant to check content it generates before outputting it.

How it works – Instead of detecting third-party writing, Rytr AI focuses on evaluating its own content quality and flagging sub-par writing before ever showing it to the user. It analyzes aspects like topic relevancy, technical errors, plagiarism risk, readability level, and overall coherence.

This helps users avoid wasting time reviewing low-quality AI writing in the first place rather than detecting issues afterward. It’s a smart proactive approach compared to reactive detectors.

Key features:

  • Integrated directly into Rytr assistant
  • Analyzes text before returning to user
  • Checks qualities like relevance, plagiarism risk, etc.
  • Helps users avoid low-quality content
  • Unique approach for an AI generator itself

While it doesn’t actually detect third-party AI writing, Rytr demonstrates how generators could use internal detectors to filter quality proactively, setting a positive example of responsible AI use.

4. Quetext

Last on our list is Quetext, a plagiarism checker that also recently added AI-generated text detection capabilities.

How it works – Quetext added a “Not Human Flag” algorithm that looks for patterns highly indicative of AI writing vs. human authors.

Key features:

  • Built into established plagiarism checker
  • Specific AI writing detection flag
  • Free trial then paid subscription
  • Offers web interface and MS Word integration
  • Handles documents up to 20,000 words
  • Supports multiple file formats for upload

While best known as a plagiarism checker, Quetext’s addition of AI detection makes it a versatile tool for spotting both copied and computer-written content in one place.


With AI generators advancing rapidly, AI writing detection grows increasingly valuable to maintain trust and confidence in content authenticity. As this roundup of top tools demonstrated, detectors utilize various approaches from zero-shot learning to statistical analysis to identify the unique fingerprints of computer-generated text.

Models like GPTZero, JasperAI WellSaidLabs lead the way with over 95% accuracy rates, while free tools like Two Buttons Deep offer quick first pass analysis. We expect the accuracy race to continue as creators fine tune detectors against new advancements in generative writing. No matter your reason for wanting to discern human vs. artificial authorship – enforcing submission rules, filtering content, improving reader trust – these AI writing detectors provide the capabilities to detect even the most advanced models of today and tomorrow.

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Q: What are some key indicators a tool is using to detect AI writing?

A: Common signals include higher lexical diversity than humans can consistently produce, formulaic phrasing, grammar errors, weak topical consistency and logical inconsistencies machines don’t recognize, and more.

Q: Will these detectors work on non-English AI writing?

A: Most current detectors focus on English detection but some like GPTZero are expanding to other languages. Availability still lags for non-English.

Q: What’s the difference between plagiarism checkers and AI detectors?

A: Plagiarism detectors check for copied text from other human sources while AI detectors identify text generated entirely by machines to pass as human writing.

Q: Are paid detectors more accurate than free ones?

A: In most cases paid tools do outperform free ones modestly by using more robust algorithms, custom model training, and active development. But some free tools can still be moderately accurate.

Q: What does it mean if a detector labels something as AI generated?

A: It means the tool has calculated a high statistical probability that the writing was produced by an AI model like GPT-3 rather than authored by an actual human. But Occasional mislabeling can still occur on all detectors.