Recent advances in the field of generative AI made it difficult to recognize whether a passage of text was written by a human or a high-end bot. In particular, Generative Pre-trained Transformer or GPT models have displayed an uncanny ability to understand natural language and provide reasonable answers to a wide variety of prompts. The latest iterations of this technology, such as ChatGPT, GPT3.5, and GPT 4 are so impressive that many businesses are thinking about switching to it for a large portion of their content creation needs.

On the flip side, the availability of this technology poses a practical problem – how to identify AI-generated text in situations where it’s not allowed, such as job applications or university term papers? Since GPT doesn’t replicate existing content, standard plagiarism tools are of little use. To remedy this problem, a range of new GPT output detectors emerged within a short frame and provided a way to check the originality of each piece of text. We present the best Chatgpt output detector applications from this class.

Also Read: How to Create Custom GPTs with Openai’s GPT Builder in 2023? >

What is a GPT Output Detector?

Software applications capable of recognizing the latent patterns typical for AI-generated text are sometimes described as GPT output detectors. Apps of this kind utilize a variety of analytic methods to identify content that was not created by humans. Output detectors are in high demand at the moment, as they allow educational institutions and business organizations to prevent cheating and fraud.

It’s important to note that different GPT output detectors were created to counter specific versions of the generative model, so their features may not be up to date. Older tools could perform well when analyzing content created by GPT-2, but struggle with more advanced version. Recently released GPT 4 model is especially powerful and its output is so similar to natural language that even the most robust detectors might have trouble dealing with it.

List of 15 Best GPT Output Detectors

GPT-2 Output Detector

Best for: Detecting text generated by the older versions of the GPT language model (i.e. GPT2)

Pros:

• Developed by OpenAI, the same company that originally constructed and trained GPT
• It was based on the RoBERTa neural model with 1.5 billion parameters
• Features a simple textbox interface that requires no technical knowledge
• Returns the estimated likelihood that the analyzed text was automatically generated

Cons:

• Created for detecting content from an older and less powerful form of the GPT model
• Doesn’t recognize all instances of computer-generated text

Pricing: free

GPTZero

Best for: Prevention of academic fraud through submission of essays generated by ChatGPT and similar large language models

Pros:

• Specialized tool for detection of GPT output within longer chunks of text (i.e. essays)
• The app calculates a unique score based on the presence of AI-created text
• AI-generated portions within the text are clearly highlighted
• This detector was developed specifically with educational use in mind

Cons:

• Requires longer text for the most optimal performance
• It only works with English language text

Pricing: free

Writer’s AI Content Detector

Best for: Improving SEO positioning of articles and blogs by flagging any instances of computer-generated text

Pros:

• Detects sentences that appear as if they were created automatically with GPT-based models
• Users can enter the text into a field or simply paste an URL that leads to its online location
• Fully integrated into an AI-powered writing assistant tool
• Text can be edited from the same interface used for detection

Cons:

• Maximum length of analyzed text is limited to 1500 characters
• Can’t be used outside the Writer platform unless an API is imported

Pricing: $18 per user monthly (as part of Writer’s Team plan)

Contentatscale AI Content Detector

Best for: Recognizing the output of advanced large language models including ChatGPT

Pros:

• Advanced AI-driven software that identifies robotic-sounding language
• Only a small amount of text (minimum 25 words) is sufficient for the detection
• Uses a combination of different algorithms and search data to find AI output
• Simple web interface that can be accessed from any device

Cons:

• This is a generalized tool, without specialization for any type of text
• Manually edited GPT output can potentially bypass detection

Pricing: free

Hello-SimpleAI ChatGPT Detector

Best for: Discovering any parts of the text generated by ChatGPT in English or Chinese language

Pros:

• Open source project that offers three specialized versions of a chatbot output detector
• This tool can recognize whether questions and answers were created by a machine
• The models, source code and datasets are readily available to other researchers
• This detector can successfully process bilingual documents

Cons:

• The detector can be unreliable when analyzing very short passages of text
• The models were trained in only two languages

Pricing: free (open source)

Copyleaks

Best for: Polishing the grammatical correctness and style quality of text while eliminating any instances of plagiarism or content written by bots

Pros:

• Powerful GPT output detector optimized for recognizing text written by the latest models
• Successfully detects bot-generated bits in documents containing mixed sources
• The AI detector can be added to the Chrome browser as an extension
• Trained for recognizing AI-generated content in many different languages

Cons:

• The speed of returning the answer is dependent on document length
• There is some risk of showing false positive results

Pricing: Free to all existing Copyleaks users, API Integration is priced per volume of scanned content

Originality

Best for: Highly accurate detection of GPT model output and plagiarized content in texts of any length

Pros:

• Versatile authenticity tool that can recognize whether AI writing assistants were used to craft an e-mail message or online article
• Accuracy of AI output detection of over 90% can be reached with text of just 50 words
• This detector performs well even when facing the most advanced versions of the GPT model
• It can be installed as a browser extension and activated with a single click

Cons:

• Substandard customer support service
• Costs can escalate quickly for organizations working with large content volume

Pricing: $0.01 per 100 words scanned

AI Detector Pro

Best for: Catching even the smallest parts of AI-generated text inserted into a document

Pros:

• Very reliable GPT output detector that offers an accuracy guarantee
• Originality score is calculated for every part of the scanned text
• The product is constantly updated to reflect the latest advances of the GPT model
• This app also contains excellent reporting and project management tools

Cons:

• Users have to register and log in before they can access this AI detector tool
• Free version offers very limited functionalities

Pricing: Free plan is available, Basic plan costs $13.99 per month, Unlimited plan costs $25.99/month

Draft&Goal ChatGPT – GPT3 Detector

Best for: Quick checks whether a text found online includes parts generated by GPT-powered tools

Pros:

• Simple web-based AI detector capable of accurately recognizing the output of GPT3
• Identifies invisible digital fingerprints typical for AI-generated text
• One of the rare tools that can process French language text
• It can produce accurate results with texts as short as 400 characters

Cons:

• This tool is still in the beta testing stage
• There are only two languages currently supported

Pricing: free

Hugging Face

Best for: Developing, training, and testing new AI content detection tools based on existing models

Pros:

• Large online library of Machine Learning models, datasets, and resources
• Collaborative platform that enables easy access to resources created by other researchers
• Availability of tools for a variety of advanced NLP and computer vision tasks
• The ability to test powerful language models in the cloud

Cons:

• Aimed at researchers rather than business users
• Requires a strong technical understanding of Machine Learning concepts

Pricing: free (open source)

OpenAI’s AI Text Classifier

Best for: Sentiment analysis, topic classification, and spam detection.

Pros:

• Developed by OpenAI
• Free to use
• Processing large amounts of text data quickly

Cons:

• No precise score
• it does not provide a feature to highlight individual sections of text based on their likelihood of being generated by AI or not.

Crossplag AI Content Detector

Best for: Can be used to analyze a wide range of written content, including academic papers, articles, and blog posts.

Pros:

• Detecting not only exact matches but also paraphrased and reworded content
• A user-friendly interface
• Provides detailed reports that highlight potential cases of plagiarism and provide suggestions for improving the original content

Cons:

• The tool lacks the feature to detect plagiarism or annotate specific sections of the content.

Sapling AI Detector

Best for: This tool outputs the probability that a piece of content was AI-generated by a model such as GPT-3.5 or ChatGPT.

Pros:

• Offers free and paid versions
• Has a Chrome Extension
• Offer overall score and sentence highlighting

Cons:

• The detection structure is a bit confusing

ZeroGPT

Best for: ZeroGPT is designed to be a more accessible and affordable alternative to commercial language models like GPT-3.

Pros:

• It is based on the GPT architecture, similar to OpenAI’s GPT models
• The open-source project, which means that the code is freely available for anyone to use, modify, and distribute
• Totally free to use

Cons:

• No plagiarism detection

Writefull GPT Detector

Best for: The GPT Detector assesses if a text has been generated by GPT-3, GPT-4 or ChatGPT.

Pros:

• It is a free tool with a simple score and API access

Cons:

Frequently Asked Questions about GPT output detectors

Q1. Are there any trustworthy GPT output detectors that have a high success rate against the latest models?

At present time, no AI detector software can accurately recognize 100% of bot-generated text, but several tools come pretty close. In particular, paid tools such as Originality or Copyleaks are expected to fare pretty well even when dealing with the most sophisticated incarnations of the GPT model.

Q2. Can I use a GPT output detector in any language other than English?

Most of the early GPT output detectors were trained with English language datasets, but a few of them are already supporting additional languages. This aspect of AI detection software will certainly be improved in the near future to match the multilingual capacity of GPT-based bots

Q3. Is it possible to edit AI-generated text so that it can avoid detection by software tools?

Text that was produced using a combination of AI writing tools and human labor is even more difficult to accurately detect, either by GPT output detectors or standard search engines. With clever editing, AI-generated text could be used for a variety of legitimate purposes without risk of being flagged as spam.

Final Thoughts

The arms race between generative AI applications and software tools designed to detect their output is just getting started, and it’s important not to fall behind. By learning the state of the market in this niche, business users who depend on content creation for revenies can understand how best to use GPT-powered software to their benefit. The abundance of newly created tools of this kind is certainly encouraging, but it still remains to be seen which products will separate from the pack and become widely accepted as the golden standard for AI content detection.