There are no accurate AI detectors, free or paid. Why do you want one? Answer from ptangyangkippabang on reddit.com
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GPTZero
gptzero.me
AI Detector - Free AI Checker for ChatGPT, GPT-5 & Gemini
Best free AI detector - simply paste your text to instantly get an overall AI score and advanced sentence by sentence detection.
Pricing
A powerful API Integration seamlessly integrates our AI detector into any platform.
For studentsTools to improve your writing and avoid false accusations
When our founder and CEO, Edward ... Princeton, he developed an algorithm to detect AI-created disinformation. Our mission begins with demystifying AI in the classroom. We can’t wait to see the future you’ll build with these tools....
For teachersFoster academic integrity in the classroom
GPTZero has all the tools teachers need to promote responsible AI adoption in their classroom. In November of 2022, ChatGPT’s release opened the Pandora's box on massively available AI-generated content. At GPTZero, we immediately knew the new challenge that AI could pose to information transparency and academic integrity. Within three months, we built the first AI detector ...
Plagiarism CheckerDetect content from outside sources
In our tests and third party studies, our AI detector’s accuracy is over 99% in identifying pure AI-generated content. Yes. GPTZero offers a free plan that covers up to 10,000 words per month. If you need more, you can upgrade to a paid subscription for higher limits. It’s very simple: either paste the text into the tool ...
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ZeroGPT
zerogpt.com
AI Detector - Trusted AI Checker for ChatGPT, GPT5 & Gemini
AI Content Detector and ChatGPT Detector, simple way with High Accuracy. AI Checker & AI Detector Free for AI GPT Plagiarism by ZeroGPT.
Discussions

Which is the best AI detection tool or website?
There are no accurate AI detectors, free or paid. Why do you want one? More on reddit.com
🌐 r/SEO
117
21
January 18, 2025
Can someone here PLEASE tell me what is the best FREE AI Detector that actually works/ if there isn't one: are your colleges helping fund it?
There will never be a reliable one. More on reddit.com
🌐 r/Professors
182
53
March 30, 2025
AI Detector
Here are the 11 best and most popular (not sure best) AI checkers I want to test: (How did I check popularity? I simply used SEO tools to estimate their traffic and sorted them by that. If any AI detectors are missing here, it’s because they don’t work, users don’t like them, or they’re not investing in marketing, haha, so… sorry!) If you want to avoid high detection and humanize ai content - read my tutorial How to Humanize AI & Best AI humanizers Best AI Humanizers with proofs reviewed here: https://www.reddit.com/r/DataRecoveryHelp/comments/1oqwdib/best_ai_humanizer 🎁 If you need to Humanize AI right away try this: https://aihumanizer.net - 100% Free Ai humanizer (nice human score in ZeroGPT & GPTZero, simple language) https://www.zerogpt.com/ - ZeroGPT Checker (My top choice. Easy to fool when you rewrite content in a conversational style.) https://gptzero.me/ - GPTZero AI Detector (Very inconsistent results. Since the September update it has become unstable - some texts score 0%, others 100% AI, with no clear logic.) https://quillbot.com/ai-content-detector - Quillbot AI Checker (Works fairly well. Can be fooled by using natural language and avoiding a rigid, formal tone.) https://www.scribbr.com/ai-detector/ - Scribbr AI Detector (Just an iframe of Quillbot’s checker.) https://www.grammarly.com/ai-detector - Grammarly AI Checker (Very weak detector, easy to trick.) Less popular AI detectors: https://originality.ai/ai-checker Originality AI Checker (Feels scammy. Almost always shows 100% AI, but if you add intentional errors it marks them as human. Very odd.) https://undetectable.ai/ Undetectable AI Detector https://decopy.ai/ai-detector/ Decopy AI Detector https://notegpt.io/ai-detector NoteGPT AI Detector https://copyleaks.com/ai-content-detector Copyleaks AI Detector https://gowinston.ai/ Winston AI Detector I would not review each pros and cons and plans intentionally. Who cares? You can look yourself. I will only get scores before and after and share with you. Reddit allows you to attach only one image per post, so, sorry! What AI detector do colleges & students use? It’s definitely Turnitin AI Checker. There’s no free way to check it without registration. I tried, and it asked whether I’m a student, instructor, or teaching assistant. I didn’t want to lie, so I quit. But I’ve read a lot of Reddit discussions, and both students and teachers give the same answer to the question: “How accurate is Turnitin AI Detector?” The simple answer: Not accurate. Haha! Lots of false positives and easy to manipulate with special prompts. Ok let’s do a simple test of the rest popular best AI detectors and checkers: For this test, I’ll generate a simple essay titled “What is an AI Detector and How Do They Work?” (500 words). Then I’ll show you the score before and after some basic humanization using simple prompts.I’m intentionally skipping web-based AI humanizer tools because I already covered those in this tutorial.I’ll use ChatGPT 4.1 Mini – fast and cheap. I assume a lot of writers and students might be using this specific model. More on reddit.com
🌐 r/DataRecoveryHelp
75
182
June 16, 2025
What is a trustworthy AI-detection tool?
There is none, they are all scams. It is not possible to detect AI generated text. Please do some research. Also, please do not use AI to get your college degree.... https://www.google.com/search?q=ai+detectors+are+scams More on reddit.com
🌐 r/ArtificialInteligence
57
0
May 5, 2024
People also ask

How do I use GPTZero's AI detection tool?
You can start using GPTZero straight away in 3 easy steps: Paste Text or Upload Document: Paste in raw text or upload your file for review and press 'Scan'. For scans over 10,000 characters, create a free account first. See Your Results: GPTZero will suggest what percentage of your text is likely to be AI-generated and highlight the specific phrases it has detected. Download our Chrome Extension for Google Docs and web: View AI detection and typing pattern metrics on any page, allowing you to spot AI-created content with ease.
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gptzero.me
gptzero.me
AI Detector - Free AI Checker for ChatGPT, GPT-5 & Gemini
What models can the AI Detector detect?

Copyleaks can detect content from:

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

…and more.

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copyleaks.com
copyleaks.com › home › ai detector
AI Detector - Free AI Checker for ChatGPT, GPT-5, Gemini & More
What is the best AI detector?
GPTZero is consistently rated the most accurate and reliable AI detector across various use cases. Reliability: In 2025, G2 ranked GPTZero the #1 most trusted and reliable AI tool, above Grammarly. Accuracy: GPTZero is the most accurate AI detector with 99% accuracy rates across diverse datasets, independently reviewed by AI labs at top institutions. Independent reviewers, including Tom's Guide, testing all popular detectors named GPTZero the most accurate. Best Interpretability: GPTZero is the only detector that explains exactly why text is AI with natural language. GPTZero also has the most
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gptzero.me
gptzero.me
AI Detector - Free AI Checker for ChatGPT, GPT-5 & Gemini
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QuillBot
quillbot.com › ai-content-detector
AI Detector & AI Checker - Detect ChatGPT, GPT-5 & Gemini Text
It can detect content from major models, including ChatGPT, Gemini, Claude, and Llama, and accurately distinguish between fully AI-generated text and content that has been refined using assistive writing tools. AI detectors are widely used by educators, businesses, publishers, and content creators ...
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Grammarly
grammarly.com › ai-detector
AI Detector: Free AI Checker for ChatGPT, GPT5 & Gemini
Mac and the Grammarly Editor. It will soon become available for more of our product offerings, enabling you to check your text across even more applications and websites. The AI detector tool on this page is compatible with any browser.
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Scribbr
scribbr.com › home › free ai detector
AI Detector - Trusted AI Checker for ChatGPT, Copilot & Gemini
May 20, 2025 - Our AI Detector is carefully trained to detect most texts generated by popular tools like ChatGPT and Bard. These texts often contain certain phrases, patterns, or awkward wording that indicate they were not created by a human.
Find elsewhere
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Originality AI
originality.ai
AI Detector - Most Accurate AI Content Checker for ChatGPT - Originality.ai
Our AI-Generated Text Detector has repeatedly been shown to be the most accurate at detecting AI-generated content by both our internal testing and 3rd party peer-reviewed research papers.
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Copyleaks
copyleaks.com › home › ai detector
AI Detector - Free AI Checker for ChatGPT, GPT-5, Gemini & More
We’re not here to help you bypass AI detection—we’re here to help you understand it. Whether you’re a student checking if your paper might raise red flags or a writer making sure your content doesn’t read like low-effort AI, Copyleaks gives you the tools to work with AI responsibly, ...
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MyDetector
mydetector.ai
Free AI Detector - Accurate AI checker for chatGPT & More
MyDetector AI checker free tool uses machine learning models trained on human and AI text data. It analyzes content to spot AI-generated patterns like repetition, lack of creativity, or unnatural transitions.
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NoteGPT
notegpt.io › ai-detector
AI Detector & Checker - Trusted, Free for ChatGPT, Claude, Gemini
Yes, our AI Detector allows you to check both text and images for signs of AI generation. Whether it's written content or images, the tool can detect AI patterns and provide an accurate result in seconds.
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Pangram Labs
pangram.com
Pangram Labs AI Detection
Pangram detects AI writing from ChatGPT, GPT-4o, GPT-4.5, Claude Sonnet by Anthropic, Google Gemini, Deepseek, Meta AI, Grok, Llama, Mistral, OpenAI's o1, o3, Perplexity and Deep Research.
Published   November 15, 2025
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Uchicago
academictech.uchicago.edu › detection-software
AI and Plagiarism Detection Software: A Comparative Guide | Academic Technology Solutions
It detected all AI-generated text save that from Copilot with 100% accuracy and detected human-written text with 99% accuracy. However, it was only 63% confident when analyzing Copilot-generated text. The tool operates on a freemium model with tiered pricing plans; the free plan includes 10,000 words per month.
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Texas Tech University
guides.library.ttu.edu › artificialintelligencetools › detection
AI Detection - Artificial Intelligence Tools for Detection, Research and Writing - Guides at Texas Tech University
1 week ago - Additionally, the tool provides detailed reports that include the percentage of AI-generated content in each sentence and a summary of the text’s overall AI-generated content. ... AI Detector Pro's neural network is designed to detect patterns used by GPT based AI text generation models (which ...
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Gowinston
gowinston.ai › home
The Most Trusted AI Detector | ChatGPT Detection Tool
December 27, 2022 - Winston AI is the industry leading AI content detector and plagiarism checker for ChatGPT, Claude, Google Gemini and more.
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The Conversation
theconversation.com › how-do-ai-detection-tools-actually-work-and-are-they-effective-269390
How do ‘AI detection’ tools actually work? And are they effective?
3 weeks ago - For example, the Content Credentials inspect tool allows people to view how a user has edited a piece of content, provided it was created and edited with compatible software. Like text, images can also be compared against verified datasets of AI-generated content (such as deepfakes). Finally, some AI developers have started adding watermarks to the outputs of their AI systems. These are hidden patterns in any kind of content which are imperceptible to humans but can be detected by the AI developer.
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WRITER
writer.com › ai content detector
AI content detector | ChatGPT detector & AI checker for GPT-4 - WRITER
October 14, 2025 - Check what percentage of your content is seen as human-generated with this free AI content detector tool. Paste in text or a URL to find out.
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Schools That Lead
schoolsthatlead.org › blog › best-ai-detectors-for-teachers
10 Best AI Detectors for Reviewing Student Work — Schools That Lead
July 1, 2025 - Balancing Detection with Ethical Considerations: Responsible use of AI detectors is crucial, as over-reliance can hinder learning. Ethical application includes transparency in detection policies, addressing false positives, and emphasizing learning over policing. With a growing need for tools to maintain academic integrity, teachers now have access to a range of AI detectors specifically designed to identify AI-generated content in student assignments.
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Medium
medium.com › freelancers-hub › i-tested-5-ai-detectors-heres-my-review-about-what-s-the-best-tool-for-2025-35a58eac86c5
I Tested 5 AI Detectors – Which AI Detection Tool ...
2 weeks ago - Looking for the best AI detectors in 2025? I tested 5 top AI detection tools, including GPTZero and Originality.ai, to find the most accurate AI content verification tool.
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University of San Diego Legal Research Center
lawlibguides.sandiego.edu › c.php
The Problems with AI Detectors: False Positives and False Negatives - Generative AI Detection Tools - Guides at University of San Diego Legal Research Center
3 weeks ago - False negatives occur most often due to an AI tool’s sensitivity settings or to users intentionally using evasive techniques to make their text more human-like. First, AI detection companies need to balance the false positive and false negative rates in light of the serious academic ramifications that result from false positives.
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SurgeGraph
surgegraph.io › ai-detector
Free AI Detector: Catch AI Writing Instantly
Our AI detection tool uses advanced NLP, deep learning, neural networks, and large language models (LLMs) to evaluate subtle language traits like sentence flow, grammar, tone, and phrasing for spot-on accuracy.