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QuillBot
quillbot.com โ€บ ai-content-detector
AI Detector & AI Checker - Detect ChatGPT, GPT-5 & Gemini Text
QuillBot's Free AI Detector - Use our AI checker to analyze text and identify content generated from ChatGPT, GPT-5, Gemini, Claude, and other AI platforms. ... Paste your text below to check if it was written by AI.
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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.
People also ask

What is the best AI Detector?

Copyleaks is an industry leader in accuracy, scalability, integration, and security. 

Several significant differences exist between our AI content detection tool and the rest of the market. For example:

  • We use large-scale, credible data with machine learning to understand text patterns, resulting in over 99% accuracy.
  • We offer seamless API and LMS integrations.
  • The detector can analyze and identify AI-generated code, even if altered.
  • Our AI checker doesnโ€™t flag non-AI features of Grammarly, like spell check and grammar, unlike other tools.
  • All Copyleaks products are fully GDPR-compliant and certified to SOC 2 and SOC 3 standards.
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copyleaks.com
copyleaks.com โ€บ home โ€บ 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
What is the most accurate AI detector?

According to Cornell University, the answer is Copyleaks AI Detector. In July 2023, a study published on arXiv by Cornell Tech researchers declared Copyleaks AI Detector the most accurate for detecting LLM-generated text.

Further independent studies have validated its accuracy and efficiency.

Read more about these third-party studies.

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copyleaks.com
copyleaks.com โ€บ home โ€บ ai detector
AI Detector - Free AI Checker for ChatGPT, GPT-5, Gemini & More
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Copyleaks
copyleaks.com โ€บ home โ€บ ai detector
AI Detector - Free AI Checker for ChatGPT, GPT-5, Gemini & More
The Copyleaks AI text detector helps you find AI-written content with over 99% accuracy, even when itโ€™s carefully blended with human writing. Our award-winning AI detector will help you better understand and utilize AI assistance on your blog ...
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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.
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Scribbr
scribbr.com โ€บ home โ€บ best ai detector | free & premium tools tested
Best AI Detector | Free & Premium Tools Compared
November 18, 2024 - QuillBotโ€™s free AI Detector received an overall score of 78%. This made it one of the most accurate free tools we tested (alongside Scribbrโ€™s free AI detector). It detected all GPT-3.5 and GPT-4 texts with 100% accuracy, and it had no false positives. Additionally, it performed above average when used to detect AI content that had been combined with human-written text or altered using a paraphrasing tool (it accurately detected 50% of these texts).
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Selzy
selzy.com โ€บ en โ€บ blog โ€บ best-ai-content-detectors
7 Best AI Content Detectors Tested and Reviewed | Selzy Blog
June 11, 2025 - Out of all the services on our best AI content detectors list, ZeroGPT has the most substantial free tier.
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Texas Tech University
guides.library.ttu.edu โ€บ artificialintelligencetools โ€บ detection
AI Detection - Artificial Intelligence Tools for Detection, Research and Writing - Guides at Texas Tech University
Perform an unlimited number of AI content checks for free, ensuring all of your work is authentic. ... Detect and humanize AI-generated texts with Surfer. Transform AI content into text that looks like it was written by a skilled and experienced human writer. ... Rated #1 Best AI Detector by Forbes.
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Decopy
decopy.ai โ€บ ai-detector
AI Detector - Trusted AI Checker (Free & No SignUp)
Decopyโ€™s free AI Detector is the best AI Checker tool that can be used to detect content generated by AI models such as ChatGPT, Gemini, Claude, LLaMa, etc. It has an accuracy rate of up to 99% and supports multiple languages.
Find elsewhere
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Medium
medium.com โ€บ freelancers-hub โ€บ i-tested-5-ai-detectors-heres-my-review-about-what-s-the-best-tool-for-2025-35a58eac86c5
I Tested 30+ AI Detectors. These 10 are Best to Identify Generated ...
3 weeks ago - Detecting-AI is a hub of tools required for content creation and analysis. It claims to identify AI-generated text by ChatGPT, Gemini, Jasper, Claude, and other similar models. Letโ€™s test its AI Detector and other tools. Hereโ€™s how to leverage this wonderful AI Detecting tool: ... Youโ€™ll see the AI Detector tool right at the top of the homepage. The best thing about this tool is that you can detect AI without signing in and for free.
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Grammarly
grammarly.com โ€บ ai-detector
AI Detector: Free AI Checker for ChatGPT, GPT5 & Gemini
Use Grammarly's free AI detector to identify content generated by ChatGPT, GPT5, and Gemini. Our AI checker provides reliable and free results, no sign-up needed.
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Humanize AI
humanizeai.pro โ€บ detector
Free AI Detector - Advanced AI Checker for ChatGPT, Gemini & More
Best free AI detector & checker for AI content. Check ChatGPT, Gemini, GPT-4, GPT-5 & other AI-generated content and instantly get an overall AI score.
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Scribbr
scribbr.com โ€บ home โ€บ free ai detector
Free AI Detector
May 20, 2025 - Does it detect content generated by ChatGPT, GPT4, or Gemini? Scribbrโ€™s AI Detector can confidently detect most English texts generated by popular tools like ChatGPT, Gemini, and Copilot. Our free AI Detector can detect texts written using GPT2, GPT3, and GPT3.5 with average accuracy, while our Premium AI Detector has high accuracy and the ability to detect GPT4.
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Undetectable AI
undetectable.ai
AI Detector & AI Checker for ChatGPT (Free) - Undetectable AI
A standout feature of Undetectable AI is their free AI detector, which uses a multiple detector scoring system so you can see how other AI detectors might judge it. ... Undetectable AI is at the forefront of making AI-generated content more ...
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NoteGPT
notegpt.io โ€บ ai-detector
AI Detector & Checker - Trusted, Free for ChatGPT, Claude, Gemini
Finding it hard to identify AI-generated text, images, or content? Our free online AI Detector is the perfect solution. No login required! Easily check AI-generated materials with accuracy, whether it's text, images, or other content.
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Sapling
sapling.ai โ€บ ai-content-detector
AI Content Detector | GPT-5, Claude 4.5, Gemini 2.5 Detection
Free AI content detector with 97% accuracy. Detects GPT-5, Claude 4.5, Gemini 2.5, Qwen3, DeepSeek-V3 and other AI models. Analyze text, PDFs, and Word documents.
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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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Surfer
surferseo.com โ€บ ai-content-detector
Free AI Detector | Surfer
Detect AI generated texts with Surfer. Identify text generated with AI writing tools and pick out content that was not written by a real person. Surfer is recognized as one of the best AI detector, known for its accuracy and ease of use.
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Gowinston
gowinston.ai โ€บ home
The Most Trusted AI Detector | ChatGPT Detection Tool
December 27, 2022 - AI detectors have been developed to determine if online content is human or machine-generated, though their effectiveness currently varies. Winston AI has by far the best percentage rate (99,98%) of detecting AI generated content from ChatGPT, ...
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SEO.AI
seo.ai โ€บ blog โ€บ free-ai-content-detectors
Top 10 Free AI Content Detectors: Accurate Analysis in Seconds
However, the free version only lasts seven days and is limited to 2,000 credits which equals 2,000 words. https://copyleaks.com/ai-content-detector Probability: "AI content detected". The probability is calculated for each paragraph. Our AI text received a probability of between 24.6% and 39.9% of human writing.