GPTZero

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Introduction: GPTZero is an AI detection platform built to identify text generated by large language models, including ChatGPT, GPT-4, Gemini, Claude, and LLaMA. Key features include sentence-level highlighting, AI vocabulary analysis, plagiarism detection, and authorship verification. The tool assists educators, writers, and professionals in maintaining academic integrity and verifying the authenticity of written content.
Monthly Visitors: 19.1M

GPTZero Product Information

What is GPTZero?

GPTZero is an AI detection tool designed to identify text generated by large language models such as ChatGPT, GPT-4, Gemini, Claude, and LLaMA. It offers features like sentence-level highlighting, AI vocabulary detection, plagiarism checking, and authorship verification. GPTZero aims to help educators, writers, and other professionals maintain academic integrity, ensure authenticity, and detect potential AI-generated content in various contexts.

How to use GPTZero?

To use GPTZero, paste your text into the provided text box or upload a file. The tool will analyze the content and provide an overall detection result, highlighting specific sentences where AI usage is detected. For more extensive use, you can sign up for a free account or install the Chrome extension.

GPTZero's Core Features

  • AI Detection
  • Advanced AI Scan
  • AI Vocabulary Detection
  • Plagiarism Checker
  • Authorship Verification
  • Source Finder
  • Grammar Check
  • AI Grader

GPTZero Use Cases

#1 Detecting AI-generated content in student assignments
#2 Verifying the authenticity of writing
#3 Identifying plagiarism
#4 Ensuring originality in content creation
#5 Defending against AI phishing and cyberattacks
#6 Training machine learning models with human data

FAQ from GPTZero

What is GPTZero? +

GPTZero is an AI detector used to determine if a document was written by a large language model like ChatGPT. It provides AI detection at the sentence, paragraph, and document levels.

How do I use GPTZero? +

Paste the text you want to check or upload a file, and the tool will provide an overall detection score along with sentence-by-sentence highlighting where AI content is detected.

Does GPTZero only detect ChatGPT outputs? +

No, GPTZero is designed to work across various AI language models, including ChatGPT, GPT-4, GPT-3, GPT-2, LLaMA, and other services based on those models.

What are the limitations of AI Detection? +

Because AI-generated content is constantly evolving, these results should not be used as the sole basis for punishing students. We recommend that educators use our Writing Reports as part of a holistic assessment of student work.

GPTZero Pricing

Free

$0

Free plan available.

Related Model Comparison Pages

Use these comparison pages to understand the trade-offs between the models most relevant to GPTZero.

Compare GPT 5.4 and GPT 5.4 Pro across pricing, context window, capabilities, benchmarks, and API access to choose the better fit for long-context workloads versus long-context workloads.

Compare GPT 5.5 and GPT 5.4 across pricing, context window, capabilities, benchmarks, and API access to choose the better fit for long-context workloads versus long-context workloads.

Compare GPT 5.5 and Claude 4.6 Opus across pricing, context window, capabilities, benchmarks, and API access to choose the better fit for long-context workloads versus long-context workloads.

Compare GPT 5.5 and Claude 4.6 Sonnet across pricing, context window, capabilities, benchmarks, and API access to choose the better fit for long-context workloads versus long-context workloads.

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