Início rápido
This guide covers every GPTZero feature:
- Começando — Create an account and run your first scan
- Como usar o detector de IA — Check any document and see whether it was written by AI
- Como usar o vocabulário de IA — Find the certain words that AI chatbot drafts repeat over and over
- How to Use Accurate Plagiarism Checker — Match your text against existing online sources in one scan
- How to Use Free Grammar Checker — Clean up grammar and sentence structure before you submit
- Como usar o detector de alucinações — Catch fake sources and invented facts before anyone else does
- Como usar o AI Grader — Grade an essay against your own rubric in seconds
- Como usar a verificação de autoria — Prove your work was written by a human using your edit history
- Como usar a digitalização avançada por IA — See a plain English reason behind every flagged sentence
- Como usar as integrações do Canvas — Scan submitted assignments inside your existing classroom setup
Tempo necessário: 5 minutos por filme
Neste guia também: Dicas profissionais | Erros comuns | Solução de problemas | Preços | Alternativas
Por que confiar neste guia?
I have used GPTZero for two years across estudante essays and client drafts.
Every screen below comes from my own account, not a press kit.
GPTZero is the AI detector most professores and editors reach for first.
Ele escaneia o seu texto and tells you what looks written by AI.
Most people stop at that one score.
This guide shows you every tool behind it, step by step.
Tutorial GPTZero
This How to Use GPTZero tutorial walks through each feature in order, from your first scan to advanced grading.
GPTZero
Know in seconds whether a document was written by a human or an AI chatbot. GPTZero reads millions of documents worth of patterns and explains every flag it raises. Start free, no card needed.
Primeiros passos com o GPTZero
Do this one time before you touch any feature.
Leva cerca de três minutos.
Passo 1: Crie sua conta
Go to the GPTZero landing page and click sign up.
Insira seu e-mail e crie uma senha.
✓ Ponto de verificação: Verifique o seu caixa de entrada para o e-mail de confirmação.
Passo 2: Abra o Painel de Controle
GPTZero runs in your browser, so there is nothing to install.
Log in and the dashboard opens with every tool in one menu.
Short videos in the help center cover each tool if you get stuck.
Here is what the main screen gives you:
✓ Ponto de verificação: You should see the scan box and the tool list.
Step 3: Add the Origin Extension
Install the GPTZero Origin extension for Chrome.
It adds live results in Google Docs and lets you scan any webpage.
✅ Concluído: Your account is ready for every feature below.
Como usar o detector de IA GPTZero
Detector de IA lets you scan a document and see how much of it reads as AI generated text.
Veja aqui como usá-lo passo a passo.
Passo 1: Cole seu texto
Open the GPTZero dashboard and create an account if you have not yet.
Paste your text into the scan box, or upload a PDF, DOCX or TXT file.
Etapa 2: Execute a verificação
Click the scan button and wait a few seconds.
Eis como isso se parece:
✓ Ponto de verificação: You should see a probability score plus sentence level highlighting.
Step 3: Read the Score
Probability scores show the likelihood of AI generation across the whole document.
Clean lines read as human writing, and flagged lines look written by AI.
✅ Resultado: You know exactly how much of the file reads as AI content.
💡 Dica profissional: Give it at least 200 to 250 words. Shorter snippets often lead to a false positive.
Como usar o vocabulário de IA do GPTZero
Vocabulário de IA lets you spot the certain words that an AI chatbot leans on far too often.
Veja aqui como usá-lo passo a passo.
Step 1: Open the AI Vocabulary Tool
Pick AI Vocabulary from the tool menu in your dashboard.
Step 2: Paste Your Draft
Drop in an ensaio, a blog post or any text you want checked.
Eis como isso se parece:
✓ Ponto de verificação: Overused AI terms appear highlighted line by line.
Step 3: Rewrite the Flagged Words
Swap the flagged terms for your own voz and normal word choice.
Your writing stops sounding predictable straight away.
✅ Resultado: Your draft reads less like AI writing and more like you.
💡 Dica profissional: Do not delete every flagged word. Some certain words belong in your natural style.
How to Use GPTZero Accurate Plagiarism Checker
Accurate Plagiarism Checker lets you see whether your text matches pages that already exist online.
Veja aqui como usá-lo passo a passo.
Passo 1: Abra o Verificador de Plágio
Select the plagiarism checker from the same dashboard menu.
Step 2: Add Your Document
Paste the text or upload the file you want compared.
Eis como isso se parece:
✓ Ponto de verificação: Matched passages appear with a link to the original page.
Step 3: Review Each Match
Open every flagged source and confirm the quote or citation is correct.
✅ Resultado: You can prove the work is original before you submit it.
💡 Dica profissional: Run detecting AI and plagiarism scans together. Copied text and AI text are different problems.
How to Use GPTZero Free Grammar Checker
Free Grammar Checker lets you fix grammar and sentence structure without leaving the editor.
Veja aqui como usá-lo passo a passo.
Passo 1: Abra o Corretor Gramatical
Choose the free grammar checker from your tool list.
Step 2: Paste the Text
Add the draft you want cleaned up.
Eis como isso se parece:
✓ Ponto de verificação: Errors appear inline with a suggested fix beside each one.
Passo 3: Aplique as sugestões
Accept the fixes that help and skip the ones that flatten your voice.
✅ Resultado: Your document is clean, readable and ready for a human reader.
💡 Dica profissional: Fix grammar last. Heavy editing after a scan can change your detection results.
Como usar o detector de alucinações GPTZero
Detector de Alucinações lets you catch invented facts and fake sources that an AI chatbot made up.
Veja aqui como usá-lo passo a passo.
Step 1: Open the Hallucination Detector
Select the hallucination detector from the dashboard.
Step 2: Add Text With Citations
Paste any research summary, essay or report that cites sources.
Eis como isso se parece:
✓ Ponto de verificação: Suspect claims and broken references are marked in the results panel.
Step 3: Verify Every Flag
Open each flagged citation and confirm the source is real.
✅ Resultado: Your citation checks are done and no invented source survives.
💡 Dica profissional: Treat every AI written reference as suspect. Verify the page before you keep it.
Como usar o GPTZero AI Grader
Avaliador de IA lets you grade an essay against your own rubric without reading it twice.
Veja aqui como usá-lo passo a passo.
Step 1: Open the AI Grader
Pick the AI Grader and start a new grading job.
Step 2: Upload the Rubric
Upload rubric files and add a prompt describing what you want scored.
Eis como isso se parece:
✓ Ponto de verificação: A grade appears beside each rubric line with a short reason.
Step 3: Read the Feedback
You get a score plus written feedback you can edit before sending.
✅ Resultado: A stack of assignments is graded with consistent, explainable feedback.
💡 Dica profissional: Write the prompt like instructions for a teaching assistente. Vague prompts give vague grades.
How to Use GPTZero Authorship Verification Tool
Verificação de autoria lets you prove a document was written by a human using its edit history.
Veja aqui como usá-lo passo a passo.
Step 1: Connect Google Docs
Install the GPTZero Origin extension and open your file in Google Docs.
Live results and flags appear as Google Docs comments beside your draft.
Step 2: Write as Normal
The extension records your writing process quietly in the background.
That typing pattern analysis becomes your evidence later.
Eis como isso se parece:
✓ Ponto de verificação: The GPTZero writing report opens as a video replay of your typing.
Step 3: Export the Writing Report
Share the human writing report as proof of how the draft grew.
✅ Resultado: You have hard evidence that the essay was written by a human.
💡 Dica profissional: Turn this on before you start. A finished file has no edit history to show.
How to Use GPTZero Advanced AI Scanner
Varredura avançada de IA lets you see a plain English reason behind every single flagged sentence.
Veja aqui como usá-lo passo a passo.
Step 1: Start an Advanced Scan
Toggle the advanced scan option before you run your check.
Step 2: Open a Flagged Sentence
Click any highlighted sentence to read why it was detected.
You see just what triggered the flag, not only a number.
Eis como isso se parece:
✓ Ponto de verificação: Each flag opens a short explanation written in normal language.
Step 3: Compare the Explanations
Look for repeated reasons across the document, not one odd line.
✅ Resultado: You understand the reasoning instead of trusting a single number.
💡 Dica profissional: This scan also handles paraphrased AI text, which basic AI content detectors usually miss.
Como usar as integrações do GPTZero Canvas
Integrações do Canvas lets you scan submitted assignments without leaving your classroom software.
Veja aqui como usá-lo passo a passo.
Step 1: Connect Canvas
Link your Canvas account from the integrations page in GPTZero.
Step 2: Pick a Course
Choose the course and the assignments you want covered.
Eis como isso se parece:
✓ Ponto de verificação: Your course lista loads with a scan status beside each student.
Step 3: Review Submissions
Every submission gets scanned as it arrives, with results in one list.
✅ Resultado: Detection runs quietly in the background for the whole classroom.
💡 Dica profissional: Tell students the scan exists on day one. Surprise detection damages trust fast.
Dicas e Atalhos Profissionais do GPTZero
After two years of daily use, these are the habits that saved me the most time.
Atalhos de teclado
| Ação | Atalho |
|---|---|
| Select the whole document | Ctrl + A / Cmd + A |
| Paste text into the scan box | Ctrl + V / Cmd + V |
| Paste without formatting | Ctrl + Shift + V |
| Find certain words in results | Ctrl + F / Cmd + F |
Características ocultas que a maioria das pessoas não percebe
- Envio de arquivos em lote: Drop a folder of assignments in at once instead of scanning one document at a time.
- Webpage scanning: The Origin extension will scan any page you are reading for AI generated content.
- Acesso à API: Register on the Developer Portal, grab an API key and push large scan jobs through automatically.
GPTZero: Erros comuns a evitar
Mistake #1: Trusting One Score
❌ Errado: Treating a single number as proof that text was written by AI.
✅ Direita: Double check with a second scan and read the sentence level reasons first.
Mistake #2: Scanning Tiny Snippets
❌ Errado: Pasting two sentences and expecting a reliable answer.
✅ Direita: Give the detector 200 to 250 words so its statistical analysis has enough data.
Mistake #3: Punishing Students on a Flag Alone
❌ Errado: Failing a student because one paragraph was detected as AI.
✅ Direita: Ask for the writing report and the edit history before accusing anyone of using AI.
Solução de problemas do GPTZero
Problem: Your Own Essay Was Flagged
Causa: Plain, tidy sentence structure looks predictable to any AI detector.
Consertar: Open your GPTZero writing report and share the video replay of your drafting.
Problem: The Same Text Gives Different Results
Causa: Minor changes shift the score, and results can wobble on longer texts.
Consertar: Run the scan twice, then compare against a second detector before you decide.
Problem: A File Will Not Upload
Causa: Only PDF, DOCX and TXT files are supported.
Consertar: Convert the file first. Text inside images is skipped, so paste that part manually.
📌 Observação: If none of these help, contact GPTZero support.
O que é GPTZero?
GPTZero is an AI detector that tells you whether a document was written by a human.
Think of it as a smoke alarm for AI writing, not a courtroom verdict.
It compares your text against patterns learned from millions of documents.
Here is how GPTZero works when it separates human and AI text.
Two measures do most of the work: perplexidade and burstiness.
Perplexity basically measures how predictable your word choice is.
Burstiness looks at how much your sentence length varies across the page.
Human writing wanders. AI writing stays flat and even.
Unlike basic AI content detectors, it shows the reasoning behind each call.
That matters on real world drafts that mix both.
Veja esta breve visão geral:
These are the key features you get:
- Detector de IA: Paste text and get a probability score showing how much reads as AI generated
- Vocabulário de IA: Highlights the word choice patterns that make AI writing sound predictable
- Accurate Plagiarism Checker: A built in plagiarism checker that finds text matching existing online sources
- Free Grammar Checker: Free grammar feedback with suggestions that improve clarity and sentence structure
- Detector de alucinações: Flags invented claims and runs citation checks on the sources in your text
- Avaliador de IA: Grades assignments against uploaded rubric files with custom feedback prompts
- Verificação de autoria: Turns your writing process into a report that proves human authorship
- Análise avançada por IA: Sentence level highlighting with natural language explanations for each flag
- Integrações do Canvas: Connects to Canvas so teachers can scan assignments where they already grade
The company was built with education in mind and works with the American Federation of Teachers.
Research from escolas such as Penn State still shows that detection accuracy varies between tools.
So no detector is the best solution on its own.
Para uma análise completa, consulte nosso artigo. Análise do GPTZero.
Preços GPTZero
Here is what GPTZero costs in 2026:
| Plano | Preço | Ideal para |
|---|---|---|
| Livre | $0 | Students running the odd scan |
| Premium | $12.99 | Escritores e editores checking work weekly |
| Profissional | $24.99 | Teachers scanning whole classroom batches |
Teste grátis: Yes, the free plan runs forever with a word limit per scan.
Garantia de reembolso: Refunds are handled case by case through support.
💰 Melhor custo-benefício: Premium — it unlocks batch uploads and longer scans for the price of two coffees.
GPTZero vs Alternativas
How does GPTZero compare with the rest of the field?
| Ferramenta | Ideal para | Preço | Avaliação |
|---|---|---|---|
| GPTZero | Explaining every flag | US$ 12,99/mês | ⭐ 4 |
| QuillBot | Parafrasear e escrever | US$ 9,95/mês | ⭐ 4,5 |
| Originalidade IA | Publishers and agencies | US$ 14,95/mês | ⭐ 4,4 |
| IA Winston | Printable reports | US$ 12/mês | ⭐ 4,5 |
| Smodin | All in one toolkit | US$ 10/mês | ⭐ 4,2 |
| Quetext | Plagiarism on a budget | US$ 8,80/mês | ⭐ 4.1 |
| Indetectável | Multiple detector scores | US$ 9,99/mês | ⭐ 4,3 |
| IA Frasal | Students editing drafts | US$ 9,99/mês | ⭐ 4,2 |
| Grammarly | Everyday writing help | US$ 12/mês | ⭐ 4,6 |
Escolhas rápidas:
- Melhor no geral: GPTZero — it shows the reasoning behind every detected sentence.
- Melhor orçamento: Quetext — cheap plagiarism checking with AI detection attached.
- Ideal para iniciantes: Grammarly — friendly feedback that fixes your writing as you type.
- Melhor opção para editoras: Originality AI — team seats and scan history for content at scale.
🎯 Alternativas ao GPTZero
Procurando alternativas ao GPTZero? Aqui estão as melhores opções:
- 🚀 QuillBot: Fast paraphrasing and a solid free AI detector in one place, ideal for writers polishing drafts before a final scan.
- 🏢 Originalidade em IA: Built for publishers and agencies. Strong on AI detection plus plagiarism, with team seats and a full scan history.
- 📊 Winston AI: High accuracy claims and clean reporting. Popular with educators who want printable evidence for each document.
- 🧠 Smodin: A wide toolkit covering detection, rewriting and citations. Good value if you want more than one tool for the price.
- 💰 Quetexto: Budget friendly plagiarism checking with AI detection added. A simple pick for students on a tight budget.
- ⚡ Indetectável: Runs several AI content detectors at once and shows every score, which helps you double check a borderline result.
- 🎯 IA Frasal: Aimed at students who want feedback on AI phrasing before they submit an essay for grading.
- ⭐ Grammarly: Grammar, style and tone feedback with basic AI detection built in. The best solution if writing quality matters most.
Para ver a lista completa, consulte nosso Alternativas ao GPTZero guia.
⚔️ Comparação GPTZero
Here is how GPTZero stacks up against each competitor:
- GPTZero vs QuillBot: GPTZero wins on detection depth. QuillBot wins if you mostly need rewriting and quick grammar help inside one editor.
- GPTZero vs. IA Originalidade: Originality AI suits agencies and publishers. GPTZero fits classroom use better thanks to its writing report and Canvas support.
- GPTZero vs Winston AI: Both report high accuracy. GPTZero explains each flagged sentence, while Winston focuses on clean documents you can hand to a manager.
- GPTZero vs Smodin: Smodin bundles more writing tools. GPTZero stays sharper at detecting AI and gives clearer reasons for every result.
- GPTZero vs Quetext: Quetext is cheaper and plagiarism first. GPTZero is the better choice when AI detection is the main job.
- GPTZero vs Indetectável: Undetectable aggregates other detectors. GPTZero runs its own statistical analysis and shows you the reasoning behind it.
- GPTZero vs Phrasly AI: Phrasly AI targets students editing drafts. GPTZero serves both students and teachers with grading and verification tools.
- GPTZero vs Grammarly: Grammarly is a writing assistant first. GPTZero is a detector first, with far more detail on AI generated content.
Comece a usar o GPTZero agora mesmo
You now know how to use every major GPTZero tool:
- ✅ Detector de IA
- ✅ Vocabulário de IA
- ✅ Accurate Plagiarism Checker
- ✅ Free Grammar Checker
- ✅ Detector de Alucinações
- ✅ Avaliador de IA
- ✅ Verificação de autoria
- ✅ Digitalização avançada por IA
- ✅ Integrações com o Canvas
Próximo passo: pick one feature and try it today.
A maioria das pessoas começa com o Detector de IA.
Leva menos de cinco minutos.
Used properly, it supports critical thinking instead of replacing it.
That habit protects you and your future assignments.
Perguntas frequentes
Como usar o GPTZero?
Create an account, paste your text or upload a PDF, DOCX or TXT file, then run the scan. GPTZero returns a probability score with sentence level highlighting.
Can GPTZero detect ChatGPT?
Yes. GPTZero is trained to flag text from ChatGPT and other AI chatbot tools, including paraphrased output. It is accurate on longer texts but not perfect.
O GPTZero é gratuito?
Yes, the free plan costs $0 and covers basic scans. Premium is $12.99 and Professional is $24.99, which add batch uploads and higher word limits.
Por que o GPTZero diz que eu usei IA quando eu não usei?
That is a false positive. Clean, predictable sentence structure can look AI generated. Share your Writing Report as proof the essay was written by a human.
Quão precisa é a detecção por IA do GPTZero?
Accuracy is high on longer texts and weaker on short snippets. Independent testing shows results vary, so double check every flag before acting on it.
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