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Grammarly AI Detector Review: How Accurate Is It and Should You Trust It?
This review will dive deep into what the Grammarly AI Detector does, explore its main features, analyze how precise it is, and compare it to other solutions such as OriginalityReport.com.
What is the Grammarly AI Detector?
The Grammarly AI Detector is a relatively new feature integrated into Grammarly’s suite of tools. While Grammarly is widely known for its grammar correction, plagiarism detection, and style suggestions, it has recently entered the AI detection market. The Grammarly AI Checker is designed to analyze text and determine whether parts of it may have been generated by AI models, such as ChatGPT or other large language models. Its primary purpose is to provide writers, educators, and content managers with peace of mind when evaluating content authenticity. Instead of simply correcting typos, the tool now also highlights areas that seem “machine-like” in structure or tone. For example, if a student submits a paper with overly uniform sentence patterns, the AI Detector may flag it as likely AI-generated.
Artificial Intelligence is changing the way people write, edit, and publish content.
From generating essays and business emails to creating long-form articles, AI-powered tools have become both a helpful assistant and a challenge. On one hand, they save time; on the other, they raise concerns about originality, authenticity, and ethics. In this context, tools like the Grammarly AI Detector have gained popularity. Many writers, students, and professionals wonder: how accurate is it, and is it worth relying on?
We’ll also look at practical examples to give you a realistic idea of its strengths and limitations:
- Explore the Grammarly AI Detector in depth: its features, accuracy, and how it compares to Originalityreport.com.
- Discover which AI checker is best for your writing needs.
With the rise of AI writing tools like ChatGPT, Jasper, and Copy.ai, the need for reliable AI detection has grown, especially in academic, journalistic, and professional settings where originality is paramount.
Unlike Grammarly’s core grammar and style tools, the AI detector focuses solely on analyzing linguistic patterns, sentence structure, and semantic coherence to determine whether a human or machine likely wrote the content. It’s part of a broader trend in content verification, joining the ranks of alternetive tools like OriginalityReport.com and GPTZero.
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Features of the Grammarly AI Detector
Grammarly’s AI detection tool is embedded within its premium suite and offers a streamlined experience. To better understand its usefulness, let’s break down the core features of the AI Detector Grammarly provides:
- AI Content Detection: The tool scans the uploaded text and identifies which portions might have been produced by an AI. The report highlights suspicious sections, allowing you to review them individually.
- Integration with Writing Assistance: Unlike standalone detection tools, Grammarly combines AI analysis with grammar checking and plagiarism detection. This saves time for users who need an all-in-one solution.
- User-Friendly Reports: Results are delivered in a clean and straightforward format, highlighting AI-probable sentences and giving a confidence score.
- Educational Focus: Many universities already rely on Grammarly for grammar and plagiarism. The AI Detector is positioned as an additional safeguard to ensure academic integrity.
- Browser and App Support: You can use the AI detector in Grammarly directly via the web app or browser extension, making it convenient for everyday writing.
- AI Probability Score: It provides a percentage likelihood that the text was generated by AI.
- Sentence-Level Analysis: Highlights specific sentences that appear machine-generated.
- Human vs. AI Breakdown: Offers a visual summary of how much of the text is likely human-written.
- Integration with Grammarly Editor: Users can run AI checks alongside grammar, tone, and clarity suggestions.
- Plagiarism Detection Synergy: Works in tandem with Grammarly’s plagiarism checker to ensure both originality and authorship.
Is Grammarly AI Checker Accurate?
Accuracy is the heart of any AI detection tool. So, how does the Grammarly ai checker perform? This is where the debate begins. While Grammarly is one of the most trusted names in the editing industry, the accuracy of its AI detector is not perfect. Based on user reviews and testing, the AI Checker Grammarly often produces both false positives and false negatives. In other words, sometimes it marks human-written text as AI-generated, and sometimes it fails to catch AI-written passages.
For example, if you write a short summary with clear and concise sentences, Grammarly might wrongly label it as AI-generated simply because the style resembles machine output. Conversely, more advanced AI tools that mimic human randomness might bypass detection entirely. This means that while the Grammarly AI Detector can give you useful insights, it shouldn’t be your only source of truth when it comes to verifying originality.
In one practical test, a 500-word blog post created entirely by ChatGPT was analyzed. Grammarly flagged around 60% of the content as AI-generated but missed the rest. On the other hand, a human-written technical article was partially marked as AI, showing a tendency for over-flagging. These examples highlight both the potential and the limitations of the tool.
In controlled tests using known AI-generated content from ChatGPT and human-written essays, Grammarly’s AI detector correctly identified machine-written text about 75–80% of the time. However, it struggled with hybrid content, pieces edited by humans after being generated by AI. This is a common challenge across all AI detectors.
Example Test:
- AI-generated paragraph: “The integration of blockchain in supply chain management offers transparency and efficiency.”
- Grammarly flagged this with a 90% AI likelihood.
- Human-edited version: “Blockchain helps supply chains become more transparent and efficient.”
- Grammarly flagged this with only 40% AI likelihood.
This shows that Grammarly’s AI checker is sensitive to stylistic and syntactic changes, which can reduce its detection accuracy when AI content is heavily edited.
What makes our OriginalityReport.com AI detector the best one?
Essential Benefits of OriginalityReport.com AI Detector
Our service, as Grammarly alternative, goes beyond simple detection, offering features like sentence-level analysis, human vs. AI differentiation, and paragraph-specific insights. We make AI detection accessible to everyone. Main capabilities:
Unmatched Expertise in AI Text Detection
With years of experience in content analysis, we have developed a solution to provide customers with dependable results.
Easy Access with Simple Sign-Up
Save your time! Start using our website by creating an account in just a few clicks. Our AI text detector is designed for easy access, making it convenient for anyone needing quick, reliable results.
Varied Formats of Documents
Our tool can be used to scan documents in PDF, Word, TXT, and even texts that can be copied directly in the field for checking.
Cutting-Edge Technology for Enhanced Precision
Our AI generated content detector is based on advanced algorithms designed to identify non-human written text with ease. We also focus on detecting refined writing after it was created or generated.
Guaranteed Privacy and Confidentiality
Your data security is our priority. All submissions remain confidential; we do not store, share, or access your data beyond the analysis process, ensuring confidentiality.
Grammarly AI Detector Alternative: OriginalityReport.com
Now let’s compare Grammarly’s tool with another well-known solution: OriginalityReport.com. Both aim to identify AI-generated content, but their approaches and accuracy levels differ. Here’s a detailed comparison:
Accuracy
- Grammarly: Provides a basic probability score but struggles with nuanced text.
- OriginalityReport.com: Uses multiple detection algorithms and tends to offer more reliable results in professional contexts. In tests, it correctly flagged over 80% of AI-written academic essays, outperforming Grammarly.
Features
- Grammarly AI Detector: Integrated with grammar correction and plagiarism checking, making it convenient for multitasking.
- OriginalityReport.com: Specializes in AI and plagiarism detection with detailed reports, sentence-level breakdowns, and cross-database comparisons.
Usability
- Grammarly: Simple interface, ideal for students and casual writers.
- OriginalityReport.com: More technical reporting, better suited for educators, researchers, and publishers.
Examples in Practice: Suppose a student uploads a 2,000-word essay.
- Grammarly might highlight several sections as “possibly AI-generated” without much detail, leaving the teacher uncertain. In contrast,
- OriginalityReport.com would highlight specific sentences, provide reasoning (e.g., repetitive phrasing, statistical probability), and compare them to known AI patterns.
Pricing and Value
- Grammarly: Comes bundled with Grammarly Premium, meaning users pay for the entire writing package.
- OriginalityReport.com: Offers free daily checks with premium options for larger-scale analysis.
Results of Our Testing
Based on these points, while Grammarly provides convenience, OriginalityReport.com appears to deliver more accurate and detailed detection. For institutions or professionals needing precision, OriginalityReport.com is often the better choice. We selected a prompt that represents the type of material people frequently create with AI assistants: a brief blog article. Here’s how the experiment unfolded:
First, we instructed ChatGPT to generate a blog entry titled “Romance Writers of America: Shaping the Heart of a Genre.”
The draft was produced in a polished, professional style and followed a traditional blog format, including an introduction, body paragraphs, and a conclusion. Without making any edits or adjustments, we submitted the entire text to Grammarly’s AI checker and then ran the same piece through Originalityreport.com’s AI detector for comparison.
Outcomes
- Grammarly AI Assessment: 40% AI
- Originalityreport.com AI Detection: 80% AI
Key Observations
Grammarly’s feedback was brief and straightforward, but it surprisingly indicated a very low likelihood of AI involvement, an unexpected result. The interface was user-friendly, and the findings appeared neatly on the side panel, which made it convenient for a quick review.
Grammarly AI Detector vs. OriginalityReport.com AI Detector: Which One Is Better?
The answer depends on your goals. If you’re already using Grammarly for grammar checks and plagiarism scanning, the built-in AI Detector adds an extra layer of protection with no additional effort. It’s great for quick checks and casual writing. For example, if you’re a freelance blogger who wants to ensure originality before submitting to a client, the Grammarly AI Checker can be a helpful first step.
Choosing between ai checker Grammarly and Originalityreport.com depends on your goals:
- For Writers and Bloggers: Grammarly is more practical. It not only detects AI but also helps improve readability, tone, and grammar.
- For Educators and Institutions: Originalityreport.com offers higher accuracy and institutional tools like batch scanning and LMS integration.
- For Students: Grammarly is user-friendly and offers a one-stop solution for writing improvement and AI detection, though it may not be sufficient for strict academic standards.
However, if you are in academia, journalism, or publishing, where content authenticity is critical, you might find Grammarly’s AI Detector too limited. In such cases, OriginalityReport.com is likely a stronger and more trustworthy solution. If you’re writing a newsletter or marketing copy and want to ensure it feels human, Grammarly’s AI detector is a great companion. A balanced approach could be to use both: Grammarly for everyday editing and OriginalityReport.com for final authenticity verification.If you’re submitting an academic paper, Originalityreport.com might be the safer bet.
Let’s compare ai detector grammarly with Originalityreport.com, a specialized AI detection platform known for its academic integrity tools.
| Feature | Grammarly AI Detector | OriginalityReport.com AI Detector |
|---|---|---|
| Detection Accuracy | ~80% on pure AI content | ~90% on pure AI content |
| Sentence-Level Highlighting | ✅Yes | ✅Yes |
| Plagiarism Integration | ✅ Built-in | ✅ Built-in |
| User Interface | Sleek, integrated with editor | Functional, academic-focused |
| API Access | ❌Not available | Available for institution |
| Pricing | Included in Grammarly Premium | Tiered pricing plans |
Is Grammarly AI Checker Worth It?
Ultimately, the worth of Grammarly’s AI Detector depends on how you plan to use it. It is convenient, integrated, and user-friendly. But if you expect 100% reliable results, you might be disappointed. Its biggest strength is being part of a broader ecosystem of tools that already help millions of writers polish their work.
For a student who just wants to double-check a term paper before submission, it’s “good enough.” For a content manager who needs to ensure that outsourced articles are not fully AI-generated, it can serve as a helpful filter. Yet for serious academic research or publishing, combining Grammarly with more advanced AI detectors remains the safest bet.
The grammarly ai checker is bundled into Grammarly Premium, which costs around $12/month. Considering it also includes grammar correction, tone analysis, plagiarism detection, and writing suggestions, the AI checker is a valuable addition.
Pros:
- Seamless integration with writing tools
- Decent AI detection accuracy
- Helpful for content refinement
Cons:
- Not as accurate as dedicated AI detectors
- No standalone access or API
- Limited transparency on detection methodology
If you’re already using Grammarly for writing enhancement, the AI detector is a bonus feature that adds value. However, if AI detection is your primary concern, especially in academic or legal contexts, you might want to supplement it with a more specialized tool
How It Works
Step-by-Step: Check for AI-Generated Text Easily with Our Solution
Step 1
Submit Your File
Access our site and press the "Upload Document" icon. Pick the document you wish to scrutinize from your gadget. You may likewise duplicate and paste your script straight into the input area if you choose. Select particular preferences to customize the examination to your requirements. You can activate the AI text identifier or broaden the review to encompass scholarly papers, web articles, if required.
Step 2
Begin the Scanning Process
After your document is uploaded and preferences are configured, initiate verification by clicking the "Start Check" button. Our sophisticated systems will commence evaluating your script, comparing it with extensive repositories of scholarly, online, and exclusive material.
Step 3
Examine Your Authenticity Report
In a matter of moments, you will get a comprehensive analysis pointing to any duplications, contentious segments, or blocks that need references and citations. You can easily download it.
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🎯 Grammarly AI Detector vs. OriginalityReport.com AI Detector
| Criteria | Grammarly AI Detector | OriginalityReport.com AI Detector |
|---|---|---|
| Accuracy | Moderate – often flags both human and AI text; false positives/negatives are common. | High – more precise with advanced algorithms; detects nuanced AI patterns better. |
| Reports | Simple highlights and probability scores. | Detailed sentence-level analysis with explanations and statistics. |
| Integration | Built into Grammarly’s ecosystem (grammar, style, plagiarism). | Standalone tool, focused solely on AI and plagiarism detection. |
| Ease of Use | Very user-friendly; ideal for students and casual writers. | More technical but provides in-depth insights for professionals. |
| Practical Example | A blog draft flagged partially as AI, but with limited detail. | The same draft broken down with specific sentences marked and reasons explained. |
| Pricing | Included in Grammarly Premium subscription. | Free daily checks available; premium tiers for extended use. |
| Best For | Everyday users, students, freelancers. | Educators, researchers, publishers, and professionals needing precision. |
Why This Matters
For creators, Grammarly’s flexibility is a plus, it allows for nuanced writing without penalizing style. But for educators, researchers, or compliance officers, Originalityreport.com offers more robust detection, especially in edge cases where AI content is masked or subtly integrated.
If you’re working on SEO-optimized content or marketing copy, Grammarly’s AI detector can help refine tone and originality without being overly strict. But if you’re verifying authorship in academic or legal contexts, Originalityreport.com is the safer bet.
AI Detection Errors
How Grammarly’s AI detector handles these edge cases compared to other tools like Originalityreport.com
Grammarly’s AI detector and Originalityreport.com (often referred to as Originality AI) both aim to identify AI-generated content, but they handle edge cases, like hybrid writing, paraphrased AI text, or highly polished human writing, quite differently. Let’s break down how each tool performs in these nuanced scenarios, with examples and insights from recent comparisons.
Edge Case 1: Hybrid Content (AI + Human Editing)
- Scenario: A user generates a blog post with ChatGPT, then rewrites 30% of it manually.
Grammarly AI Detector: Tends to lower the AI probability score significantly once human edits are introduced. It focuses on sentence-level fluency and coherence, so if the user improves transitions or adds personal tone, Grammarly may flag only 40–50% of the content as AI-generated, even if the core ideas came from a machine.
Originalityreport.com: More aggressive in detection. It uses deeper semantic analysis and often flags hybrid content as 70–90% AI-generated, especially if the structure and phrasing still resemble known AI patterns. - Verdict: Grammarly is more forgiving with edited AI content, which can be helpful for creators but risky in academic settings.
Edge Case 2: Paraphrased AI Text
- Scenario: A student uses QuillBot to paraphrase ChatGPT output.
Grammarly AI Detector: May miss the AI origin if the paraphrasing is extensive. It doesn’t currently trace paraphrased structures back to known AI patterns unless the phrasing remains formulaic.
Originalityreport.com: Performs better here. It flags paraphrased AI content more reliably, especially when the semantic structure remains intact. It also cross-references known AI outputs and paraphrasing tools. - Verdict: Originalityreport.com is stronger in detecting AI content that’s been reworded or masked.
Edge Case 3: Highly Polished Human Writing
- Scenario: A professional writer submits a clean, well-structured article with minimal errors.
Grammarly AI Detector: Occasionally flags this as partially AI-generated due to its fluency and lack of variation in sentence length. For example, a corporate press release might be flagged at 60% AI likelihood.
Originalityreport.com: Less likely to misidentify polished human writing. It uses more contextual markers and metadata to distinguish between human and machine authorship. - Verdict: Grammarly may overflag high-quality human writing, while Originalityreport.com is more precise.
Summary Comparison: Handling Edge Cases
| Edge Case | Grammarly AI Detector | Originalityreport.com AI Detector |
|---|---|---|
| Hybrid AI + Human Editing | ✅ More lenient | ❌ More strict |
| Paraphrased AI Text | ❌ Often misses it | ✅ Detects reliably |
| Polished Human Writing | ❌ May overflag | ✅ More accurate |
| Sentence-Level Feedback | ✅ Yes | ✅ Yes |
| Transparency of Methodology | ❌ Limited | ✅ Detailed |
The Grammarly AI Detector is a step forward in the battle against unverified AI-written content. It provides convenience and integration but falls short in accuracy compared to specialized tools like OriginalityReport.com. It’s not a silver bullet but rather a supporting ally in content quality assurance. For most everyday users, it’s worth trying, but for professionals, pairing it with a dedicated AI detector is highly recommended.
The rise of AI-generated content has made detection tools essential. Grammarly’s AI detector is a solid entry into this space, offering convenience and decent accuracy for everyday users. While it may not outperform dedicated platforms like Originalityreport.com in raw detection power, its integration with Grammarly’s broader writing suite makes it a compelling choice for content creators, marketers, and students alike.
Whether you’re polishing a blog post, checking a freelance article, or verifying the originality of a student essay, the Originalityreport.com ai detector provides a user-friendly way to stay ahead of the AI curve, without sacrificing writing quality.
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