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Grok AI Detector for Grok 4.6, 4.5 and 4.20

Paste an X post, article, essay, or document to check for Grok-generated writing. Review AI, mixed, and human scores plus the sentences that influenced the result.
Content
Paste Text⌘Vor click
Upload DocumentTXT.DOCX.PDF
Try Example:
ChatGPT
Claude
Human
Human + AI
0 words
Result
AI-generated
?%
Mix-generated
?%
Human-written
?%
Add text and click "Detect AI" to see the results.
Highlighted AI-Generated/Paraphrased Sentences
List sentences likely AI-generated here
Icon of statistics showing 350K+ Grok AI detector scans performed monthly
350K+
Scans Performed Monthly
Icon of statistics indicating a 99% Grok AI detector accuracy rate
99%
Proven Accuracy Rate
Icon of statistics representing a 4.9 average user rating for Grok AI detection
4.9
Average User Rating
grok ai detector basis signals illustration

On What Basis Does Grok AI Detector Work?

Being like the Gen-Z of AI tools, Grok has a fun, witty personality. It uses famous slang, names, and memes to answer basic questions. The sarcastic tone of Grok makes it difficult for AI detectors to differentiate Grok-generated content from human-written work. A Grok AI detector is specifically designed to catch the edgy personality of Grok.

Why Choose Our Grok AI Detector

Icon of Grok model coverage for Grok 4.6, 4.5, 4.20 text detection

Current Grok Model Coverage

Check writing from Grok 4.6, Grok 4.5, Grok 4.20, and earlier Grok model families.

Icon of sentence-level evidence showing AI detection highlights

Sentence-Level Evidence

See which lines look AI-written or mixed instead of relying on one document-level score.

Icon of detecting edited Grok drafts including paraphrased or shortened text

Edited Draft Detection

Review Grok output that has been shortened, paraphrased, or partly rewritten by a person.

Icon of file input with options to paste text or upload files for Grok detection

Paste or Upload Files

Paste text directly or upload a DOCX, PDF, or TXT file without converting it first.

Icon of percentage scores for AI, mixed, and human Grok detection results

AI, Mixed, Human Scores

Read three separate percentages so blended drafts are not forced into a simple yes-or-no label.

Icon of privacy and no-training policy for Grok AI detector text processing

Private Text Processing

Keep the existing no-training and privacy positioning already approved on this page.

An image showing Grok 4.6, 4.5, and 4.20 text routed into AI, mixed, and human detection results

Detect Grok 4.6, Grok 4.5 and Grok 4.20 Text

Use the Grok AI text detector to check output from current Grok model families, including Grok 4.6, Grok 4.5, and Grok 4.20. Lynote analyzes the submitted writing and returns AI, mixed, and human probabilities instead of trying to identify authorship from tone alone.
An image showing sentence-level Grok AI detection highlights for AI, mixed, and human passages

See Which Sentences Look AI-Written

A single percentage cannot show what triggered the result. Lynote highlights the sentences that carry stronger AI-writing signals, helping you separate a fully generated passage from a draft that combines Grok output with human editing.
An image showing X posts, articles, and document files entering the Grok AI detector

Check X Posts, Articles and Uploaded Documents

Paste a long X post, reply, article, or essay into the detector, or upload a DOCX, PDF, or TXT file. This keeps the review focused on Grok AI writing rather than forcing every source into the same copy-paste workflow.

Which Grok Models Can This AI Detector Check?

Use the Grok AI detector to check writing produced or edited with Grok 4.6, Grok 4.5, Grok 4.20, and earlier Grok models. The report evaluates the submitted text and returns AI, mixed, and human probabilities with sentence highlights.

Current and Earlier Grok Models

Current model focus: Grok 4.6 is xAI's current flagship, while Grok 4.5 and Grok 4.20 remain important recent model families for generated text.

Earlier model support: You can also check writing from Grok 4.1, Grok 4 Fast, and Grok 3. These names are included as earlier model families, not presented as current releases.

How to read the result: Lynote identifies AI-writing signals in the submitted passage. A probability report can support review, but it cannot prove which exact Grok version produced the text.

If the source model is unknown, use the general AI detector to screen the draft across model families.

Grok 4.6Grok 4.5Grok 4.20Grok 4.1Grok 4 FastGrok 3
Grok AI Writing Signals
Pattern RepetitionHigh
Sentence PredictabilityHigh
Lexical VariationMedium
Human-AI Style ShiftsMedium
3-WayProbability Report
3File Formats
6Grok Model Families

How to Check Text With the Grok AI Detector

Paste Text or Upload a File

Paste Text or Upload a File

Paste the suspected Grok text into the input box, or upload a DOCX, PDF, or TXT file. Longer samples usually give the report more writing patterns to evaluate.

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Click Detect AI

Click Detect AI

When the text is ready, click Detect AI. This button label stays unchanged because it matches the live interface.

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Review the Score and Highlights

Review the Score and Highlights

Compare the AI, mixed, and human percentages, then read the highlighted sentences. Use the result as a review signal alongside the draft history, sources, and context.

Who Should Use This Grok AI Detector?

Icon of educator screening essays with the Grok AI detector

Educators

Screen essays and assignments for Grok-style AI writing, then review the highlighted passages before making an academic-integrity decision.

Icon of content editor reviewing drafts for Grok AI assistance

Content Editors

Check articles and contributor drafts for Grok-assisted sections before editing, approving, or requesting source notes.

Icon of social media reviewer checking X posts with the Grok detector

Social Media Reviewers

Review long X posts, threads, and replies when you need more than a quick judgment based on tone.

Icon of journalist using Grok AI detector to review source documents

Journalists

Check submitted statements, press materials, or source-provided documents and identify passages that need closer verification.

Icon of community moderator screening forum posts for Grok AI writing

Community Moderators

Screen longer forum posts or repeated replies for AI-writing signals without treating every polished sentence as proof of automation.

Icon of publisher reviewing manuscripts with Grok AI detection

Publishers

Review manuscript chapters, reports, or edited drafts and separate likely AI-heavy passages from mixed human-AI writing.

Which Type of Grok Content Does Lynote AI Detect?

ai detector grok content types illustration
  • Website Content: Website content has only two requirements for ranking: SEO optimization and AI review. Grok supports the generation of engaging content, but Google can still detect such content as written by AI. To review AI-like signals in your content, run it through Grok AI Detector.
  • Grok Essays: Are students using Grok AI to write essays and make them seem human-written? You can utilize Lynote Grok AI Detector to check Grok-specific patterns in their long essays.
  • Grok Blog Posts: Grok can help generate blog posts with trendy topics, but what about AI detection? Lynote helps to detect and edit AI before you post it online.
  • Grok Emails: Suspicious of your employees using Grok to generate their official emails? Get rid of your suspicions with our free Grok AI Detector.
  • Cover Letter: While Grok can create a polished cover letter, human input still matters. Use our AI detector to see which parts of the cover letter are AI-generated.
  • Research Papers: Grok AI Detector works on research papers at a sentence level. This assists it in flagging all fully, partially AI-generated, and completely human-generated Grok documents.
  • Marketing Copy: Do you wonder if your Grok-crafted marketing copies can pass AI review? Seek help from Lynote AI Detector to review the signals.

Where to Use Lynote Grok AI Detector?

ai detector for grok use cases illustration
  • Verifying Social Media Content: Lynote Grok AI Detector thoroughly reviews a post or a picture and can give accurate reports about its human or AI-based creation.
  • Brand Identity Maintenance: Every brand has its unique identity. AI-generated content can make all the brands look the same. Use our AI detector to review AI-generated scripts and keep only the content that aligns with your brand identity.
  • Check News Authenticity: Ensure whether a news article is just information compiled by Grok from X or a genuine live update from a reliable source.
  • Content Review Before Publication: AI-generated content can have quality issues. You should publish original and human-written content. For this, pass every post through Lynote AI Detector.

What Our Users Say About Lynote AI Detector for Grok

Sina

Social Media Lead

starstarstarstarstar

“Whether its Grok or other AI tools, detecting AI-generated content is so much easier with Lynote AI Detector”

Yixing Z.

Political Analyst

starstarstarstarstar

“Lynote Grok AI detector is very easy to use for me. It helps me generate AI reports within seconds and saves lots of my time”

Aisha

PR Manager

starstarstarstarstar

“Grok Users can fool others but not this AI detector. I often run all the scripts provided by my writers through this tool before accepting them to ensure authenticity”

News Editor

News Editor

starstarstarstarstar

“Recently came across a new article that almost sounded true. This tool helped us detect that it was generated by Grok. It is very accurate”

Sham K.

Influencer

starstarstarstarstar

“I sometime use Grok to create content for my audience but first run it through this tool. In this way i can mix human-written and Grok content to make something more engaging.”

Jimmy

Community Manager

starstarstarstarstar

“People use bots to gather attention on their posts. We use this AI detector as a strainer to detect AI content and keep our discord bot-free”

Grok AI Detector FAQ

Answers about current Grok models, uploaded files, short text, probability scores, false positives, privacy, and next steps.

Yes. The page is designed to screen writing produced or edited with current Grok model families, including Grok 4.6, Grok 4.5, and Grok 4.20. The score identifies AI-writing signals; it does not prove which exact model generated the text.

Yes. You can also submit output from earlier Grok models. Because model behavior and human editing can change the final writing, review the sentence highlights and context rather than relying on the model name alone.

It evaluates patterns across the submitted text and returns AI, mixed, and human probabilities. For a deeper explanation of the scoring approach, read <a href="/blog/how-do-ai-detectors-work">how AI detectors work</a>.

Yes. Upload a DOCX, PDF, or TXT file, or paste text directly into the input box.

You can check short text, but a brief post gives the detector fewer sentence and structure patterns to evaluate. When possible, include the complete post, thread, or surrounding passage.

AI indicates stronger machine-writing signals, mixed points to blended or edited passages, and human indicates fewer AI-like patterns. Read the highlights with the percentages rather than treating one number as a final verdict.

Any AI detector can produce false positives, especially on rigid, formulaic, or very short writing. Compare flagged passages with drafts, sources, and prior writing; see the guide to <a href="/blog/ai-detection-false-positives">AI detection false positives</a> for a fuller review process.

No. This is a Grok AI writing detector for text. Use the separate <a href="/ai-image-detector">AI image detector</a> when you need to evaluate an image rather than written content.

No. Your pasted text and uploaded documents are processed for detection and are not used to train AI models.

Review the highlighted sentences, confirm the sources and disclosure requirements, and revise only the passages that need work. If the goal is to make an AI-assisted draft read more naturally, continue with the <a href="/ai-humanizer">AI Humanizer</a>.

Generate An Accurate Grok AI Report with Lynote

Use the Lynote Grok AI Content Detector to screen AI-generated content from blogs, news articles, and essays. It ensures the content you are working with remains authentic.

More Lynote Tools for Grok Checks, AI Review, and Final Content Cleanup

After checking Grok-written text, continue with related Lynote tools for AI detection, humanizing, paraphrasing, rewriting, and final content review.
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Learn More About AI Text Detection

Understand detector scores, false positives, and the evidence to review before making a decision about Grok-generated writing.

How Do AI Detectors Work? Models, Signals, Scores, and Limitations

Are AI Detectors Accurate? The Truth About Reliability & False Positives

AI Detection False Positives: Causes, Tools, and How to Avoid Them