We live in a world where "AI Detection" is becoming a threat to content creators, students, and SEO professionals. One red flag from Turnitin or Originality.ai can get your paper rejected or your site penalized by Google.
StealthGPT claims to solve this. It promises to take any AI-generated text (from ChatGPT, Claude, or Jasper) and rewrite it so it is "100% Undetectable." But does it actually work, or does it just make the text sound like gibberish? In this StealthGPT review, we ran a live A/B test against the toughest detectors.
Quick Summary
The "Ghostwriter" Engine
StealthGPT is currently the only tool that consistently beats Originality.ai without making the text unreadable. It removes the "robotic patterns" (perplexity and burstiness) that detectors look for, leaving you with clean, human-sounding text.
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What StealthGPT Actually Does
AI detectors (like GPTZero and Turnitin) work by looking for patterns. AI is predictable; humans are chaotic.
StealthGPT takes your predictable AI text and "humanizes" it. It varies sentence length, changes vocabulary, and introduces "burstiness" (variation in structure). Unlike Quillbot, which just swaps synonyms, StealthGPT rewrites the logic of the sentence to bypass deep detection algorithms.
Core Features
How to Use StealthGPT — The Test
We wanted to prove if this actually works. We ran a "Bypass Test" using a 500-word essay on "The History of Roman Concrete."
- The Trap: We generated the essay using GPT-4. We scanned it with Originality.ai. Result: 100% AI (Flagged).
- The Humanize: We pasted that same text into StealthGPT and selected the "High Stealth" mode. It took about 20 seconds to rewrite.
- The Verification: We took the new text and scanned it again with Originality.ai.
- The Result: 98% Original / 2% AI. It completely fooled the detector.
Example Use Cases
Who StealthGPT Is Best For
- Content Agencies: Who use AI to scale but need to deliver "Human" work to clients.
- ESL Writers: Non-native speakers who use AI to fix grammar but don't want to be flagged.
- Academics: Researchers processing large amounts of text summaries.
Who Should Avoid StealthGPT
- Purists: If you want 100% original thought, write it yourself. StealthGPT is a re-writer.
- Technical Writers: Sometimes the "humanization" can change the meaning of complex code or technical definitions. Always proofread.
Pricing & Plans
- 100,000 Words / month
- Stealth Engine Access
- Standard Response Time
- 500,000 Words / month
- Samurai Engine (Faster)
- Uploader (PDF/Doc)
- Smart SEO Writer
How StealthGPT Compares
| Feature | StealthGPT | Undetectable.ai | Quillbot |
|---|---|---|---|
| Beats Originality 3.0? | Yes (High) | Hit or Miss | No |
| Text Quality | Excellent | Good | Good |
| Pricing | $14.99/mo | $9.99/mo | Free / $9 |
| Bulk Processing | Yes | Yes | No |
Limitations & Reality Check
- Occasional Grammar Errors: In its attempt to sound "human" (and imperfect), StealthGPT sometimes introduces slight grammar quirks. You must read the output before publishing.
- Word Count Limits: Even on the Pro plan, you have a monthly word limit. If you are generating 100 articles a day, you will need the Enterprise plan.
Best Practices: "The Iterative Method"
Don't trust the first result blindly.
Pros & Cons
- Consistently beats Originality.ai (the hardest test).
- "Samurai Engine" handles long texts very fast.
- API access allows you to build it into your own apps.
- Preserves formatting better than competitors.
- Slightly more expensive than Undetectable.ai.
- Output can sometimes be slightly shorter than input.
- No permanent free tier (only trial/limited).
Frequently Asked Questions
Does it work on Turnitin?
In our tests, Yes. StealthGPT is specifically tuned to bypass the pattern recognition used by academic checkers like Turnitin and Canvas.
Is StealthGPT free?
No, it is a paid tool. However, they often offer a limited trial or a low-cost testing period so you can verify it works before committing.
Is using it legal?
Yes, using an AI rephraser is legal. However, using it to submit academic work as your own may violate your institution's honor code. Use it responsibly.
Does it support other languages?
StealthGPT is primarily optimized for English, but they are expanding support for major languages like Spanish and French. Check their latest updates for full support.
Why did my text still get flagged?
Detectors update constantly. If you get flagged, try increasing the "Randomness" setting in StealthGPT or rewriting the input prompt to be less generic.
Final Verdict
The AI detection war is heating up, and StealthGPT is currently winning.
While free tools like Quillbot fail against modern detectors, StealthGPT's dedicated "Stealth Engine" provides the necessary randomness to pass as human. For SEOs protecting their rankings and creators protecting their reputation, it is an essential insurance policy.
Make Your Text Undetectable Now →
