ZeroGPT Review: AI Detection Accuracy & Insights
Free AI detector with generous input limits and simple interface.
Snapshot Verdict
ZeroGPT is a convenient first‑pass detector, matching GPTZero’s 65 % accuracy in RAID but prone to false negatives—use it only for low‑stakes checks. Also the false positive is the highest compared to other paid detectors tools (Originality, Turnitin...).
Adversarial Robustness
Easy to bypass via paraphrasing
How the Detection Algorithm Works
Proprietary DeepAnalyse™ model layers macro‑level entropy metrics and micro pattern analysis to estimate AI probability, returning a percentage and sentence highlights.
Free, No Sign‑Up
Check up to ~15 k chars anonymously.
DeepAnalyse™ Engine
Multi‑level assessment claims high recall.
API & Pro Limits
Paid tiers unlock higher quotas and JSON API.
Benchmark Results
| Benchmark | Accuracy | False Positive | Adversarial Robustness | Notes |
|---|
| RAID (6M docs) | 65.5% | 0.9% | Fails under paraphrase tricks | Similar accuracy to GPTZero base |
| Other Studies | % | % | | Not in OIS study |
ZeroGPT’s low barrier to entry makes it ubiquitous, but inconsistent detection on paraphrased AI text means it should be paired with a stronger secondary tool when accuracy matters.
Pricing
Core checker is free; Pro subscription (~$9.99/mo) boosts limits and removes ads, while API pricing is pay‑per‑request.
Free
$0
Limited checks
- 15 k char per scan
- No login required
- Sentence highlights
Get StartedBest Value
Pro
$9.99 / month
Unlimited words
- Faster processing
- No ads
- Priority queue
- Early feature access
Get Started API
From $0.002 / call
Pay‑as‑you‑go
- JSON responses
- Bulk batching
- Usage dashboard
- Volume discounts
Get StartedBest Use Cases
Education
Students self‑checking essays quickly.
Publishing / SEO
Bloggers getting instant AI score.
Compliance / Legal
N/A due to high FN risk.
Enterprise Workflows
Developers integrating low‑cost API.
Top Alternatives & Competitors
Looking to explore other AI detection tools? Here are our curated picks with quick highlights so you can compare at a glance.
GPTZero
Low false positives, freemium
Accuracy 66.5%
Free & Paid
Copyleaks AI
Higher accuracy, paid plans
Accuracy 100%
From $9.99 / month
Originality.ai
Paraphrase‑robust premium detector
Accuracy 85%
From $0.01 / 100w
Final Verdict
Use ZeroGPT for quick, free impressions, but verify critical documents with a more sensitive detector because clever rewrites frequently evade its DeepAnalyse™ engine.
Start Using ZeroGPT 
