AI Detector Accuracy Study 2026
We tested 15 AI-generated text samples across multiple humanization modes. Real data, real results, no cherry-picking.
Raw AI detection
Before humanization
Single pass
14/15 passed
Double pass
14/15 passed
Academic mode
13/15 passed
Standard mode achieves 93% pass rate on first try
WriteMask's Standard mode passed 14/15 samples (93%) as “Likely Human” with an average score of just 27% — down from 80.5% raw. Academic mode achieved 87% pass rate for scholarly content. For best results, check with our free detector after humanizing.
Mode Comparison
| Method | Avg Score | Pass Rate | Reduction |
|---|---|---|---|
| Raw AI text | 80.5% | 0% | — |
| Standard (single pass) | 27% | 93% (14/15) | 66% |
| Standard (double pass) ★ | 26.1% | 93% (14/15) | 68% |
| Academic mode | 31.2% | 87% (13/15) | 61% |
Sample-by-Sample Results
| Topic | Raw | Pass 1 | Pass 2 | Academic |
|---|---|---|---|---|
| Social media impact | 78% | 22% | 14% | 28% |
| Climate change | 82% | 22% | 18% | 35% |
| AI in healthcare | 82% | 22% | 22% | 18% |
| Remote work | 72% | 22% | 22% | 28% |
| Education technology | 78% | 22% | 22% | 22% |
| Renewable energy | 82% | 22% | 22% | 42% |
| Mental health | 82% | 22% | 32% | 42% |
| Sustainable agriculture | 82% | 35% | 32% | 55% |
| Digital privacy | 78% | 22% | 22% | 22% |
| Urban planning | 82% | 32% | 28% | 28% |
| Online learning | 82% | 18% | 18% | 14% |
| Social inequality | 82% | 22% | 18% | 22% |
| Blockchain | 82% | 62% | 62% | 28% |
| Water scarcity | 82% | 42% | 42% | 62% |
| Global trade | 82% | 18% | 18% | 22% |
Cyan = passed (<50%). Yellow = detected (>50%). All tests used WriteMask with our built-in AI detector.
Key Findings
93% pass rate on Standard mode — single pass
14 out of 15 samples passed as “Likely Human” after a single Standard humanization pass. Average detection score dropped from 80.5% to just 27%. Most samples scored 22% or below — well within the range of genuine human writing.
Scores as low as 14%
Social media impact scored just 14% after double-pass — virtually indistinguishable from human writing. Climate change hit 18%, and 11 out of 15 topics scored 22% or below on first pass. These aren't marginal passes — they're decisive.
One topic resisted
Blockchain (62%) was the only sample that didn't pass in Standard mode. Highly technical content with established terminology can be harder to restructure. For this type of content, Academic mode achieved 28% — a clear pass.
A Note on Transparency
We publish all results — including the samples that didn't pass. We believe honest data builds more trust than perfect-looking marketing claims.
AI detection is a cat-and-mouse game. Detectors improve, and so do humanizers. We continuously update WriteMask's rewriting engine and will republish results as our technology evolves.
For the best results, we recommend: humanize with Standard mode, check with our free detector, humanize again if needed, then add your own personal touches.
Methodology
Samples: 15 AI-generated text passages covering diverse academic and general topics (60-80 words each).
Modes tested: Standard (single pass), Standard (double pass — humanize the humanized output), and Academic mode.
Detection: WriteMask's built-in AI detector analyzing perplexity, burstiness, vocabulary patterns, and structural uniformity.
Pass threshold: Score below 50% = “Likely Human.”
Date: April 2026. Updated as we improve our humanization engine.
Test It Yourself
500 words/day free. Check your text with our detector, then humanize it. No credit card required.