September 2026 review
AI detectors in the panel
Human scores are vendor-specific and are never averaged across detectors, so each one gets its own ranking. In September 2026 the average tool passed Pangram on 32% of the same 50 texts and ZeroGPT on 95%. Picking a humanizer without knowing which detector you face is guessing.
Tested in this review
| Detector | Version tested | Best humanizer | Best | Worst | Spread |
|---|---|---|---|---|---|
| Pangram | 4.0 | StealthGPT Super | 92% | 0% | 92 |
| GPTZero | 2026-09-13-base | StealthGPT Super and WriteHuman (tied) | 100% | 8% | 92 |
| Originality.ai | turbo | StealthGPT Super, WriteHuman and Grubby (tied) | 98% | 0% | 98 |
| ZeroGPT | default | StealthGPT Super and 7 others (tied) | 100% | 62% | 38 |
| Winston AI | 5.0 | StealthGPT Super and 7 others (tied) | 100% | 26% | 74 |
Spread is the gap in percentage points between the best and worst tool on that detector.
Best AI humanizer for Pangram
The hardest detector in the panel.
In September 2026, StealthGPT Super led at 92%.
Best AI humanizer for GPTZero
The most widely used detector in education.
In September 2026, StealthGPT Super and WriteHuman tied at the top.
Best AI humanizer for Originality.ai
The detector publishers and SEO teams use.
In September 2026, StealthGPT Super, WriteHuman and Grubby tied at 98%.
Best AI humanizer for ZeroGPT
The easiest detector in the panel to pass.
In September 2026, StealthGPT Super and 7 others tied at the top.
Best AI humanizer for Winston AI
A detectorused mainly by educators and editors.
In September 2026, StealthGPT Super and 7 others tied at the top.