Best AI Humanizer for ZeroGPT
ZeroGPT (zerogpt.com) is a free, browser-based AI detector popular for quick checks of suspected AI-generated content. In October 2026, ZeroGPT caught 62 of the 420 outputs from the 14 AI humanizers we tested (14.8%), the third highest catch rate of the six detectors. We only test humanized AI text, so this says nothing about how ZeroGPT treats human writing.
As of October 2026, the best AI humanizer for ZeroGPT on HumanizerBench is Phrasly, with the highest average ZeroGPT score (94.3), followed by Stealth Writer (90.7) and WriteHuman (89.5).
14 humanizers · 30 prompts each · Last tested · Methodology v1.3.0
ZeroGPT catch rate
| Month | Rate Catch rate | Caught | Outputs | Tools Humanizers | Avg score Avg human score | Rank |
|---|---|---|---|---|---|---|
| 14.8% | 62 | 420 | 14 | 76.5 | 3 of 6 | |
| 18.7% | 86 | 460 | 14 | 73.8 | 5 of 5 | |
| 19.4% | 77 | 396 | 12 | 73.2 | 5 of 5 | |
| 15.4% | 66 | 429 | 13 | 76.4 | 5 of 5 | |
| 24.1% | 94 | 390 | 13 | 64.9 | 5 of 5 |
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Caught means ZeroGPT gave a human-likelihood score below 0.50 on a 0 to 1 scale. Avg human score is the mean score on a 0 to 100 scale. Rank 1 caught the most that month.
Humanizers that pass ZeroGPT
Every AI humanizer we tested against ZeroGPT in October 2026, ordered by its average ZeroGPT score. 10 of 14 passed ZeroGPT on at least 80% of their outputs. The top three passed 30, 30 and 30 of their 30 outputs, and first place changed hands in each of the last 4 monthly updates.
| Rank Position by average ZeroGPT score this cycle. Learn more → | Humanizer | Average of ZeroGPT's human-likelihood scores on this tool's outputs, where 100 means every output was scored as human. The table is ordered by this column. Learn more → ↓ | Outputs ZeroGPT scored as human (a human-likelihood of 0.50 or higher), out of the tool's outputs it scored. Ranked by share passed. Click a count to read this tool's outputs. Learn more → | This tool's ZeroGPT score in September 2026. "New" means it was not tested that month. Learn more → | Overall score across all detectors, after penalties. Learn more → |
|---|---|---|---|---|---|
| 1 | 94.3 | 30/30 | 68.0 | 61.79 | |
| 2 | 90.7 | 30/30 | 81.1 | 65.98 | |
| 3 | 89.5 | 30/30 | 77.9 | 74.89 | |
| 4 | 83.8 | 28/30 | 80.4 | 71.18 | |
| 5 | 77.3 | 29/30 | 68.9 | 74.50 | |
| 6 | 77.3 | 27/30 | new | 61.74 | |
| 7 | 76.9 | 25/30 | new | 69.02 | |
| 8 | 75.4 | 24/30 | 75.0 | 68.24 | |
| 9 | 75.4 | 27/30 | 91.4 | 65.14 | |
| 10 | 73.9 | 29/30 | 77.9 | 62.75 | |
| 11 | 73.2 | 23/30 | 74.0 | 68.87 | |
| 12 | 71.6 | 22/30 | 76.0 | 63.53 | |
| 13 | 68.0 | 23/30 | 76.9 | 67.58 | |
| 14 | 43.7 | 11/30 | 58.0 | 61.29 |
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Gold, silver and bronze mark the top three in this month's columns, ties sharing a color; Passed is ranked by share of outputs passed.
ZeroGPT compared with GPTZero and the other detectors
In October 2026, ZeroGPT caught 14.8% of humanized outputs and GPTZero caught 36.0%. On the 420 outputs both scored this month, they gave the same verdict on 65.5%. ZeroGPT gave the same verdict as Winston AI most often (83.8% of outputs) and as Pangram least often (31.4%).
| Detector | Caught | Rate Catch rate | Avg score Avg human score | vs Sep 2026 Change since Sep 2026 | Only it Only it caught | Agrees Same verdict as ZeroGPT |
|---|---|---|---|---|---|---|
| 348 of 420 | 82.9% | 16.9 | n/a | 147 | 31.4% | |
| 151 of 420 | 36.0% | 61.3 | −11.2 | 1 | 65.5% | |
 ZeroGPT | 62 of 420 | 14.8% | 76.5 | −3.9 | 0 | |
| 58 of 420 | 13.8% | 85.9 | −19.1 | 0 | 82.4% | |
| 48 of 420 | 11.4% | 87.2 | −12.1 | 1 | 83.3% | |
| 30 of 420 | 7.1% | 91.8 | −28.3 | 1 | 83.8% |
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Change is in points of catch rate. Only it caught counts outputs no other detector caught, of the 420 all six scored.
What ZeroGPT catches
By writing type, ZeroGPT caught humanized blog posts most often (33%, 28 of 84) and news articles least often (2%, 1 of 42).
| Caught by | Blog Post | Marketing Copy | Academic Essay | Application Essay | Discussion Board | News Article |
|---|---|---|---|---|---|---|
| ZeroGPT | 33% 28/84 | 17% 14/84 | 13% 11/84 | 7% 6/84 | 5% 2/42 | 2% 1/42 |
| Other five detectors | 28% 119/420 | 32% 134/420 | 30% 125/420 | 34% 142/420 | 32% 67/210 | 23% 48/210 |
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The second row pools the other detectors' verdicts on the same outputs. Each type had 3 to 6 prompts this month.
Outputs only ZeroGPT caught
No output was caught by ZeroGPT alone in October 2026.
Of the 30 prompts, ZeroGPT caught the largest share of tools on Howto Blog · claude-sonnet-5-5 (8 of 14) and no tool on eight prompts, including Discussion Post · gpt-6-sol (0 of 14). All 30 October 2026 prompts
Questions about ZeroGPT
Is ZeroGPT accurate?
On humanized AI text, ZeroGPT has caught between 14.8% (October 2026) and 24.1% (June 2026) of outputs in the five months we have tested it. It had the lowest catch rate of the detectors we test in four of them. We only test AI-written passages after a humanizer rewrites them, so we cannot say how often ZeroGPT flags human writing by mistake.
Can ZeroGPT be bypassed?
In October 2026, 358 of the 420 humanized outputs (85.2%) passed ZeroGPT as human-written. It depended on the tool: the 14 humanizers passed it on between 37% and 100% of their outputs.
What is the best AI humanizer for ZeroGPT?
As of October 2026, the best AI humanizer for ZeroGPT on HumanizerBench is Phrasly, with the highest average ZeroGPT score (94.3), followed by Stealth Writer (90.7) and WriteHuman (89.5).
ZeroGPT or GPTZero: which catches more humanized text?
GPTZero caught more than ZeroGPT in all five months both were tested. Catch rates by month, ZeroGPT first: October 2026, 14.8% and 36.0%; September 2026, 18.7% and 47.2%; August 2026, 19.4% and 47.2%; July 2026, 15.4% and 50.6%; June 2026, 24.1% and 45.6%.
What kind of writing does ZeroGPT flag most?
Over the five months we have tested it, ZeroGPT caught humanized blog posts most often (101 of 395, 26%) and discussion board posts least often (15 of 198, 8%).
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- Data
- October 2026 evidence detector-scores.json Methodology