HumanizerEval

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September 2026 review · same 50 texts

Rephrasy vs Humbot

In the September 2026 HumanizerEval review, Rephrasy and Humbot rewrote the same 50 English texts. Rephrasy cleared all 5 detectors on 20 of them; Humbot on 0. The difference is mostly Pangram: on 23 samples Rephrasy passed it where Humbot failed, and the reverse never happened. On ZeroGPT and Winston AI the two were close to even.

Per-sample agreement

Per-sample agreement, September 2026. Counts are out of the 50 shared samples, computed at the 50% human-score threshold. Margin counts the samples only one tool passed, higher count first.
DetectorPassed more oftenMarginBoth passedNeither passed
Pangram 4.0Rephrasy23 to 0027
GPTZero 2026-09-13-baseRephrasy13 to 0316
Originality.ai turboRephrasy9 to 1346
ZeroGPT defaultTied0 to 0500
Winston AI 5.0Tied0 to 0500
All 5 detectorsRephrasy20 to 0030

Every count is computed from scores.csv at build time, not transcribed. “Neither passed” counts the texts that defeated both tools; on Pangram that was 27 of 50 here.

Quality and output discipline

Quality and output discipline, September 2026.
MeasureRephrasyHumbot
36%22%
30%0%
92%98%
60%70%
1.131.12
30
00
v4Advanced
Websiterephrasy.ai humbot.ai

On per-sample quality scores, Rephrasy scored higher on 22 samples, Humbot on 12, and the two tied on 16. Rephrasy’s output was shorter on 28 of 50 samples; mean length ratios were 1.13 and 1.12, or 13% longer than the input and 12% longer than the input respectively.

Where each one outperforms the other

Rephrasy

  • Pangram: passed 23 of 50 against 0, including 23 samples where Humbot failed, against 0 the other way.
  • GPTZero: passed 44 of 50 against 31, including 13 samples where Humbot failed, against 0 the other way.
  • Originality.ai: passed 43 of 50 against 35, including 9 samples where Humbot failed, against 1 the other way.
  • Winston AI: tied at 50 of 50 but on a higher mean human score, 98.8% to 97.4%. It passed 0 samples where Humbot failed.
  • Factual consistency: 36% against 22%.
  • Naturalness: 30% against 0%.
  • Length: shorter output on 28 of 50 samples, which matters under a word limit.

Humbot

  • Originality.ai: passed 1 sample where Rephrasy failed, even though it was detected more often overall, passing 35 to 43.
  • ZeroGPT: tied at 50 of 50 but on a higher mean human score, 96.7% to 92.7%. It passed 0 samples where Rephrasy failed.
  • Syntax integrity: 98% against 92%.
  • Stance preservation: 70% against 60%.

Rephrasy vs Humbot FAQ

Is Rephrasy better than Humbot?

In the September 2026 HumanizerEval review, Rephrasy cleared all 5 detectors on 20 of the 50 shared samples and Humbot on 0. On ZeroGPT and Winston AI the two were within 6 points of each other. Quality ran 22 samples to 12, with 16 ties.

Which humanizer is best for Pangram, Rephrasy or Humbot?

Rephrasy. In September 2026, Rephrasy passed Pangram on 23 of the 50 shared samples and Humbot on 0. On 23 samples Rephrasy passed where Humbot failed; the reverse never happened. Both failed on 27.

Which humanizer changes the text less?

Rephrasy. It scored higher on per-sample quality on 22 of 50 samples, against 12. Rephrasy’s outputs averaged 1.13× the input length and passed factual consistency on 36%; Humbot’s averaged 1.12× and passed on 22%. On stance preservation the split was 60% to 70%. Rephrasy produced the shorter output on 28 of 50 samples.

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