HumanizerEval

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September 2026 review · same 50 texts

RewriteAI vs Ryne

In the September 2026 HumanizerEval review, RewriteAI and Ryne rewrote the same 50 English texts. RewriteAI cleared all 5 detectors on 13 of them; Ryne on 0. The difference is mostly Originality.ai: on 44 samples RewriteAI passed it where Ryne failed, and the reverse never happened. On Pangram 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 4.0RewriteAI9 to 6530
GPTZero 2026-09-13-baseRewriteAI39 to 047
Originality.ai turboRewriteAI44 to 006
ZeroGPT defaultRewriteAI13 to 0316
Winston AI 5.0RewriteAI35 to 0132
All 5 detectorsRewriteAI13 to 0037

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 30 of 50 here.

Quality and output discipline

Quality and output discipline, September 2026.
MeasureRewriteAIRyne
54%44%
40%80%
100%98%
94%94%
1.091.07
20
00
API default, passages of up to 280 words (300-word API limit)Aggressive, beast mode
Websiterewriteai.com ryne.ai

On per-sample quality scores, RewriteAI scored higher on 12 samples, Ryne on 21, and the two tied on 17. Ryne’s output was shorter on 26 of 50 samples; mean length ratios were 1.09 and 1.07, or 9% longer than the input and 7% longer than the input respectively.

Where each one outperforms the other

RewriteAI

  • Pangram: passed 14 of 50 against 11, including 9 samples where Ryne failed, against 6 the other way.
  • GPTZero: passed 43 of 50 against 4, including 39 samples where Ryne failed, against 0 the other way.
  • Originality.ai: passed 44 of 50 against 0, including 44 samples where Ryne failed, against 0 the other way.
  • ZeroGPT: passed 44 of 50 against 31, including 13 samples where Ryne failed, against 0 the other way.
  • Winston AI: passed 48 of 50 against 13, including 35 samples where Ryne failed, against 0 the other way.
  • Factual consistency: 54% against 44%.
  • Syntax integrity: 100% against 98%.

Ryne

  • Pangram: passed 6 samples where RewriteAI failed, even though it was detected more often overall, passing 11 to 14.
  • Naturalness: 80% against 40%.
  • Length: shorter output on 26 of 50 samples, which matters under a word limit.

RewriteAI vs Ryne FAQ

Is RewriteAI better than Ryne?

In the September 2026 HumanizerEval review, RewriteAI cleared all 5 detectors on 13 of the 50 shared samples and Ryne on 0. On Pangram the two were within 6 points of each other. Quality ran 12 samples to 21, with 17 ties.

Which humanizer is best for Pangram, RewriteAI or Ryne?

RewriteAI. In September 2026, RewriteAI passed Pangram on 14 of the 50 shared samples and Ryne on 11. On 9 samples RewriteAI passed where Ryne failed; the reverse happened on 6. Both failed on 30.

Which humanizer changes the text less?

Ryne. It scored higher on per-sample quality on 21 of 50 samples, against 12. RewriteAI’s outputs averaged 1.09× the input length and passed factual consistency on 54%; Ryne’s averaged 1.07× and passed on 44%. On stance preservation the split was 94% to 94%. Ryne produced the shorter output on 26 of 50 samples.

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