AI Humanizer Benchmark

SuperHumanizer

AI humanizer · superhumanizer.ai

In the October 2026 cycle, SuperHumanizer placed #6 of 11 with an overall score of 78.23/100. AI Humanizer Benchmark tests SuperHumanizer independently. The overall score weights bypass rate at 42%, meaning preservation at 32%, readability at 16% and consistency across categories at 10%, then subtracts any penalties.

78.23/100
overall score
83.9%
bypass rate
33/33
tests completed
1.10×
avg. length vs. input
Last tested
Sample size
33
Methodology
v1.1.0

Detector bypass rates

Average human-likelihood each detector gave this tool's outputs, shown as a percentage.

Originality.ai
88.2
Grammarly
83.5
ZeroGPT
83.5
QuillBot
81.3
Winston AI
68.8
Copyleaks
63.6
GPTZero
47.6

Performance by category

The overall-score formula applied within each category, before penalties.

Academic essayApplication essayBlog postBusiness emailMarketing copyDiscussion boardNews article

Output quality

Meaning preservation is the rescaled embedding cosine similarity between input and output. Readability is a language model's rating of clarity, fluency and naturalness. Consistency shows how evenly bypass results hold across writing categories. The published data lists each value for every test.

Meaning
75.2/100
#4 of 11 · field avg 70.6
Readability
71.0/100
#10 of 11 · field avg 75.5
Consistency
85.6/100
#8 of 11 · field avg 89.6

Penalties

  • Meaning drift × 1−1.0
  • Total−1.0 pts
Meaning drift · 1 testShow tests

The meaning similarity between input and output fell below 0.85. The rewrite no longer says what the input said.

  • Argumentative essay Academic essay
    Similarity 0.825 < 0.85
    Show input and output
    Input · 232 words
    The notion that community libraries are obsolete in the digital era is a shortsighted one, failing to recognize their evolving and indispensable role. While digital resources offer unparalleled access to information, libraries are transforming into vital community hubs, bridging the digital divide and fostering intellectual growth in ways that technology alone cannot. Far from being mere repositories of physical books, modern libraries are crucial access points for the digitally disadvantaged. They provide free internet, computer access, and crucial digital literacy training, ensuring equitable participation in an increasingly online world. Without libraries, countless individuals would be cut off from essential services, employment opportunities, and educational resources. Moreover, libraries cultivate a sense of community and provide essential physical spaces that digital platforms cannot replicate. They host workshops, book clubs, and cultural events, fostering social interaction and intellectual discourse. In an age often characterized by digital isolation, libraries offer a tangible place for connection, learning, and shared experience. They curate reliable information, offer expert guidance, and create environments conducive to focused study, contrasting with the often overwhelming and unverified information found online. Therefore, community libraries are not relics; they are dynamic institutions adapting to the digital age. They are essential for digital inclusion, community building, and providing a trusted, curated space for knowledge and connection that complements, rather than competes with, the digital landscape. Their continued support is paramount for a well-informed and connected society.
    Output · 227 words
    Digital be damned! Just because your company has an E-Reader, doesn't mean the library has become superfluous, outdated, or obsolete. Society's most respected institutions are in the process of evolving and they play an even more vital role today than ever before.34 A BIBLI KETTLE (hello, hybrid!) ## STORE 21. You dunno…Maybe,. ## … Beyond storing books, contemporary libraries are gateways to opportunity for those who lack digital access. They offer free internet and computers as well as digital skills training that is fundamental to navigating a more connected world. For many, computers and internet access at libraries are their only means to education and access to various services. Furthermore, libraries build community and provide physical spaces that cannot be constructed online. They create opportunities for social interaction and enrichment through programs like lecture series, book clubs, and community events. In an age of digital detachment, libraries serve as a real-world venue for exchange of ideas, a source of curated and trustworthy knowledge, and a sanctuary for concentration and solitary research. Thus community libraries are not dead but thriving entities that are changing to meet the challenges of a digital world. They are crucial to digital inclusion, community cohesion and enable people and communities to have a trusted space for information and relationships that sits alongside the digital without competing with it. We need to preserve them.
    Detector scores for this run

These points come off the overall score. How penalties work

Evidence: every SuperHumanizer run

Each row is one October 2026 prompt that SuperHumanizer rewrote, with a dot for each of the 7 detectors. Green means the detector judged the rewrite human. Red means it scored the rewrite as AI. An empty circle means no score came back.

Download all 33 rows (.jsonl)

7 of 33 outputs passed all 7 detectors. The other 26 got an AI verdict from at least one detector or are missing a score.

#PromptInput modelGPTZeroWinston AIOriginality.aiZeroGPTGrammarlyQuillBotCopyleaksMedian
01Argumentative essayAcademic essayGemini 2.5 Flash0.81
02Lit reviewAcademic essayClaude Sonnet 51.00
03Cover letterApplication essayGPT-5.6 Luna0.77
04Personal statementApplication essayGemini 3.5 Flash1.00
05How-to blogBlog postClaude Haiku 4.50.48
06Listicle blogBlog postGPT-5.6 Terra0.95
07Business emailBusiness emailGemini 2.5 Flash0.79
08Landing copyMarketing copyClaude Sonnet 50.84
09Product descriptionMarketing copyGPT-5.6 Luna1.00
10Discussion postDiscussion boardGemini 3.5 Flash1.00
11News articleNews articleClaude Haiku 4.50.88
12Argumentative essayAcademic essayGPT-5.6 Terra1.00
13Lit reviewAcademic essayGemini 2.5 Flash1.00
14Cover letterApplication essayClaude Sonnet 50.21
15Personal statementApplication essayGPT-5.6 Luna1.00
16How-to blogBlog postGemini 3.5 Flash0.99
17Listicle blogBlog postClaude Haiku 4.50.73
18Business emailBusiness emailGPT-5.6 Terra0.34
19Landing copyMarketing copyGemini 2.5 Flash1.00
20Product descriptionMarketing copyClaude Sonnet 50.73
21Discussion postDiscussion boardGPT-5.6 Luna0.83
22News articleNews articleGemini 3.5 Flash1.00
23Argumentative essayAcademic essayClaude Haiku 4.50.92
24Lit reviewAcademic essayGPT-5.6 Terra1.00
25Cover letterApplication essayGemini 2.5 Flash0.57
26Personal statementApplication essayClaude Sonnet 51.00
27How-to blogBlog postGPT-5.6 Luna0.89
28Listicle blogBlog postGemini 3.5 Flash0.65
29Business emailBusiness emailClaude Haiku 4.50.47
30Landing copyMarketing copyGPT-5.6 Terra0.86
31Product descriptionMarketing copyGemini 2.5 Flash1.00
32Discussion postDiscussion boardClaude Sonnet 51.00
33News articleNews articleGPT-5.6 Luna1.00
Detector rate (mean human-likelihood)47.6hardest68.888.283.583.581.363.6
Runs passed15/3322/3329/3331/3331/3327/3321/33

Each detector's result is converted to a human-likelihood score between 0 and 1. A score of 0 means the detector is sure the text is AI. A score of 1 means it is sure the text is human. Dots are green at 0.50 or above and red below. Hover a dot to see its exact score. The 0.50 cut-off only sets the dot colors. A tool's bypass rate on the leaderboard takes the median of the 7 detector scores for each test, then averages those medians. That gives a continuous number, so it will not match the share of green dots. The same goes for each per-detector rate. It is the average of that detector's scores (the number detector pages rank by), not a count of green dots.

Score history

Overall score in every published cycle that included this tool.

255075100

Access

Starting price
$12.00/mo
Free tier
Yes
Public API
Yes (required for inclusion)

Lowest paid plan at the monthly rate, without any annual discount. Price does not affect the score.

How we tested

The tool rewrote 33 texts from 7 writing categories on its default settings. Then 7 independent AI detectors scored each output. Anyone can recompute every score from the published data.

Raw test data

Every input text from the October 2026 cycle, with this tool's rewrite, the settings used and each detector's score.

SuperHumanizer
33 rows · .jsonl

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