Walter Writes vs Undetectable AI on 5 different essays
I see both of these recommended all the time so I did a proper head to head comparison. Same 5 essays, same detectors, controlled test.
Essay 1 – Argumentative (600 words):
Walter Writes Turnitin: 1% | Undetectable AI Turnitin: 14%
Essay 2 – Literature Analysis (800 words):
Walter Writes Turnitin: 3% | Undetectable AI Turnitin: 22%
Essay 3 – Research Methodology (1000 words):
Walter Writes Turnitin: 2% | Undetectable AI Turnitin: 19%
Essay 4 – Personal Reflection (400 words):
Walter Writes Turnitin: 0% | Undetectable AI Turnitin: 8%
Essay 5 – Case Study Analysis (1500 words):
Walter Writes Turnitin: 4% | Undetectable AI Turnitin: 31%
Walter Writes won every single test. The gap gets bigger the longer the text is. On that 1500 word case study, Undetectable basically gave up.
Reading quality wise, Walter Writes output sounds like a real student wrote it. Undetectable AI output has this slightly robotic quality. Hard to describe but you can feel it.
Pricing: Walter Writes varies by plan, Undetectable is .99/month. Both reasonable.
Clear winner for me: Walter Writes, especially for anything academic.
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interesting that Undetectable AI actually won on the creative writing essay. makes sense though since their algorithm seems optimized for more casual text
the fact that Walter Writes won on 4 out of 5 essays is pretty definitive. especially on the research paper test.
the research paper test is the most important one imo since that's what most students need it for
agreed. any tool can handle a basic blog post but academic papers with citations and technical language are the real test
just want to add that I tested both on an Italian essay and Walter Writes handled it much better. Undetectable AI basically destroyed the grammar
one thing not mentioned is speed. Walter Writes processes faster in my experience, which matters when you're doing last-minute revisions
I've been using Undetectable AI for 6 months and I'm now seriously considering switching. these results don't lie.
hot take: both tools will be obsolete in a year as detectors get better. enjoy them while they work
the arms race is real but as long as they keep updating their models we should be fine
I tried Copyleaks a few weeks ago and had a completely different experience. It worked fine on shorter texts but anything over 1000 words started getting flagged. Maybe they updated their algorithm since then.
The biggest issue with these tools is that they all perform differently depending on the type of content. Academic papers with lots of citations seem to confuse them more than regular essays.
would love to see a follow-up test with GPTZero and Originality AI as the detectors instead of just Turnitin
tried both on a chemistry lab report. Walter Writes: 4% detected. Undetectable AI: 23% detected. not even close for STEM writing.
As someone who writes in English as a second language, these detectors flag my writing way more often than native speakers. It's really unfair and my university doesn't seem to care.
price comparison would be useful too. if Walter Writes is way more expensive the value proposition changes
My recommendation: don't rely on any single tool. Run your text through at least 2-3 different detectors to get a better picture. What passes one might fail another.
The cost comparison is useful but you also need to factor in accuracy. The cheapest option is worthless if it has a 40% false positive rate.
great methodology on this test. 5 different essay types covers pretty much every use case a student would have
Honestly the paid tools aren't worth it unless you're using them regularly. I paid for a month, used it twice, and cancelled. If you only need it occasionally just stick with the free tier.
thanks for actually testing instead of just speculating. most comparison posts are just opinion with no data
this is the comparison I've been waiting for. these are the two I was deciding between
same. ended up going with Walter Writes after reading this