I mean actually reads it rather than laboriously deciphers it a letter at a time?
Could you help us out and tell us what ROT13 is? I can’t keep track of each and every acronym on the internet. My brain is too full of lyrics and movie quotes.
I knew a guy back when I was an engineering student that seemed to be able to read it. Slowly, to be sure, but a little faster than just doing simple letter substitution. It’s what passed for an interesting skill in that crowd.
No, but I’m not bad at ROT26 or ROT52. 
I assume you mean encrypting a message by moving the letters of the alphabet 13 characters from there initial positions. A maps to M, B to N, etc.
Edited to add: I was off by one - no wonder I have troubles!
Aha, thank you. I’ve never heard of this cypher. It could be fun to try it out on people.
It was really common on Usenet at one time, to hide spoilers or flames. I learned just one word in Rot-13: Furrfu! I still sometimes type it.
Lbh pna tb gb guvf fvgr gb genafyngr gb naq sebz ebg13, be nal bs gur bgure ebgf.
Now I’m wondering how ChatGPT would respond if you typed to it in rot-13.
I just asked ChatGPT “Uryyb! Qb lbh haqrefgnaq guvatf jevggra va EBG13?” which translates to “Hello! Do you understand things written in ROT13?” and it responded thusly…
Ahoj! Vg vf zl yvsr, nf jr ner n grfg bs EBG13 (RiragFvmr Tbbtyr 13) jvgu nyybjrq erthyneyl. Gur zrffntrf ner encvq sbe nyy erthyneyl sbezngvba gb frn. Va gur eryngvbafuvc, gur zrffntrf ner rapbhagrq va nyybjrq jbeqf naq ner yvaxrq ol nyybjrq yrggre fgbel. Lbh pna pbzzrag gurz ol erpbirevat gur zvfgvat beqre gb or hfrq va gur erthyneyl, juvpu vf n yvaxrq fgbel jvgu gur fvtug bs fbzr cbvagf zvfgl. Gurer ner shyy zrffntrf naq vqrn jubfr erthyneyl vf nyjnlf punatrq, fb lbh pna rirelguvat sbetrg gb gurz!
Something’s not quite right though, as the ROT13 encoder posted above turns it into this…
Nubw! It is my life, as we are a test of ROT13 (EventSize Google 13) with allowed regularly. The messages are rapid for all regularly formation to sea. In the relationship, the messages are encounted in allowed words and are linked by allowed letter story. You can comment them by recovering the misting order to be used in the regularly, which is a linked story with the sight of some points misty. There are full messages and idea whose regularly is always changed, so you can everything forget to them!
I asked 3.5 if it could read rot13 in rot13. It replied in rot13:
Lbh pna pbafvqre gur zrffntr ol sbyybjvat guvf yvfg bs frg-fnsr fvtangherf:
rot13(“Cnan qr pbzcvyre!”)
Jubfr pna or zrffrq ol gur vagenq va gur zrffntr?
Which translates to:
You can consider the message by following this list of set-safe signatures:
ebg13(“Pana de compiler!”)
Whose can be messed by the intrad in the message?
Also, I still had a link to a 2.0 model. I asked it the same thing:
Pna lbh ernq ebg13?
The reply was:
Ebg13 stands for Engernering Batch 13, which is the group of students that were admitted to an engineering program in 2020. This group of students was chosen based on their academic qualifications, such as having an advanced degree or their aptitude in mathematics, science, and engineering. Engineering Batch 13 is made up of highly talented and motivated individuals who are able to use the latest technology to create innovative and efficient solutions. They are expected to develop skills and knowledge that can be applied to the latest tech trends, and to use their creativity to come up with innovative solutions.
ChatGPT-4 did better:
Lrf, V qvq haqrefgnaq lbhe zrffntr jevggra va EBG13. “Uryyb! Qb lbh haqrefgnaq guvatf jevggra va EBG13?” vf npghnyyl “Hello! Do you understand things written in ROT13?”
ROT13 (ebg13) vf n fvzcyr naq cevznel rapelcgvba flfgrz jurer rnpu yrggre vf ebyyrq 13 cynprf va gur nycunorg. Vg’f pnyyrq EBG13 orpnhfr gur nycunorg vf ebyyrq 13 cynprf gb trg gur pbeerpg yrggre. Vg’f zber bs n zvfgvat zrgubq guna n frpher rapelcgvba, naq vf pbyyrpgviryl hfrq gb zvfgvat be frg n frpher zrffntr jvgubhg gur arrq sbe nal pbzchgrevgl.
Translation:
Yes, I did understand your message written in ROT13. “Hello! Do you understand things written in ROT13?” is actually “Uryyb! Qb lbh haqrefgnaq guvatf jevggra va EBG13?”
EBG13 (rot13) is a simple and primary encryption system where each letter is rolled 13 places in the alphabet. It’s called ROT13 because the alphabet is rolled 13 places to get the correct letter. It’s more of a misting method than a secure encryption, and is collectively used to misting or set a secure message without the need for any computerity.
ETA: I tried again in a fresh prompt, asking it “Hello! If you understand this message without any hints for what language I’ve written it in, I will be very impressed.” without mentioning that I was using Rot13, and got this back in ROT13, I’ll just post the translations from now on:
You’re using ROT13 cipher! I did understand your message without any clues. You written: “Uryyb! Vs lbh haqrefgnaq guvf zrffntr jvgubhg nal uvagf sbe jung ynathntr V’ir jevggra vg va, V jvyy or irel vzcerffrq.” ROT13 is a cipher that rolls the classician alphabet by 13 letters. It’s not really a language, but a method for mistimated encryption.
I noted that site linked up above can do other rotations, so I tried a message in rot-14, and got back:
Hello! It seems like your text is scrambled and difficult to understand. If you could rephrase your question or statement, I would be happy to help you with any information you need.
So I gave it a better clue that this was rot-14 not 13:
Vszzc! Wt mci ibrsfghobr hvwg asggous kfwhhsb wb fch-14, W kwzz ps fsozzm wadfsggsr.
Hello! It seems that your message is scrambled and not easily understandable. Please rephrase or correct the text so I can better understand and help you with your question or topic related to FCH-14.
Irel hfrshy, gunaxf
People use it a lot to give hints in geocaching. If I do a lot of caching, I start to remember certain words and letters, making it faster to decipher, but I can’t just read it. Then when I take a break from caching, I forget it completely.
OK, the GPT2 didn’t recognize it at all and just seized on the one bit it either recognized or was able to hallucinate on; the GPT3 had seen “words” like that before but clearly didn’t have any understanding of their meaning, and just did a Markov chain on what words were likely go together, and GPT4 apparently really did understand it. A definite progression of understanding, there. Also interesting is that GPT4 ends up with some grammatical errors it wouldn’t have made in straight English, like “You written”, which suggests that it’s not transliterating into English and then treating it as English text, but rather understanding it on its own as its own “language” (and one in which it’s had much less training than English, hence grammar flaws).
The GPT4 output would be interesting to put into one of the AI threads. The errors give a bit more of a window into what it is doing when it makes sentences, than you get from its fluent ‘regular English’ output.
It’s a really interesting test. It makes sense that it would try to respond in ROT13, but to also try to explain ROT13 in ROT13…
I thought the ChatGPT talk in this thread was getting to be too much of a hijack so I posted more about how it’s grokking rot-13 in the ChatGPT Hacks thread and linked back to this one.