Is this going to be the cope every time this happens?

I don't think a single person reading or upvoting had ever heard of this extremely obscure cipher until this post hit the front page, it's not "cope" to use basic critical thinking to ask questions like "was this cipher well known" and "were there many attempts to solve it before now"... that's pretty much Information Literacy 101.

I think the point is that rather than YOU finding out the answers to those questions, and post only if the answers were indicative of some "gotcha", someone ALWAYS posts something similar to your OP as a lazy/low-effort way to discredit LLMs.

[dead]

Haha - I'm just seriously wondering, how can anyone tell at this point?

Right, with the amount of data these models are trained on, somewhere someone may have solved it and it was in some obscure text/page no one looked at or care about. We'll probably never know.

It's like Google without Ad/SEO incentives. All it took was trillions of dollars of investment.