Gpt2-chatbot: mysterious strong model on the LMSys Chatbot Arena

https://rentry.org/GPT2 <-- I found this site with some comments

Personally I find its math abilities really high (in the ballpark of gpt4-turbo and claude opus). By math I mean like undergrad math (Calc I, intro algebra)

Management, if you see this, can you please kill this post or merge it with https://news.ycombinator.com/item?id=40201712 ?

Most speculations so far are that this is a preview of the latest model from OpenAI. But there's not much supportive evidence other than it identifies as "based on GPT-4" and seems to be at least as good.

caps or gtfo, if this bot is real why is it impossible to find?

Bad link