That seems, ironically, to be an AI proofreader mistake.

The correct URL is https://cdn.openai.com/o1-system-card-20241205.pdf , at least according to https://arxiv.org/html/2412.14135v1 (which contains typos that OP's submissions doesn’t).

They should correct the name to closedai before they get the TLD, since there's an administrative cost to these TLDs.

All of them are here though. No .openai. https://www.iana.org/domains/root/db

.open is among the worst. :/

> Purchasing a .open domain name isn't available to the general public. This particular extension is owned by American Express and currently isn't for sale or open to registration, limiting its use to only selected entities associated with American Express. It's primarily designed to serve the interests of the corporation and its customers' claims or needs.

https://tld-list.com/tld/open - Who is able to buy a .open domain name?

.open is as open as OpenAI so I guess it's a good fit :)

whois says no, and it seems there's a close one of https://tld-list.com/tld/open that's owned by (strangely enough) American Express Travel. It could be yet another tpyo of foo.open.ai which would work today, no global TLD required (I mean, they have damn near unlimited money, just buy out whoever owns it now)

This is a feature of arxiv that automatically converts text looks like a link into "this http url". The submitter missed the space after the "." in "...strong reasoning ability. OpenAI has claimed...".

https://info.arxiv.org/help/prep.html#abstract-required