way too hard to get. see here: https://www.reddit.com/r/USCIS/comments/13uk5yb/o1_visa_peti...

studying here is no guarantee you'll get to stay, even if you did a phd.

That anecdote is a sample size of 1, and the OP of that thread did end up getting the visa, despite their company's partner's lawyers' "belief" that their application would be "on the weaker side."