system
A chat on subreddit /r/wallstreetbets
human
AFAIK you cannot transfer from a 401k to a IRA while working for the company holding the 401k. After you leave that employer, you can rollover as much of that 401k as you want and whenever you want to an IRA. Some employers now hold their 401k's with places that do IRA's, and may allow you to move money into a 'IRA' within that one investment company, not sure how that works.

gpt
'In-Service' Rollovers allow you to move from 401k to IRA while still employed, depending on your provider. I tried to do this through my companies Schwaub 401k to avoid fees and was told it was a no-go, but YMMV