As an only-clauder, there's another elephant in the room. Anthropic is by no means perfect, but:

* using OpenAI supports the Altman/Thiel/Musk/Ellison/Karp/Trump billionaire Orwellian worldview and also ads

* using Grok supports a ketamine-addled open fascist sympathizer jizz-spewing 12-year-old-edginess memelord and his similarly broken worldview

* Google's models are pretty good but every single product they have ever had is ultimately either suborned or killed by the advertising division

* local models pretty much only half-exist because Jensen Huang wanted to cheat on his wife; future is unclear

One can argue for harnesses and so forth being lock-in, but the ultimate lock-in is morality and wanting to have a civilization at the end of all of this; I can't recommend either enough