Their models suck, if they didn’t they’d sell them.

Edit to add: they’re selling access to their GPUs, that’s how bad and under used their models are. Again, if their own models were any good, someone would use them.

They have their own models, it depends on a teams manager and a few other constraints if they are required to use them or if they are pestered to use generative models at all.

I'm betting that cost is just the cost for the token usage and nothing else.

Meta is not using their own models internally because their internal models are far behind the state of the art.

This is why Zuck is in a frenzy too, trying desperately to catch up, failing consistently to actually do so