Only if all you care about is developing models. I assume the rest of the business would rather just use whatever's best in class regardless of who made it, so I'm sure it's not that straightforward of a decision.
Is security no longer a concern?
When you are using a third party model, you are literally feeding it not only your current software but also all the context and work fronts under development.
This is way more than granting a third party access to your internals. This is feeding it in advance updates on all their operations in real time.