They're reportedly already doing that, AI services will be able to publish "Extensions" that Siri will use and then those services can compete amongst themselves to power it.

But this is contingent on the same services not being able to replace Siri and being able to reserve its APIs for Apple's exclusive use, and they have a pretty tenuous grasp on that these days.

https://9to5mac.com/2026/05/05/ios-27-will-let-you-choose-be...