AWS actually hosts the models. Security & isolation is part of the proposed value proposition for people and organizations that need to care about that sort of stuff.

It also allows for consolidated billing, more control over usage, being able to switch between providers and models easily, and more.

I typically don’t use Bedrock, but when I have it’s been fine. You can even use Claude Code with a Bedrock API key if you prefer

https://docs.aws.amazon.com/bedrock/latest/userguide/what-is...

https://code.claude.com/docs/en/amazon-bedrock

(I am not affiliated with AWS in any way. I’m just a user stuck in their ecosystem!)