There's companies out there with mid 8, possibly low 9 figure monthly AWS bills. In that world, letting people pay through said AWS pipeline gets rid of so much red tape. Supporting Bedrock was already a big winner vs OpenAI in the race for big enterprise, and Anthropic desperately wants to find any way to be sticky, as opposed to risking companies flipping a switch and telling entire departments to switch to any future codex + GPT on Bedrock plans. The harder it is for you to migrate, the better for Anthropic.

Yes. You can pay your Anthropic bill thru AWS, and use AWS access controls to manage access to Anthropic APIs. For companies all in on AWS this lowers the friction to adopt Anthropic tools significantly.