The AWS pricing page says 10% more than OpenAI, which is probably because they’re forcing all inference through the US and data residency is at a 10% premium from the model vendors for whatever reason (because you’ll pay for it).

If they put in a global endpoint like with Claude (or OpenAI directly) then it’ll probably match the direct pricing, if the pattern holds.

(https://aws.amazon.com/bedrock/pricing/, scroll to OpenAI)

It's for people that can easily pump their AWS bill but not a new vendor.