Bedrock does not have GLM 5.2 and likely will not for quite some time. It seems like they are doing that on purpose due to pressure from Anthropic. DigitalOcean has it though.

how much does that cost

There is no markup for SOTA and Open Weight is super affordable - but most important completely private. Just try it.

GLM5.2 is not available on bedrock or gcp vertex. They aren't real options.