What probably matters to youSection of the release
What
A new environment variable lets Bedrock users choose which regional inference-profile prefix models resolve to. Accepted values are us, eu, apac, jp, au and global. It is added to the environment passthrough sets used for sandboxed and spawned processes, so child processes inherit it.
Details
An older seven-entry region list including us-gov is kept separately, used for parsing Bedrock hostnames rather than for this variable.
Setting a prefix that cannot be confirmed, or models that resolve to a different prefix, produce warnings (see below).
Two sources agreeTwo things we can check say the same as this entry.
Anthropic's release notes agreeAdded ANTHROPIC_BEDROCK_REGION_PREFIX env var for Bedrock to prefer a specific cross-region inference profile over the AWS_REGION-derived…
The name it cites is new in this buildNew in this build: ANTHROPIC_BEDROCK_REGION_PREFIX
