You'll noticeTier: how much it should matter to you
3Useful: my rating, 1 to 5
1Signal: worth watching, 1 to 5
AuthArea: what it touches
ImprovementsKind: in v2.1.273,
ImprovementsSection of the release
What
When a request to a model provider fails with an authentication error (401/403), Claude Code now shows guidance tailored to which provider you're using, instead of one generic error for all of them:
Amazon Bedrock: including a new check for when a model simply isn't enabled for your account/region, with instructions to enable it in the Bedrock console
Google Vertex AI
Foundry: a new dedicated auth-failure message
Gateway: a special message for 403 errors
Why
Authentication failures have different causes and fixes depending on which backend you're connecting through, so pointing you at the right console or setting saves time compared to a one-size-fits-all error.
