{"version":"2.1.321","anchor":"bedrock-model-id-normalization","canonical_anchor":"bedrock-model-id-normalization","heading":"Claude Code strips Amazon Bedrock prefixes from model IDs before matching them","tier":"notice","area":"Cloud Providers","scope":"org","heads_up":false,"url":"https:\/\/changelogs.core-directive.com\/v\/2.1.321\/e\/bedrock-model-id-normalization","release_url":"https:\/\/changelogs.core-directive.com\/v\/2.1.321","markdown":"### Claude Code strips Amazon Bedrock prefixes from model IDs before matching them\n\nClaude Code now removes Bedrock ARN, region and anthropic. prefixes from a model ID before checking which model it is\n\n**Unclear.** It is not clear whether Bedrock model IDs that were not recognised before are recognised now.\n\n**What**\n\nAmazon Bedrock is Amazon's service for running Claude. It often names models with long identifiers, such as an ARN (Amazon Resource Name). Claude Code's check that works out which model a name refers to now strips these before matching:\n\n- Bedrock ARN prefixes for `foundation-model` and `inference-profile`\n\n- the `anthropic.` prefix\n\n- an optional region prefix in front of it\n\n**Why**\n\nBedrock ARNs and inference-profile IDs may now be recognised as Claude models.\n\n- Area: Cloud Providers\n- Tier: You'll notice\n- Useful: 2\/5\n- Signal: 1\/5\n- Scope: org\n- Heads-up: no"}