Source: platform.claude.com release notes — May 11, 2026.

Claude Platform on AWS — launched. The full Anthropic API surface is now available through Anthropic-managed infrastructure on AWS, with AWS billing and IAM authentication. That includes the Messages API, Files API, Message Batches API, Claude Managed Agents, Agent Skills, code execution, and tool use — all reachable through native AWS endpoints.

How it differs from Bedrock. The Bedrock Messages endpoint (launched April 16) is a Messages-only surface at /anthropic/v1/messages. Claude Platform on AWS is the full platform — same shape as the first-party Anthropic API, just with AWS billing and IAM-based auth.

Who it's for. AWS-first organizations that previously had to pick between the rich first-party API (separate billing, separate API-key management) and the Bedrock subset (clean AWS integration, narrower surface). This collapses that trade-off. If you're on GCP, Azure, or on-prem, nothing changes — keep using the Anthropic API directly, or Vertex AI, or Foundry.

Docs: Claude Platform on AWS.