Claude Sonnet 5.5 Now Available on AWS Bedrock
AWS has launched Claude Sonnet 5.5 on Amazon Bedrock and Claude Platform, offering a faster, lower‑cost model for focused coding and knowledge work.
Original source published: September 28, 2026
Amazon Web Services announced that Claude Sonnet 5.5 is now accessible through Amazon Bedrock and Claude Platform. The model is described as a smarter, more efficient version of Sonnet, optimized for well‑scoped coding and knowledge tasks while delivering lower cost per task and higher speed. It integrates with existing AWS security and monitoring tools, including IAM for access control, CloudTrail for audit logging, CloudWatch for performance metrics, and Bedrock Guardrails, with usage reflected on the AWS bill.
Developers can try Sonnet 5.5 via the Bedrock console Playground or programmatically through the Anthropic Messages API, Invoke and Converse APIs, or the AWS CLI and SDK. Required prerequisites include an active AWS account with Bedrock access, the AWS CLI, Python 3.10+, and appropriate IAM permissions.
AWS positions Sonnet 5.5 alongside Opus 5.5, suggesting Opus handles judgment‑heavy work while Sonnet executes clearly defined tasks at lower cost. The model is available today in supported Bedrock regions and through Claude Platform in North America.