AWS announced that Claude Haiku 5.5, Anthropic's fastest and most efficient model in the Claude 5.5 family, is now available on Amazon Bedrock and Claude Platform on AWS.
According to Anthropic, Haiku 5.5 costs around 75% less than Claude Haiku 4.5 for most tasks and is Anthropic's most capable Haiku model yet across coding, tool use, computer use and agentic tasks. It is also the first Haiku model with effort controls, letting teams tune cost against intelligence per task rather than setting one level for an entire workload.
AWS positions the model for subagent and high-volume, cost-sensitive work: routing requests, reviewing code, classifying long documents, pulling key information from small-to-medium documents, answering questions over a knowledge base, and traditional NLP tasks like classification, summarization and text generation at production scale. It also supports agentic coding, multi-step tool use, high-resolution images, and repetitive browser and desktop automation as a computer-use subagent.
AWS describes Haiku 5.5 as designed to pair with the recently announced Claude Opus 5.5: Opus plans and handles the hardest reasoning (release debugging, security review of large pull requests, long analyses), while Haiku carries out well-defined, high-volume tasks quickly, including acting as a review subagent that checks order of operations before Opus spends tokens on deeper reasoning. Because Haiku 5.5 is fast and cost-efficient, AWS notes it can run as many parallel subagents as a workload requires.
On Bedrock, Haiku 5.5 keeps data within AWS infrastructure with regional data residency, and works with existing AWS controls including IAM, CloudTrail, CloudWatch and Bedrock Guardrails, with usage billed through AWS. Claude Platform on AWS gives direct access to Anthropic's native platform experience through the AWS Management Console, unified with AWS billing and authentication.
The model is available today on Bedrock through US, EU, AU, JP and Global CRIS inference profiles on bedrock-runtime, with GovCloud (US) support on both bedrock-runtime and bedrock-mantle endpoints. It's also available through Claude Platform on AWS in North America. AWS provides sample code for the Anthropic Messages API, the Bedrock InvokeModel and Converse APIs, and a Getting Started notebook on GitHub, with usage, performance and costs trackable through CloudWatch and AWS Cost Explorer.