AWS has made Anthropic’s Claude Haiku 5.5 available through Amazon Bedrock and Claude Platform on AWS, giving AWS customers a lower-cost model option for high-volume AI workloads under existing AWS billing, authentication and infrastructure controls. Anthropic says Haiku 5.5 is its fastest and most efficient Claude 5.5-family model and costs about 75% less than Claude Haiku 4.5 for most tasks.
On Bedrock, the model operates within AWS infrastructure with regional data residency and can be used with IAM access controls, CloudTrail auditing, CloudWatch monitoring and Bedrock Guardrails. Claude Platform on AWS, meanwhile, provides Anthropic’s native platform experience through the AWS Management Console while retaining AWS billing and authentication.
What Haiku 5.5 is intended for
According to Anthropic, Haiku 5.5 is its most capable Haiku model for coding, tool use, computer use and agentic work. It is also the first Haiku model with effort controls, which let developers adjust the cost-versus-intelligence trade-off by task rather than applying one setting across a workload.
AWS positions the model for repeatable jobs that can be distributed across many subagents: routing requests, code review, document classification, summarization, rewriting and targeted changes across multiple files. The company also says it supports multi-step tool use, high-resolution images and repetitive browser or desktop tasks. Those are vendor capability claims, rather than independently reported benchmark results.
A division of labor with Opus 5.5
AWS describes Haiku 5.5 as the execution layer alongside Claude Opus 5.5. In that proposed arrangement, Opus handles planning and difficult judgment calls—including release debugging, security review of large pull requests and longer analyses—while Haiku carries out well-defined, high-volume tasks. The potential practical benefit is that teams can reserve the more demanding model for work requiring deeper reasoning and use Haiku subagents in parallel for routine steps.
How developers can use it
Developers can test the model in the Bedrock console’s Playground or call it on the bedrock-runtime endpoint through the Anthropic Messages API, Bedrock Invoke API or Converse API. AWS’s examples use the model identifier global.anthropic.claude-haiku-5-5. Programmatic use requires an AWS account with Bedrock access and IAM permissions to invoke models; AWS’s Python examples also list Python 3.10 or later, Boto3, the Anthropic SDK and the Bedrock token generator.
The published InvokeModel example notes that Haiku 5.5 may return a thinking block before a text block, so applications should select output by block type rather than assuming a fixed position. AWS also points developers to CloudWatch and Cost Explorer for monitoring usage, performance and spending.
Availability
Claude Haiku 5.5 is available on Amazon Bedrock via US, EU, AU, JP and Global geo-based inference profiles on bedrock-runtime. In AWS GovCloud (US), AWS says it is available on both bedrock-runtime and bedrock-mantle. It is also available through Claude Platform on AWS in North America.
Source: AWS Machine Learning Blog.
Definition. Claude Haiku 5.5 is Anthropic’s fast, efficient Claude 5.5-family model, now available through AWS services for high-volume workloads.
| Model | AWS-described role |
|---|---|
| Claude Opus 5.5 | Planning, difficult judgment calls, release debugging, security review of large pull requests and longer analyses. |
| Claude Haiku 5.5 | Well-defined, high-volume execution tasks that can run across subagents in parallel. |
Key takeaways
- Claude Haiku 5.5 is available through Amazon Bedrock and Claude Platform on AWS.
- AWS positions the model for repeatable, high-volume subagent tasks such as routing, classification, summarization and code review.
- Effort controls let developers adjust the cost-versus-intelligence trade-off by task.
- On Bedrock, the model can use AWS controls including IAM, CloudTrail, CloudWatch and Bedrock Guardrails.
- AWS describes Haiku as an execution layer for defined tasks alongside Claude Opus 5.5 for planning and harder judgment calls.
FAQ
Where is Claude Haiku 5.5 available on AWS?
It is available through Amazon Bedrock via US, EU, AU, JP and Global geo-based inference profiles, as well as through Claude Platform on AWS in North America.
What workloads does AWS position Claude Haiku 5.5 for?
AWS positions it for repeatable, high-volume work distributed across subagents, including routing, code review, document classification, summarization, rewriting and targeted changes across files.
How can developers call Claude Haiku 5.5 on Bedrock?
Developers can use the Bedrock Playground or call the bedrock-runtime endpoint through the Anthropic Messages API, Bedrock Invoke API or Converse API.
What model identifier does AWS use for Claude Haiku 5.5?
AWS examples use global.anthropic.claude-haiku-5-5.
