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NEWS · MODELS · #1563

Claude Opus 5.5 and Sonnet 5.5 available on Amazon Bedrock in AWS GovCloud (US) with Claude Code

Anthropic’s Claude Opus 5.5 and Claude Sonnet 5.5 (alongside Claude Sonnet 5) are available via Amazon Bedrock in AWS GovCloud (US); Sonnet 5 holds FedRAMP Class D and DoD IL4/IL5 authorizations and Opus/Sonnet 5.5 hold FedRAMP Class D certification on Bedrock (users should verify current model certification status). The post outlines using Anthropic’s agentic coding tool Claude Code with Bedrock’s bedrock-runtime and bedrock-mantle endpoints, describing security features (Zero Operator Access), compliance pathways, and integrations for CI/CD and developer tooling.

KEY POINTS

  1. Anthropic’s Claude Opus 5.5 and Claude Sonnet 5.5 (alongside Claude Sonnet 5) are available via Amazon Bedrock in AWS GovCloud (US); Sonnet 5 holds FedRAMP Class D and DoD IL4/IL5 authorizations and Opus/Sonnet 5.5 hold FedRAMP Class D certification on Bedrock (users should verify current model certification status).
  2. The post outlines using Anthropic’s agentic coding tool Claude Code with Bedrock’s bedrock-runtime and bedrock-mantle endpoints, describing security features (Zero Operator Access), compliance pathways, and integrations for CI/CD and developer tooling.
  3. Enables government and regulated customers to run advanced Anthropic models and agentic coding workflows inside AWS GovCloud with Bedrock's compliance-oriented controls and security architecture.
MERIDIAN INTELLIGENCE

DECISION BRIEF

75/100
CONFIDENCE
01

WHAT CHANGED

Anthropic Claude Opus 5.5 and Claude Sonnet 5.5 are available on Amazon Bedrock in AWS GovCloud (US) and can be used with Anthropic’s agentic coding tool Claude Code via Bedrock endpoints. Separately, Claude Haiku 5.5 is available on Amazon Bedrock and via Claude Platform on AWS.

02

WHY NOW

AWS published availability in AWS GovCloud (US), bringing these Anthropic models and agentic coding workflows into a region and service surface (Amazon Bedrock) that emphasizes compliance controls, FedRAMP/DoD authorization pathways, and Bedrock security features such as Zero Operator Access. This makes on‑ramp options explicit for regulated and government workloads.

03

WHO IS AFFECTED

Directly affected: government and other regulated organizations using AWS GovCloud (US); developers and teams using Amazon Bedrock and Anthropic’s Claude Code/Claude Platform; organizations tracking model-level FedRAMP and DoD authorization status for deployments.

04

CONFIRMED

• Anthropic Claude Opus 5.5 and Claude Sonnet 5.5 are available on Amazon Bedrock in AWS GovCloud (US). • Claude Sonnet 5 holds FedRAMP Class D (formerly High) certification and DoD Impact Level 4 and 5 (IL4/IL5) authorization. • Claude Opus 5.5 and Claude Sonnet 5.5 hold FedRAMP Class D certification on Amazon Bedrock (the post advises verifying current model certification status). • Amazon Bedrock in AWS GovCloud (US) supports bedrock-runtime and bedrock-mantle endpoints powered by the Mantle inference engine and describes a Zero Operator Access (ZOA) architecture. • bedrock-runtime uses the AWS SDK (InvokeModel and Converse APIs) and supports Amazon Bedrock Guardrails, Amazon Bedrock Knowledge Bases, Agents, and invocation logging. • Anthropic’s Claude Code can be used with Amazon Bedrock endpoints to run AI-assisted development workflows. • Claude Haiku 5.5 is available on Amazon Bedrock and via Claude Platform on AWS; AWS describes Haiku 5.5 as faster/ more efficient and (~75%) lower cost than Haiku 4.5 for most tasks.

05

UNCERTAIN

• Whether Claude Haiku 5.5 availability described in Source 2004 applies specifically to AWS GovCloud (US) is not stated explicitly in the excerpts. (Missing evidence) • The excerpts do not state that Opus 5.5 or Sonnet 5.5 have DoD IL4/IL5 authorization; only Sonnet 5 is explicitly described as having DoD IL4/IL5 authorization. (Clarification required) • Exact, current model‑level certification/authorization status is mutable; the posts advise verifying current status. (Status may change) • The practical scope and technical limits of the described Zero Operator Access architecture (e.g., operator capabilities and audit mechanics) are not fully detailed in the excerpts. (Missing detail) • Specific implementation steps, performance metrics in GovCloud, and end‑to‑end compliance validation for particular regulatory programs are not provided. (Missing detail) • Any downstream operational, legal, or procurement implications beyond the blog descriptions are not addressed in the supplied excerpts. (Missing evidence)

06

WHAT TO WATCH

Concrete observable signals to monitor next (sources to check for updates): • Amazon Bedrock models compliance page and AWS GovCloud (US) documentation for current model-level FedRAMP and DoD authorization listings. (check for model certification/authorization changes) • AWS Machine Learning blog and the two posts' updates for new details or clarifications about GovCloud availability and endpoint behavior. • AWS console (Amazon Bedrock in GovCloud) model listing and Claude Platform availability in the AWS Management Console. (observable listing of models and platform features) • FedRAMP and DoD authorization registries for formal notices or changes to IL4/IL5 authorizations. • Amazon Bedrock documentation for bedrock-runtime and bedrock-mantle endpoints, Guardrails, invocation logging, and explicit ZOA descriptions. • AWS billing/console entries (usage appearing on AWS bill) and CloudTrail/CloudWatch logs when deploying Bedrock models to validate invocation logging and audit trail behavior.

GROUNDED IN AWS Machine Learning ↗AWS Machine Learning ↗

WHY IT MATTERS

Enables government and regulated customers to run advanced Anthropic models and agentic coding workflows inside AWS GovCloud with Bedrock's compliance-oriented controls and security architecture.

EVIDENCE MAP

4

Editorial claims linked to specific sources, with support, contradiction and context shown separately.

SOURCES & TIMELINE

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01
AWS MACHINE LEARNING FIRST-PARTY
Supercharge regulated workloads with Claude Code and Amazon Bedrock

Please note that the following post is intended for informational purposes only. The approach detailed below may not be suitable for all organizations or compliance programs. It is important to evaluate this potential solution against the compliance requirements of your organization and any applicable regulatory obligations you may have. The availability of Anthropic Claude Opus 5.5 and Claude Sonnet 5.5 in the AWS …

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02
AWS MACHINE LEARNING FIRST-PARTY
Introducing Claude Haiku 5.5 on AWS

Today, we’re excited to announce the availability of Claude Haiku 5.5 on Amazon Bedrock and Claude Platform on AWS . According to Anthropic, Claude Haiku 5.5 is the fastest and most efficient model in the Claude 5.5 family, built for subagents and high-volume, cost-sensitive work. It also costs around 75 percent less than Claude Haiku 4.5 for most tasks. Amazon Bedrock gives you Haiku 5.5 capabilities while keeping …

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