Government agencies running workloads in AWS GovCloud (US) need AI capabilities that keep pace with the commercial sector. At the same time, they can’t compromise the security and compliance controls their missions require. As open-weight foundation models (FMs) move from experimentation into mission systems, two requirements shape every model decision. First, the model must deliver the capability the mission demands. Second, the inference environment must satisfy the agency’s security, compliance, and data residency obligations. For U.S. government agencies, the defense and intelligence community and the contractors that serve them, these requirements are non-negotiable. Access to advanced open-weight models is essential for work such as intelligence analysis, mission planning, acquisition and contract document review, security log analysis, and compliance automation. This access must not require moving sensitive data outside the boundary that governs it.

We’re excited to introduce US-based frontier open-weight models in AWS GovCloud (US). With this release, Amazon Bedrock now supports OpenAI’s open-weight GPT OSS models (120B and 20B) and NVIDIA Nemotron (Nano 9B v2, Nano 12B v2, Nano 30B, Super 120B) models. With these new models, you can build and scale generative AI applications with diverse, high-performance FMs. This offers the flexibility to use OpenAI’s and NVIDIA’s latest models alongside other leading AI models through a single, unified API. You can use this unified API to select the right model for each specific use case without changing your application code.

AWS GovCloud (US) provides an isolated set of AWS Regions designed to host sensitive data and regulated workloads. Regions are physically located in the United States and administered exclusively by U.S. citizens. They help customers meet compliance frameworks including FedRAMP High (Provisional Authority to Operate) and DoD Cloud Computing Security Requirements Guide (SRG) Impact Levels 2, 4, and 5. Additional frameworks include International Traffic in Arms Regulations (ITAR) and Criminal Justice Information Services (CJIS).

Amazon Bedrock is a fully managed service for accessing FMs from independent model providers, with inference running entirely on AWS-operated infrastructure.

With Amazon Bedrock, inference runs inside the AWS GovCloud (US) isolation boundary, on infrastructure operated by U.S. citizens on U.S. soil. For details on how Amazon Bedrock handles your data, refer to Data protection in Amazon Bedrock.

OpenAI’s open-weight GPT OSS models and NVIDIA Nemotron open-weight models are now available on Amazon Bedrock in AWS GovCloud (US). This launch delivers two open-weight model families into the AWS GovCloud (US) Regions: OpenAI gpt-oss-120b and gpt-oss-20b, and the NVIDIA Nemotron 3 family, including Nemotron 3 Super 120B alongside the Nemotron 3 Nano models. With these models, you can build agentic applications and mission workflows such as automated security control assessments, multi-document intelligence synthesis, contract and acquisition analysis, and policy compliance checking. All of this runs within the AWS GovCloud (US) compliance boundary.