OpenAI Deploys AI in US Classified Networks With Multi-Layer Safety Guardrails

OpenAI

Feb 28, 2026 · Updated Apr 25, 2026

OpenAI signed a deal with the US Department of War to deploy AI in classified environments. OpenAI claims stronger guardrails than any prior classified AI agreement — retaining safety stack control, cloud-only deployment, and cleared personnel in the loop.

OpenAI reached an agreement with the US Department of War to deploy its AI in classified environments. OpenAI retains full discretion over its safety stack, deploys via cloud, and keeps cleared personnel in the loop, with contractual protections on top of US law.

The company framed this as a higher bar than existing classified AI deals: other labs reduced guardrails and relied primarily on usage policies. OpenAI also publicly stated Anthropic should not be designated as a supply chain risk — a reference to Anthropic's ongoing dispute with the DoW over contract terms.

OpenAI requested the DoW make these same terms available to all AI labs, aiming to establish a shared model for how AI should operate in classified environments.

View the full update on openai.com

OpenAI

@OpenAIFeb 28

Yesterday we reached an agreement with the Department of War for deploying advanced AI systems in classified environments, which we requested they make available to all AI companies. We think our deployment has more guardrails than any previous agreement for classified AI deployments, including Anthropic's. Here's why: https://t.co/k1Ge2MqqPr

547

View on X

Every HeadsUpAI update is written based on its original source and reviewed before it's published. Read our editorial standards →

See all AI news & updates from OpenAI →

Keep reading

OpenAI Launches Rosalind Biodefense to Arm Trusted Builders Against Biological Threats

OpenAI launched Rosalind Biodefense to provide sponsored access and support for vetted developers and government agencies building pandemic preparedness tools. This initiative shifts frontier AI from a general research tool to a restricted defensive asset, mirroring OpenAI's recent strategy of arming defenders in critical infrastructure sectors.

OpenAI Prepares Restricted Rollout of GPT-5.5-Cyber for Security Defenders

Sam AltmanMay 1

OpenAI Prepares Restricted Rollout of GPT-5.5-Cyber for Security Defenders

OpenAI is starting the rollout of GPT-5.5-Cyber, a specialized frontier model designed for defensive cybersecurity operations. Access is restricted to vetted institutions and government partners to prevent misuse while arming defenders with advanced AI tools.

The OpenAI FoundationJun 2

OpenAI Foundation Deploys 130 Million Dollars to Build Global AI Resilience

The OpenAI Foundation has launched its AI Resilience vision with an initial $130 million in grants for critical safety infrastructure. The program funds defensive tools in cybersecurity, biological security, and youth safety to manage the risks of advancing frontier models.

Anthropic Refuses DoW Demands to Remove Claude AI Safety Safeguards

AnthropicFeb 26

Anthropic Refuses DoW Demands to Remove Claude AI Safety Safeguards

Anthropic is refusing DoW demands to remove Claude safeguards on mass domestic surveillance and fully autonomous weapons. The DoW threatened to invoke the Defense Production Act and label Anthropic a 'supply chain risk' — a first for any American company.