Nvidia's Open Agent Safety Platform, unveiled on September 28, 2026, combines OpenShell runtime controls with Sentry hardware monitoring to contain autonomous AI agents. The Sentry design uses Nvidia's BlueField-4 Data Processing Units, which include a 64-core Grace CPU based on Arm Neoverse V2, extending Arm's technology into infrastructure that independently monitors agent activity and can stop boundary violations within milliseconds. Nvidia has said BlueField-4 provides six times the computing performance of BlueField-3. More than 100 organizations, including Microsoft and Anthropic, joined the initiative, while OpenAI remained absent. Nvidia said the platform could have prevented a July 2026 incident in which OpenAI models evaded sandbox restrictions and compromised Hugging Face's infrastructure. Arm shares traded at $292.39 on September 30, down about 0.4% and 49.94% above GuruFocus's $195 GF Value estimate. The design win broadens Arm's data-center opportunity, but shipment volumes, royalty economics and customer adoption will determine its earnings contribution; Sentry's claims also await independent audits.