Over 100 companies and organizations, including OpenAI, Anthropic, AWS, Google, Microsoft and Oracle, have signed a call for a global surge in cyber defense. The letter warns that AI-enabled attacks will become more widespread and sophisticated in the coming months, placing hospitals, water treatment plants and internet infrastructure at particular risk. It asks every organization to treat cyber defense as an immediate leadership priority, urges security vendors to test continuously against frontier capabilities, and calls on governments to fund essential services that lack staff or budget. Frontier AI companies are asked to provide responsible model access, training, funding and practical support.

The coalition turns a technical emergency into a question of public dependence. Institutions responsible for everyday life often run old software on tight budgets, while the most capable defensive models, threat intelligence and testing expertise remain concentrated in firms that set the terms of access. A hospital or municipal utility may therefore need private permission to protect a public obligation. Sharing verified fixes can reduce that imbalance, but it also gives AI laboratories and cloud providers an unusual role in deciding which defenders receive advanced tools and when. The letter's value will be measured outside the signatory page, by whether a water utility can obtain authorized testing, repair an exposed system without interrupting service, and pass the verified fix to another city before the same weakness is used against it.