**[OpenAI, Anthropic, and Over 100 Organizations Co-Sign Open Letter Calling for Strengthened Cyber Defense in the AI Era]** Odaily Planet Daily News: OpenAI co-founder Greg Brockman shared an open letter co-signed by over 100 organizations, including Anthropic, AWS, Google, Microsoft, OpenAI, and Oracle, calling for global efforts to strengthen cyber defense in response to the rapidly advancing capabilities of AI-driven cyberattacks. The open letter highlights that in the coming months, AI-powered cyberattacks are expected to become more widespread and sophisticated, posing greater risks to critical systems such as hospitals, water treatment facilities, and internet infrastructure. Stakeholders are urged to take advantage of the current window of opportunity, during which AI can also enhance defensive capabilities, to accelerate the remediation of long-standing security vulnerabilities and prioritize the deployment of AI-powered cybersecurity tools to teams defending critical infrastructure. The letter also calls on businesses, cybersecurity companies, governments, and leading AI organizations to collectively invest in tools, funding, and technical support to strengthen threat intelligence sharing, vulnerability remediation, and continuous security monitoring.