OpenAI, Anthropic lead 100+ firms in AI cyber threat warning

More than 100 technology and financial services companies issued a joint open letter Thursday warning that organizations have only months to prepare for AI-enabled cyberattacks targeting critical infrastructure, calling for immediate collective action from businesses, governments, and the tech industry itself.

The letter, signed by OpenAI, Anthropic, Google Alphabet Inc. ↘ 2.18%, Microsoft ↘ 1.22%, Amazon Web Services Amazon.com, Inc. ↘ 2.50%, and dozens of other firms, declared that "we have a limited window to strengthen cyber defenses" as AI models make sophisticated hacking capabilities cheaper and more accessible to attackers.axios

A Call Without Commitments

The signatories laid out a multi-pronged plan urging every organization to raise internal security standards, fix highest-risk weaknesses, and "raise the security bar for what you buy, build, and deploy, including AI-generated code". Cybersecurity companies are called upon to rapidly build AI-powered defense tools accessible to critical infrastructure operators and to share threat intelligence with one another.axios

Governments, meanwhile, are urged to strengthen channels for sharing actionable threat intelligence, coordinate defense at local, national, and international levels, and fund cyber defense. Frontier AI companies should give defenders access to their most capable models during major cyber incidents, along with "significant funding, training, and hands-on support," especially for critical infrastructure providers.axios

However, as Axios reported, the signatories stopped short of making any specific commitments, deadlines, or financial investments as part of the letter.axios

Rising Threats to Critical Infrastructure

The open letter comes amid a wave of cyberattacks against critical infrastructure, including one targeting U.S. water systems with an apparent AI-generated exploitation script. Hospitals, water treatment plants, and power grids face growing threats as AI drastically lowers the time and expertise hackers need to understand and exploit the complex systems that power industrial machinery.axios

Bloomberg reported that the coalition called for organizations and governments to make cyber defense "an immediate leadership priority" and to fix existing weaknesses in their own software. The letter's signatories include a range of cloud providers, cybersecurity firms, AI companies, telecoms, financial services companies, and think tanks.bloomberg+1

The letter amounts to an industry-wide acknowledgment that the same AI systems these companies are racing to build and deploy are simultaneously creating new attack surfaces — yet the path from warning to action remains undefined.