OpenAI, Anthropic and Google join 100+ companies calling for AI-powered cyber defense

Three of the biggest names in consumer AI — OpenAI, Anthropic and Google — put their rivalry aside this week to sign a joint open letter alongside more than a hundred other companies and organizations, calling for a coordinated, industry-wide push toward AI-powered cyber defense.

The core argument: the same AI capabilities that make ChatGPT, Claude and Gemini useful for writing and coding also lower the bar for automated, AI-assisted cyberattacks. The letter frames this as a narrowing window — attackers are starting to use AI to find and exploit vulnerabilities faster than human defenders can patch them — and calls for putting equivalent AI-driven defensive tooling directly into the hands of the teams protecting critical infrastructure, rather than leaving cyber defense as a purely reactive, human-paced effort.

For everyday users of these tools, this isn't a feature announcement — it's a signal of where the major labs think the next real risk sits. It's also a rare moment of coordination between companies that normally compete hard for the same users and enterprise contracts, which is itself worth noting when you're deciding how much to trust any one vendor's safety claims in isolation.