A key threshold in AI-driven hacking has been crossed. Models can now autonomously chain multiple, distinct vulnerabilities together to execute complex, multi-step attacks—a capability they lacked just months ago. This significantly increases their potential as offensive cyber weapons.

Unlike human attackers, AI can ingest a company's entire API surface to find and exploit combinations of access patterns that individual, siloed development teams would never notice. This makes it a powerful tool for discovering hidden security holes that arise from a lack of cross-team coordination.

The same AI technology amplifying cyber threats can also generate highly secure, formally verified code. This presents a historic opportunity for a society-wide effort to replace vulnerable legacy software in critical infrastructure, leading to a durable reduction in cyber risk. The main challenge is creating the motivation for this massive undertaking.

Anthropic's new AI, Claude Mythos, can find software vulnerabilities better than all but the most elite human hackers. This technology effectively gives previously unsophisticated actors the cyber capabilities of a nation-state, posing a significant national security risk.

AI models can now operate across the entire software stack, from assembly to TypeScript. This ability to 'talk to the metal' removes many intermediary code layers, rendering obsolete the security models built around managing dependencies within those layers.

As AI generates more code, the developer tool market will shift from code editors to platforms for evaluating AI output. New tools will focus on automated testing, security analysis, and compliance checks to ensure AI-generated code is production-ready.

The long-term trajectory for AI in cybersecurity might heavily favor defenders. If AI-powered vulnerability scanners become powerful enough to be integrated into coding environments, they could prevent insecure code from ever being deployed, creating a "defense-dominant" world.

The old security adage was to be better than your neighbor. AI attackers, however, will be numerous and automated, meaning companies can't just be slightly more secure than peers; they need robust defenses against a swarm of simultaneous threats.

Details from an accidental leak reveal Anthropic's next model, Mythos, has "step change" capabilities in cybersecurity. The company warns this signals a new era where AI can exploit system flaws faster than human defenders can react, causing cybersecurity stocks to fall.