Palo Alto launches a multi-model AI security service

Palo Alto Networks announced Unit 42 Continuous Frontier AI Defense on September 22. The company says the service uses a multi-model harness with Anthropic's Claude Mythos 5, OpenAI's GPT-5.6-Cyber, and open-weight models to find vulnerabilities, validate real-world exploitability, and speed up remediation. Unlike a one-time scan, it runs a baseline assessment and keeps testing as an organization's applications, APIs, cloud infrastructure, source repositories, and network assets change. Palo Alto says it is available worldwide on an annual subscription. The practical point is the model-routing layer: the service sends different security tasks to different models instead of treating one model as a complete security strategy. Palo Alto's own testing says no single model found more than 40% of vulnerabilities in a complex environment, so coverage and validation matter as much as model quality. Sources: https://investors.paloaltonetworks.com/news-releases/news-release-details/palo-alto-networks-delivers-anthropics-mythos-and-openais-gpt-56 https://www.paloaltonetworks.com/blog/2026/09/introducing-unit-42-continuous-frontier-ai-defense/