DARPA and ARPA-H joined forces for the AI Cyber Challenge (AIxCC), a two-year competition aimed at revolutionizing cybersecurity through AI-driven solutions. AIxCC asks the nation’s top talent in AI and cybersecurity to develop Cyber Reasoning Systems capable of automatically finding and fixing software vulnerabilities to secure critical software. In this talk, we are excited to announce the results of the Semifinals event. We will conduct a brief examination of the AI systems developed by the top teams by analyzing their strategies, discuss key innovations and methodologies employed, and discuss the overall impact of the competition on the cybersecurity landscape. The top-ranking teams will be eligible to win one of the $2 million in semifinal prizes, as well as a spot in the Finals competition at DEF CON 33.