Mind against machine: World's top hackers, AI agents clash in Seoul

More than 3,300 digital combatants from 88 countries competed in Codegate 2026, Korea's premier international hacking defense tournament, held in Seoul this week. Japanese team BunkyoWesterns won the open division grand prize of 50 million won ($36,000) by solving complex cryptographic puzzles. The 18th annual event has evolved into a critical proving ground for ethical hackers to stress-test digital infrastructure amid the rise of AI-powered cyber threats.

Inside the sprawling, subterranean convention halls of Coex in southern Seoul this week, the battlefield was entirely silent, marked only by the rhythm of frantic keystrokes and the blue glow of monitors. More than 3,300 digital combatants from 88 countries had spent months attempting to breach lines of code. By Thursday, only a select few remained for the main event: Codegate 2026, Korea’s premier international hacking defense tournament and one of the world’s most prestigious arenas for white-hat hackers. Now in its 18th year, the annual event has evolved far beyond a routine cybersecurity convention. In an era where artificial intelligence AI threatens to supercharge digital warfare, Codegate has become a critical proving ground — a place where the world's elite ethical hackers stress-test the digital infrastructure powering our interconnected lives. This year's competition delivered high-stakes drama. In the open division, Japanese powerhouse squad BunkyoWesterns claimed top honors and the 50 million won $36,000 grand prize, navigating complex cryptographic puzzles and syst