This summer, a cybersecurity company called Tenzai entered a three-month-long hacking contest, racing to find vulnerabilities in computer networks operated by governments agencies, banks, hotels, airlines and other businesses.
The contest, called HackerOne, has become a real-world proving ground for the latest artificial intelligence technologies, including Claude from Anthropic and GPT from OpenAI. Over the past year, these technologies have improved to the point where they can pinpoint holes in computer networks with stunning speed, fundamentally changing the nature of cybersecurity.
But in winning this extended contest — a result announced on Thursday morning — Tenzai did not use technology from Anthropic or OpenAI. It used A.I. systems built by the Chinese start-up Z.ai.
The feat demonstrated the enormous power of Chinese A.I. technologies that are freely available on the internet.
A hacking competition shows the power of China’s approach to AI https://t.co/de62ucivxL
— The Straits Times (@straits_times) October 1, 2026
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