TOKYO, May 29 : Some Japanese financial institutions were granted access to U.S. AI giant OpenAI's GPT-5.5 model to defend against cyberattacks, Japanese Finance Minister Satsuki Katayama said on Friday."This is a welcome development and a big step forward in strengthening Japanese financial institutions' abi

OpenAI's GPT-5.5-Cyber model heads to Japan's three megabanks as part of a US-Japan cybersecurity deal covering 15 critical infrastructure sectors.

OpenAI will provide its GPT-5.5-Cyber model to Japan's megabanks and government for cybersecurity, as AI-driven threats reshape the financial security landscape.