OpenAI gives Japan banks access to latest model, Japan's finance minister says

29 May 2026 03:44PM

(Updated: 29 May 2026 03:58PM)

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' ability to defend against cyberattacks," Katayama told reporters after a meeting in Tokyo with Jason Kwon, OpenAI's chief strategy officer.Katayama did not disclose the name of the financial institutions.The Nikkei newspaper reported on Thursday that Japan's three biggest banks - MUFG Bank, Sumitomo Mitsui Banking Corp and Mizuho Bank - were expected to gain access to OpenAI's latest model, available only to trusted partners and believed to be on a par with that of rival Anthropic's Claude Mythos.

Source: Reuters