By Takaya Yamaguchi

TOKYO, May 13 (Reuters) – Japan’s three largest banks are expected to ‌gain access to Mythos, the artificial intelligence ‌model developed by Anthropic, in about two weeks, a ​person with direct knowledge of the matter said.

Mythos is viewed by cybersecurity experts as posing significant challenges to the banking industry and its ‌legacy technology systems, ⁠prompting a series of warnings from regulators and policymakers.

A string of U.S. ⁠banks have so far been given access to Mythos and Anthropic aims to expand access ​to ​European and UK banks, ​among other organisations, ‌Reuters reported last month. Mitsubishi UFJ Financial Group, Mizuho Financial Group and Sumitomo Mitsui Financial Group declined to comment. Anthropic did not respond to a request for comment. On Tuesday, Japanese Finance ‌Minister Satsuki Katayama met U.S. ​Treasury Secretary Scott Bessent ​and later said ​Japan would establish a public-private ‌working group this week to ​address cybersecurity ​risks to the Japanese financial system posed by Mythos. The group’s first meeting will be ​held on ‌Thursday.

(Reporting by Takaya Yamaguchi; Additional reporting by ​Miho Uranaka; Writing by Sam Nussey; ​Editing by Muralikumar Anantharaman)