In a significant move to address cybersecurity risks, Japan’s top banks are set to receive access to Anthropic’s artificial intelligence model, Mythos. According to a source with direct knowledge, Mitsubishi UFJ Financial Group, Mizuho Financial Group, and Sumitomo Mitsui Financial Group will be granted access to the model within about two weeks.
Mythos has been regarded by cybersecurity experts as a major challenge to the banking sector, particularly due to its potential to disrupt legacy technology systems. As a result, regulators and policymakers have issued warnings about the potential risks associated with the model.
It’s worth noting that several U.S. banks have already been granted access to Mythos, and Anthropic plans to extend access to European and UK banks, as well as other organizations, in the near future.
In response to the potential risks posed by Mythos, Japanese Finance Minister Satsuki Katayama met with U.S. Treasury Secretary Scott Bessent and announced the establishment of a public-private working group to address cybersecurity risks to the Japanese financial system. The group’s first meeting is scheduled for Thursday.
Some key points to consider:
- Access to Mythos: Japan’s top banks will soon have access to the AI model, which could potentially help them improve their cybersecurity measures
- Cybersecurity risks: The model poses significant challenges to the banking sector’s legacy technology systems, prompting warnings from regulators and policymakers
- International cooperation: The issue is being addressed through international cooperation, with Japan and the U.S. working together to establish a public-private working group
The implications of this development are significant, and it will be interesting to see how Japan’s top banks utilize the Mythos AI model to enhance their cybersecurity measures.
Disclaimer: The information provided is based on reports from Reuters and is subject to change as the situation evolves.

