Mythos goes to Tokyo: Japanese banks to get Anthropic's vulnerability-hunting AI

"MUFG, Mizuho, and SMFG would be the first Japanese institutions added to Anthropic's restricted Project Glasswing rollout, a source familiar with the matter told Reuters Japan's three megabanks are set to gain access to Claude Mythos, Anthropic's vulnerability-hunting AI model, within roughly two weeks, a source familiar with the matter told on Tuesday."

"It would be the first time a Japanese company has been granted entry to the restricted preview, which has so far been confined to Anthropic's American and a handful of European partners. Mitsubishi UFJ Financial Group, Mizuho Financial Group, and Sumitomo Mitsui Financial Group were informed of the move during meetings in Tokyo this week with US Treasury Secretary Scott Bessent. The three lenders are expected to be onboarded by the end of May."

"Mythos has been treated by regulators and chief executives as a category-shifting event since Anthropic disclosed its existence earlier this month. The model has discovered thousands of previously unknown zero-day vulnerabilities across every major operating system and every major web browser, and in internal testing it wrote working exploits, including chains that escape both renderer and operating-system sandboxes in a browser."

"Anthropic has not released the model publicly. Instead, it has run a controlled rollout under what it calls Project Glasswing, with 12 named launch partners, including AWS, Apple, Cisco, Google, JPMorganChase, Microsoft, Nvidia, and Palo Alto Networks, and around 40 further institutions granted access on a case-by-case basis."

MUFG, Mizuho Financial Group, and Sumitomo Mitsui Financial Group are expected to be added to Anthropic’s restricted Project Glasswing rollout, gaining access to Claude Mythos within roughly two weeks. This would be the first time a Japanese company receives entry to the restricted preview, which has previously been limited to Anthropic’s American and a handful of European partners. The three banks were informed during meetings in Tokyo with US Treasury Secretary Scott Bessent and are expected to be onboarded by the end of May. Mythos has been treated as a category-shifting event, discovering thousands of previously unknown zero-day vulnerabilities and generating working exploit chains in internal testing. Mozilla shipped Firefox 150 with fixes for 271 vulnerabilities found by Mythos. Anthropic has not released Mythos publicly and instead runs a controlled rollout with named launch partners and additional institutions granted access case by case.

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