Amazon.com Inc.
(NASDAQ:AMZN) CEO Andy Jassy was reportedly behind the security concerns that led to a U.S. export control ban on Anthropic's two "Mythos-class" AI models, built for highly complex reasoning and long-horizon agentic work.
Jassy's Treasury Warning Sparks Global Shutdown The Wall Street Journal reported Saturday, citing sources, that Jassy told Treasury Secretary Scott Bessent that Amazon researchers used the Fable 5 model to obtain information usable in cyberattacks, prompting Anthropic's global shutdown of the models.
On Friday, Anthropic disabled access to Fable 5 and Mythos 5 after the government directed the company to bar foreign nationals from the systems on national security grounds.
The Information and Reuters similarly reported the concerns, attributing them to Amazon, a major Anthropic investor.
