Anthropic’s newest AI models were supposed to showcase the company’s technological lead ahead of a highly anticipated IPO. Instead, they’ve been pulled offline worldwide after the Trump administration imposed export controls over security concerns.

Now, reports suggest that one of the people who helped raise those concerns was none other than Amazon CEO Andy Jassy. Amazon (NYSE: AMZN) has invested billions of dollars into Anthropic and stands to benefit from its success.

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According to reporting from The Wall Street Journal (1), later echoed by Reuters (2), TechCrunch (3) and The Information (4), Jassy told Treasury Secretary Scott Bessent and other officials that Amazon researchers had used Anthropic’s new Fable 5 model to obtain information that could potentially be used in cyberattacks. Shortly afterward, the government moved to restrict access to Fable 5 and Anthropic’s even more powerful Mythos 5 model.

Anthropic strongly disputes the characterization (5).

What’s known about Amazon’s role

Amazon has not confirmed the details of any conversations between Jassy and government officials, though Reuters and TechCrunch reported that a company spokesperson acknowledged that governments sometimes seek Amazon’s input on potential security risks.

The situation is unusual because Amazon is one of Anthropic’s biggest backers. The e-commerce and cloud giant has invested at least $8 billion (6) in the startup and has committed to invest as much as $25 billion overall. Amazon’s stake was recently estimated to be worth more than $74 billion on paper following Anthropic’s meteoric rise in valuation.

The dispute also comes just days after Anthropic CEO Dario Amodei publicly warned (7) that AI development may be advancing too quickly and called for stronger safeguards around increasingly capable systems.

Administration officials have argued that Anthropic failed to adequately address concerns after researchers demonstrated ways to bypass the models’ guardrails (8). David Sacks, who co-chairs the President’s Council of Advisors on Science and Technology, said the government asked Anthropic to fix or remove the models and that the company declined. Anthropic contests that account.

Amazon did not respond to Moneywise’s request for comment on this matter.