A coalition of high-profile cybersecurity leaders, including researchers and CEOs, is pushing back against the Trump administration’s decision of restricting the access to Anthropic’s newest models Fable 5 and Mythos 5. In a letter sent to US Commerce Secretary Howard Lutnick, these executives from technology firms and cybersecurity experts are calling for a reversal of orders.

The US government restrictions cite national security concerns over the AI models Fable 5 and Mythos 5.

One CEO said the move by the Trump administration and the response by Anthropic would 'send shockwaves' across AI labs.

Anthropic said it has blocked public access to its new AI models after the Commerce Department barred their use by foreign nationals.