Anthropic Disables AI Models After US National Security Order

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  • June 13, 2026 at 2:21 PM ET
  • Est. Read: 2 Mins
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Key Takeaways

Anthropic has disabled its advanced AI models Fable 5 and Mythos 5 following a U.S. government order citing national security concerns. The directive blocks foreign nationals from using these models globally, prompting Anthropic to disable them for all users.

  • U.S. government issued export-control directive blocking foreign access to Fable 5 and Mythos 5
  • Anthropic received verbal notice of potential 'jailbreak' method for Fable 5
  • Pentagon prioritized national security over commercial interests, placing Anthropic on blacklist
  • Experts warn Mythos models could accelerate sophisticated cyberattacks if used maliciously
  • Anthropic confidentially filed for U.S. IPO last month

Source Claims Check

High Consensus
All 6 publishers report consistent facts across 6 key claims.
ClaimStatusReason
Us Government OrderBroad Agreementblocks foreign nationals from using Fable 5 and Mythos 5 globally
Anthropic's ResponseBroad Agreementdisabled access to models for all users
National Security ConcernBroad Agreementpotential method of bypassing safeguards in Fable 5
Pentagon's StanceBroad Agreementprioritized national security over commercial interests, placed Anthropic on blacklist
Impact On CyberattacksBroad Agreementexperts warn Mythos models could accelerate sophisticated cyberattacks if used maliciously
Anthropic's Ipo FilingBroad Agreementconfidentially filed for U.S. IPO last month
Us Government Order
Broad Agreement
blocks foreign nationals from using Fable 5 and Mythos 5 globally
Anthropic's Response
Broad Agreement
disabled access to models for all users
National Security Concern
Broad Agreement
potential method of bypassing safeguards in Fable 5
Pentagon's Stance
Broad Agreement
prioritized national security over commercial interests, placed Anthropic on blacklist
Impact On Cyberattacks
Broad Agreement
experts warn Mythos models could accelerate sophisticated cyberattacks if used maliciously
Anthropic's Ipo Filing
Broad Agreement
confidentially filed for U.S. IPO last month
This analysis is AI-generated and may not perfectly represent each source's reporting. Always read the original articles for full context.

Anthropic has disabled access to its advanced AI models Fable 5 and Mythos 5 following a U.S. government order that cited national security concerns. The directive blocks foreign nationals from using these models globally, prompting Anthropic to disable them for all users.

The company received the export control directive without specific details of the national security concern. According to multiple reports, the government believes there is a method of bypassing safeguards that would prevent Fable 5 from being used in identifying software vulnerabilities. As reported by Reuters, Amazon CEO Andy Jassy was among tech leaders who raised concerns about these risks.

The order comes amidst growing tensions between AI developers and regulators over assessing risks from so-called 'jailbreaks,' or methods used to bypass model safeguards. Anthropic had previously called for greater U.S. oversight of AI but stated that the government action did not follow principles of fair and fact-based regulation.

Anthropic's relationship with the government has been strained this year after it refused to allow the U.S. military to use its AI models for domestic surveillance and fully autonomous weapons systems. The Pentagon's chief information officer, Kirsten Davies, emphasized prioritizing national security over commercial interests. According to Time, the Defense Department placed Anthropic on a blacklist deeming it too dangerous for government use.

The action also marks a major escalation of U.S. efforts to halt foreign adversaries' AI capabilities. Experts have warned that Mythos models could accelerate sophisticated cyberattacks if used maliciously. The timing of the announcement could be damaging to Anthropic, coming ahead of an expected initial public offering in the U.S., as reported by Time. AI rival SpaceX launched its own IPO on Friday, becoming the sixth-most-valuable public company in the U.S., with a market cap of $2.1 trillion.

Anthropic confidentially filed for a U.S. IPO last month, edging ahead of rival OpenAI in the race to reach public markets.

How this summary was created

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