Mythos 5 and Fable 5 suspension: full timeline

9 Jun 2026

Anthropic launches Fable 5 and Mythos 5

Anthropic released Claude Fable 5 across the Claude API, AWS, and Microsoft Foundry, with the Mythos 5 model made available to Project Glaswing partners. Both models share the same underlying architecture.

Source: InfoQ

11 Jun 2026

Amazon raises a security concern with the White House

According to Fortune, Amazon CEO Andy Jassy alerted senior administration officials that Amazon researchers had used a series of prompts to get the Mythos-class model to disclose restricted information about cyberattacks. It is unclear whether the testing was done at the government's request.

Source: Fortune

12 Jun 2026 17:21 ET

US Commerce Department issues export-control directive

Commerce Secretary Howard Lutnick signed a directive subjecting Fable 5 and Mythos 5 to export controls, citing national security and barring access by any foreign national, including foreign persons inside the United States. Anthropic said it received the directive at 5:21 PM ET.

Source: 9to5Mac

12 Jun 2026

Anthropic disables both models globally

Anthropic disabled access to Fable 5 and Mythos 5 worldwide to comply with the directive, stating it could not filter users by nationality in real time. Axios reported the company was given roughly 90 minutes to take the models down.

Source: CNBC

12 Jun 2026

Anthropic disputes the basis for the action

In a public statement, Anthropic described the cited jailbreak as a narrow, non-universal method and said the same capability is widely available from other models, including OpenAI's GPT-5.5. The company said it was working to restore access as soon as possible.

Source: Anthropic

12 Jun 2026

Other Claude models remain available

The directive applied only to Fable 5 and Mythos 5. Anthropic's other models, including Opus 4.8, Sonnet 4.6, and Haiku 4.5, remained available to all users.

Source: CNBC

13 Jun 2026

Al Jazeera reports the foreign-national access ban

Al Jazeera reported that the US order required Anthropic to prevent all foreign nationals from accessing Fable 5 and Mythos 5, citing national security. The ban extended to foreign nationals physically present in the US, including some Anthropic employees.

Source: Al Jazeera

13 Jun 2026

European politicians call the move a wake-up call

French politician Bruno Retailleau said Washington's decision to cut access should serve as a wake-up call, warning that nations dependent on foreign technology risk being unplugged overnight. Other figures including Benjamin Haddad and Jordan Bardella urged stronger European AI capacity.

Source: Euronews

13 Jun 2026

European Commission assesses the impact

The European Commission said it was assessing the practical implications of the restrictions for EU users. Spokesperson Thomas Regnier said contingency measures should not be discriminatory against partners.

Source: Benzinga

15 Jun 2026

Security leaders urge the administration to restore access

A group of cybersecurity leaders led by former Facebook security chief Alex Stamos urged the Trump administration to reverse the restrictions, arguing the capability is replicable in other models and that cutting it off aids adversaries. White House AI adviser David Sacks was reported to have secured a voluntary order without a licensing regime.

Source: Axios

15 Jun 2026

EU sovereignty push accelerates

The Register reported that the US restrictions intensified the EU's technological sovereignty efforts, coming days after the bloc launched its European Technological Sovereignty Package. Officials pointed to the AI Act, the Cyber Resilience Act, and the NIS2 Directive, and highlighted Mistral AI as a flagship domestic project.

Source: The Register

Now

As of 15 June 2026, Mythos 5 is still suspended.

This row reads the live API check on this page. The verdict at the top of the site is decided only by that probe, not by the reports above.