B1June 13, 2026·2 min read·264 words·7 vocab words·Source: Ars Technica

Anthropic Disables New AI Models After Government Warning

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Anthropic Disables New AI Models After Government Warning
Photo: Ars Technica
In brief

Anthropic has disabled its latest models, Fable 5 and Mythos 5, following a directive from the US Commerce Department. The government is concerned about a jailbreak that could bypass safety safeguards related to biology and cybersecurity. Although Anthropic disagrees with the decision, they have complied to ensure national security. The company expects to provide more information within twenty-four hours.

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Anthropic has officially shut down its new AI models, Fable 5 and Mythos 5, following a directive from the United States government. The company received an order from the Commerce Department on Friday evening. This directive subjects the new models to strict export controls. Consequently, Anthropic has disabled access for all customers to ensure they comply with the law. The government’s decision is based on concerns about national security. According to reports, there is a risk of a jailbreak. A jailbreak occurs when users find a way to bypass the safety safeguards of the AI. If these safeguards fail, the model might provide information about biology, chemistry, or cybersecurity. An administration official suggested that the government needs more time to harden its security apparatus against these threats. This process might take a few weeks to complete. Anthropic has apologized for the sudden disruption, which they described as a misunderstanding. However, the company has expressed strong disagreement with the government's reasoning. They argued that the jailbreak is narrow and not universal. They also pointed out that other publicly available models, such as GPT-5.5, possess similar capabilities. Earlier this month, President Trump signed an executive order regarding AI safety. This order encourages companies to participate in voluntary security testing. Anthropic has promised to release more details about the situation within the next twenty-four hours. For now, only Fable 5 and Mythos 5 have been removed. Other models from Anthropic are still functioning normally. This event has caused a major conversation about how the government should regulate new technology and the balance between innovation and national safety.

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Comprehension
Question 1 of 4

What does a jailbreak allow a user to do?

Grammar spotlight

Present Perfect

One point · B1

Use the Present Perfect to talk about a recent event that has a result in the present.

From this article

Anthropic has officially shut down its new AI models, Fable 5 and Mythos 5, following a directive from the United States government.

What to know · B1

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Neutral register

Scenario: Discussing industry regulations with a colleague.

  1. 01We need to comply with the directive.
  2. 02This will cause a disruption.
  3. 03What is the reasoning behind this?

Register tip · formal

🔑Key Phrases

has officially shut downha cerrado oficialmente

Indicates a formal and complete stop of operations.

Present Perfect tense

The factory has officially shut down its production line.

risk of a jailbreakriesgo de un desbloqueo/hackeo

Refers to the danger of software security being breached.

Noun + preposition + noun

Engineers are worried about the risk of a jailbreak.

harden its security apparatusreforzar su aparato de seguridad

Means making a security system stronger.

Verb + possessive + noun phrase

The agency needs to harden its security apparatus.

innovation and national safetyinnovación y seguridad nacional

Contrasts new ideas with the safety of a country.

Coordinated noun phrase

The law balances innovation and national safety.

🎙️ Article Audio — Kokoro TTS

Anthropic Disables New AI Models After Government Warning

Adapted from Ars Technica · Read the original. LinguaPress rewrites the facts as original graded-reader text for language learners.

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