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Anthropic Shuts Down Fable, Mythos Models After US Directive

Anthropic has abruptly disabled its newly launched Fable 5 and Mythos 5 AI models due to a directive from the U.S. Department of Commerce. The directive subjects these models to export controls, restricting their use outside the United States. This action was reportedly prompted by concerns over a potential jailbreak that could bypass safeguards related to cybersecurity, chemistry, and biology, although Anthropic stated they only received verbal evidence of a narrow jailbreak for finding minor software vulnerabilities. AI

IMPACT Government intervention in AI model releases highlights national security concerns and potential for regulatory impact on AI development and deployment.

RANK_REASON Government directive leads to immediate shutdown of newly released AI models.

Read on Mastodon — mastodon.social →

AI-generated summary · Google Gemini · from 2 sources. How we write summaries →

Anthropic Shuts Down Fable, Mythos Models After US Directive

COVERAGE [2]

  1. Ars Technica — AI TIER_1 English(EN) · Kyle Orland ·

    Anthropic shuts down Fable, Mythos models following Trump admin directive

    Commerce dept. worries that a Fable 5 "jailbreak" could be a national security threat.

  2. Mastodon — mastodon.social TIER_1 English(EN) · [email protected] ·

    Anthropic shuts down Fable, Mythos models following Trump admin. directive https://arstechnica.com/ai/2026/06/anthropic-shuts-down-fable-mythos-models-following

    Anthropic shuts down Fable, Mythos models following Trump admin. directive https://arstechnica.com/ai/2026/06/anthropic-shuts-down-fable-mythos-models-following-trump-admin-directive/ # AI # Tech # Policy