# US Lifts Export Controls on Anthropic's Fable 5 After Three-Week Freeze

*2026-07-03 06:01 UTC · AI · 1 min read*

> Anthropic's Fable 5 is back online after the US lifted a three-week export-control freeze triggered by a discovered jailbreak.

The US Commerce Department lifted export controls on Anthropic's Claude Fable 5 and its underlying Mythos 5 cybersecurity system on June 30, ending a roughly three-week freeze that had pulled the flagship model offline for users worldwide.

The controls were imposed on June 12 after Amazon researchers found a way to bypass Fable 5's safeguards, tricking it into identifying software vulnerabilities and demonstrating exploitation techniques. Unable to verify user nationality in real time, Anthropic suspended access for everyone rather than risk violating the restriction. In exchange for reinstatement, Commerce Secretary Howard Lutnick required Anthropic to give the government pre-release access to national-security-relevant models, rapidly share newly discovered jailbreaks, staff dedicated research teams on government priorities, and help build common industry security standards.

Fable 5 returned globally on July 1 across Claude.ai, Claude Code, and Claude Cowork, though usage is capped at 50% of normal weekly limits through July 7 before full availability resumes. Anthropic says it has also deployed an improved safety classifier that blocks the reported bypass technique in over 99% of cases.

## Sources

- [anthropic.com](https://www.anthropic.com/news/redeploying-fable-5)
- [thenextweb.com](https://thenextweb.com/news/anthropic-fable-5-export-controls-lifted)

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TechTools News · https://techtools.cz/tools/news/article/1937-us-lifts-export-controls-on-anthropic-s-fable-5-after-three-week-freeze
Česká verze: https://techtools.cz/tools/news/clanek/2010-usa-zrusily-exportni-kontroly-na-fable-5-od-anthropic-po-tritydennim-vypadku