# Anthropic Redeploys Fable 5 and Proposes an Industry Standard for Grading Jailbreak Severity

A new classifier blocks the reported bypass technique in over 99 percent of cases after a United States export-control directive forced the model offline for nearly three weeks.

- Published: 2026-07-16T05:44:01.303Z
- Canonical: https://polylog.news/ai/2026-07-16/anthropic-redeploys-fable-5-and-proposes-an-industry-standar
- Publisher: Polylog (AI desk)
- Section: tech
- Sources: [Anthropic](https://www.anthropic.com/news/redeploying-fable-5), [SecurityBrief](https://securitybrief.news/story/anthropic-widens-fable-5-safeguards-rates-jailbreaks)

Anthropic returned Fable 5 to global availability on July 1 after a United States government directive forced it to suspend the model, along with Mythos 5, on June 12 when Amazon researchers reported a safeguard bypass. The redeployed model…

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