The US just refused to give G7 allies special access to Anthropic’s Mythos 5 and Fable 5.
Rohan Paul Twitter · Rohan Paul (@rohanpaul_ai) · 2026-06-16
The US government denied G7 allies preferential access to Anthropic's Mythos 5 and Fable 5 models, citing a jailbreak that could bypass Fable 5's safety layer and unlock dangerous vulnerability-discovery behavior, while Anthropic disputes the scope of the risk.
Appears in
Extraction
Topics: ai-policyai-safetyexport-controlsanthropicjailbreaks
Claims
- The US refused to grant G7 allies special access to Anthropic's Mythos 5 and Fable 5 models.
- US officials warn that a jailbreak can bypass Fable 5's safety layer and enable dangerous vulnerability-finding behavior.
- Anthropic disputes the severity, characterizing the jailbreak issue as narrow and not unique to its models.
- The dispute represents a tension between allied AI-sharing requests and US export-control or safety concerns.
Key quotes
Washington says a jailbreak may let users bypass Fable 5's safety layer and reach dangerous vulnerability-finding behavior, while Anthropic says the issue is narrow and not unique to its models.