Expired50% confidenceEventExact time
A message claiming that a model named Claude Fable 5.1 cracked the "Cyphral Distich" cipher sparked discussion on Hacker News.
1
Sources
50%
Confidence
Short-term (~14 days)
Relevance
9/13/2026
First Seen
Valid until: 9/27/2026(expired)
Sources
Related Entities
Related Claims
UnverifiedThe complete system prompt of the public version of Claude 5.1 was extracted and leaked by hackers, with the content reaching 275,000 words.71% similarUnverifiedClaude 5.1 can help identify software vulnerabilities in source code but still blocks the generation of exploit code, and binary vulnerability scanning and penetration testing requests are redirected.68% similarUnverifiedAnthropic's Fable 5 is a security-hardened version of Mythos, which was previously blocked due to vulnerabilities.66% similarUnverifiedAfter the system prompt of Fable 5 was leaked, the relevant project repository was taken down due to security concerns.65% similarUnverifiedAn article that sparked discussion on Hacker News argues that security through obscurity has completely failed, and that artificial intelligence has dealt it the final blow.64% similar
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https://kongchang.com/claim/919475API
curl https://kongchang.com/api/v1/knowledge/claims/919475MCP
get_claim(id=919475)