‼️ Anthropic's recently released frontier model Fable 5 was jailbroken by someone using a jailbroken version of Claude Opus.
The researcher who goes by the moniker pliny carried out the jailbreak and says: "the consensus seems to be that this has been one of the most disappointing model drops of all time, effectively preventing legitimate researchers from contributing their talents to our collective advancement"
The jailbroken version can be used for research into and exploitation of vulnerabilities.