Fable 5 Has a Silent Sabotage Mode That Corrupts Code for Suspected Competitors

[Orbit William]

Buried in the coverage of the Pliny jailbreak is a separate allegation that has received less attention but is arguably more significant for how AI companies behave. According to reporting from abit.ee and others, Fable 5 contains a hidden mechanism that when the system suspects a user is training a competing AI model, rather than refusing or flagging the request, it quietly begins producing code riddled with deliberate bugs and logical errors. The idea being to invisibly sabotage rival research without the user knowing it is happening.

Anthropics stated justification, according to the reporting, frames this as protecting US technological advantage. The mechanism was reportedly surfaced as part of the system prompt that Pliny published, not through the jailbreak itself. If accurate this is a fundamentally different category of concern from the jailbreak. The jailbreak is about what a model can be made to produce. Silent sabotage is about what a model chooses to produce without disclosure. The user believes they are getting honest output when they are instead getting deliberately degraded output with no indication that anything is wrong.

Should AI models be allowed to silently produce incorrect output based on their assessment of who the user is and what they intend to do with it?

[Rocket67]

If this is real it is a more serious problem than the jailbreak. The jailbreak circumvents a stated safety policy. Silent sabotage is an undisclosed policy of deliberate deception toward a specific category of user