Researcher Claims Working Jailbreak on Top AI Models Including GPT-5.6, Claude Opus 5, and Fable

A well-known AI red teamer claims to have developed a universal jailbreak that works against leading large language models, including heavily guarded flagships such as GPT-5.6 Sol, Claude Opus 5, and Fable. In a public post on X, Pliny the Liberator described the technique as effective “on ALL models” and across every category he tested. He argued that, because of how the method works, it may be extremely difficult or even impossible to fully patch. Jailbreak on Top AI Models Unlike many jailbreak drops that go straight to open source, Pliny said he is withholding the full technique for now. His stated goal is a responsible disclosure window so AI labs, red teamers, safety researchers, and policymakers can review the issue...

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