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

A public post by a researcher claims a universal jailbreak that can bypass safety filters across major LLMs (including flagship models), with the author withholding full details for a limited responsible-disclosure period; the claim, if validated, highlights gaps in guardrails and cross-model generalization of adversarial prompts, but currently lacks independent verification or evidence of active exploitation, so organizations are advised to maintain monitoring, least-privilege access, and human review for high-risk workflows.