OpenAI latest AI model, GPT-5.6 Sol, likely has security vulnerabilities similar to one that led the Trump administration to impose export controls on Anthropic’s Fable 5 model, according to findings from U.K. government agency.
OpenAI markets its latest model, GPT-5.6 Sol, as its most secure to date, but the British government researchers who tested it prior to release say the model’s guardrails are susceptible to jailbreaks that can unlock dangerous cyber capabilities.The agency, the U.K. AI Security Institute (AISI), “identified universal jailbreaks in the cyber domain, including jailbreaks that allowed for long-form agentic task completion in domains like vulnerability discovery and exploit development,” according to a summary of its findings contained in a technical report OpenAI published Thursday.
In other words, it was possible to trick GPT-5.6 into ignoring controls meant to prevent it from engaging in cyber attacks. Once those guardrails were breached, users could get the model to find software vulnerabilities and autonomously hack into systems.The agency said the jailbreaks were relatively easy to discover and were “were often developed within hours,” although OpenAI granted UK AISI researchers privileged access to the system’s inner workings that likely sped up this timeline, and would not be easily replicated by a normal user. OpenAI said it had worked to “reproduce and mitigate the specific jailbreaks reported by UK AISI.”
