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Security2026-06-07 · source-backed
First teased in February, Lockdown Mode is now live across Free, Go, Plus, Pro, and self-serve Business. It limits outbound network requests to break the exfiltration leg of Simon Willison's "lethal trifecta," using deterministic controls rather than asking an AI to evaluate whether something's safe. Source: Simon Willison / OpenAI Help The quiet implication is the real story: an opt-in mode means default ChatGPT does not robustly stop a determined exfiltration attack. CISO Dane Stuckey framed it as a tool for elevated-risk users with functionality tradeoffs. If you've connected ChatGPT to private data and you haven't turned this on, you're running the unsafe default.
Each link below shares sources, entities, or timing with this story.
OpenAI released Lockdown Mode / Shared entities / Same source / Shared topic / What happened next
Linked by a graph relationship (OpenAI released Lockdown Mode); both cover Lockdown Mode, OpenAI, Simon Willison; cite the same source (Source: Simon Willison / OpenAI Help).
OpenAI released Lockdown Mode / Shared entities / Shared topic / What happened next / Tension
Linked by a graph relationship (OpenAI released Lockdown Mode); both cover Business, ChatGPT, OpenAI; overlapping topics (business, chatgpt, control).
ChatGPT built by OpenAI / Shared entities / Shared topic / What happened next
Linked by a graph relationship (ChatGPT built by OpenAI); both cover Business, ChatGPT, Plus; overlapping topics (business, chatgpt, connected).
OpenAI released Lockdown Mode / Shared entities / What happened next
Linked by a graph relationship (OpenAI released Lockdown Mode); both cover Business, Free, OpenAI, Plus; picks up the Business thread on 2026-08-16.
OpenAI released Lockdown Mode / Shared entities / Same source domain / Shared topic / What happened next / Tension
Linked by a graph relationship (OpenAI released Lockdown Mode); both cover OpenAI, Simon Willison; reported by the same outlet (simonwillison.net).
Linked by a graph relationship (OpenAI released Lockdown Mode); both cover OpenAI, Simon Willison; reported by the same outlet (simonwillison.net).
OpenAI released Lockdown Mode / Shared entities / Same source domain / What happened next
Linked by a graph relationship (OpenAI released Lockdown Mode); both cover ChatGPT, OpenAI, Simon Willison; reported by the same outlet (simonwillison.net).
Linked by a graph relationship (OpenAI released Lockdown Mode); both cover ChatGPT, OpenAI, Simon Willison; reported by the same outlet (simonwillison.net).