ChatGPT Locked Chats adds PIN and biometrics, with privacy caveats

OpenAI's Locked Chats hides selected ChatGPT conversations from history and search, opening them via a four-digit PIN or biometrics on mobile. However, previously shared links keep working, and details saved to memory before locking remain in regular ChatGPT memory.

• Chats unlock via a four-digit PIN or biometrics on mobile
• Resetting a forgotten PIN deletes all locked chats and files
• Shared links created earlier still open the conversation
• Details stored in memory before locking are not erased