OpenAI has introduced a new privacy feature for ChatGPT that allows users to protect individual conversations with a four-digit PIN. The feature, called Locked Chats, is designed to prevent others from accessing sensitive conversations when using a shared device or viewing someone’s ChatGPT account.

Locked Chats was announced on 20 October 2026 and is gradually being rolled out to users with all major ChatGPT subscription plans, including the free version.