ChatGPT Now Lets You Lock Chats Behind a PIN: What the New Privacy Feature Actually Protects

Your ChatGPT history is probably a mess of work drafts, recipe ideas, travel plans, and at least one conversation you would rather not have someone stumble across. OpenAI finally gave that last category its own hiding place. On October 20, 2026, the company rolled out Locked Chats, a new feature that lets you seal conversations behind a four-digit PIN or biometric unlock.

It is the kind of small feature that makes you wonder why it took this long. Anyone who has ever handed a phone to a friend to show them one chat, while quietly praying they would not swipe into the others, understands the appeal immediately. The feature is available across ChatGPT Free, Go, Plus, Pro, Business, Enterprise, and Edu plans, though notably not on the Healthcare plan. The rollout is phased, so it may take a little time to appear on every account.

But a lock is only as honest as its fine print, and OpenAI’s comes with plenty of it. Here is how the feature works, what it genuinely protects, and the important things it does not do.

How Locked Chats Work

Locking a conversation is simple. Open the three-dot menu beside any chat, choose “Lock chat,” confirm, and set a four-digit PIN. That same PIN works across every device signed in to the same account, so you set it once and use it everywhere.

Once locked, the conversation leaves the main history, disappears from pinned chats, and no longer appears in conversation search. Instead, it lives in a dedicated section under Projects labeled “Locked chats.” Opening that section requires authentication: the PIN on web and desktop, or Face ID, Touch ID, or the device’s unlock method on supported phones and tablets.

OpenAI describes the intended use case plainly: you are discussing something personal, or planning a surprise, and you want to show someone another chat without exposing the private one. The locked conversation stays saved and fully usable, unlike Temporary Chats, which are never saved to history at all.

There are eligibility limits. The feature cannot be applied to temporary chats, archived conversations, group chats, chats opened from a shared link, chats with scheduled tasks, or chats containing meeting recordings. Codex conversations cannot be locked either.

The Memory Angle Is Actually Interesting

The more meaningful part of this update is what happens with memory. When you start a new conversation in Locked Chats mode, OpenAI says nothing from it is used to update ChatGPT’s regular memory. Memory is the feature that lets ChatGPT retain context from earlier conversations, so you do not have to explain everything twice.

With locked chats, that pipeline is partitioned. A locked chat keeps its own memory, shared only across other chats inside the same locked section. New messages sent after locking update that separate memory rather than your regular memory, so details from a locked conversation do not leak into unlocked chats. That matters for anyone who uses ChatGPT for personal or sensitive topics and wants those threads to stay self-contained, even from the model’s own cross-conversation recall.

Note the nuance: locking a chat does not erase anything ChatGPT already remembered before the lock. The partition applies going forward, not backward.

What the Lock Does Not Do

This is where you need to read carefully, because the list of things the lock does not do is longer than the list of things it does. OpenAI has been unusually explicit about it, which helps.

First, locking a chat does not add end-to-end encryption. It is an access barrier inside the app, not a separate encrypted vault. Second, it does not change data retention policies. OpenAI keeps the conversations for the same length of time as before. Third, it does not alter the “Improve the model for everyone” training setting. If you had training enabled, it stays enabled for locked chats too. Fourth, it does not protect against legal or workplace obligations. If your account or data is subject to a legal request or an employer’s policies, a PIN on a chat changes nothing.

There is one more sharp edge worth flagging. Resetting your PIN permanently deletes every locked chat, every file, and every item tied to the old PIN. OpenAI says this cannot be undone, and that support cannot recover the deleted content. So if you forget your PIN, the locked material is gone for good. The design makes sense as an anti-theft measure, but it also means the locked section is a risky place to keep conversations you care about.

Why This Matters for Regular Users

Taken together, Locked Chats is best understood as privacy from the people around you, not privacy from the company. The lock keeps a curious friend, a nosy relative, or a colleague who borrows your laptop from casually browsing your most personal threads. It does not hide your conversations from OpenAI’s systems, from legal processes, or from anyone with access to your account.

That is not a criticism. Most privacy failures in real life are not sophisticated attacks. They are a screen visible over a shoulder, a phone left on a table, a laptop open in a meeting. A simple PIN check closes those gaps nicely, and the separate memory partition is a genuine improvement for users who want sensitive topics to stay self-contained.

For everyone else, this is a welcome bit of practical privacy. Check the three-dot menu on your next sensitive chat, set a PIN you will actually remember, and keep a mental note of the reset rule. The lock is good, the fine print is fine, and as long as you know the difference, you can use it well.

Frequently Asked Questions

How do I lock a chat in ChatGPT?

Open the three-dot options menu beside the conversation and select “Lock chat.” You will be asked to confirm and set a four-digit PIN. On supported phones and tablets, you can also enable Face ID, Touch ID, or your device unlock method for convenience.

Does locking a chat encrypt it?

No. OpenAI is explicit that Locked Chats do not add end-to-end encryption and do not create a separate encrypted vault. The feature is an access barrier within the app. Data retention, model training settings, and anything ChatGPT already remembered all remain unchanged.

What happens if I forget my Locked Chats PIN?

Resetting the PIN permanently deletes all locked chats, files, and other items tied to the old PIN. OpenAI says this cannot be undone and that support cannot recover the deleted content, so only keep conversations in the locked section that you can afford to lose.