To see which devices are signed in to your ChatGPT account, open ChatGPT, go to Settings, choose Security, then select Active sessions. Review the device or app, approximate location, and sign-in time shown for each entry. If one does not look familiar, choose its sign-out option. If several entries worry you, use the option to sign out everywhere, then change your password and review your sign-in protection. Do not share passwords, recovery links, or verification codes with anyone while doing this.
Start with Active sessions
Active sessions is the place to check first when you used ChatGPT on a shared computer, replaced a phone, or notice activity you cannot explain. In ChatGPT, open your account settings and follow Security > Active sessions. OpenAI documents this path in its Managing active sessions in ChatGPT guide. Settings names and the layout can change, so use that current help page if your screen differs.
The list is a review tool, not a perfect device inventory. It can show the kind of device or app involved, an approximate location, and when the session signed in or was last active. Those clues are useful together. A phone model you recognize at the time you set up a new phone is probably expected; a browser session from a place you have never been, at a time you were asleep, deserves a closer look.
Do not treat the location as an exact address. Internet providers, cellular connections, workplace networks, VPNs, and privacy tools can make a location look broad or unexpected. Check the device and time first, then compare them with your own travel and sign-in history.
Decide whether a session is really unfamiliar
Before signing anything out, make a quick, calm comparison. Ask yourself:
- Did I use ChatGPT in a browser at work, school, a library, a hotel, or a family member's computer?
- Did I recently switch phones, update an app, clear browser data, or use a private browsing window?
- Does the date line up with a time I signed in on a device that may be labeled generically?
- Is the approximate location consistent with my carrier, office network, VPN, or travel?
If the answer is still no, act on the session rather than trying to investigate it indefinitely. You do not need to prove how it happened before removing access. If the session is a device you own but no longer use, signing it out is sensible housekeeping too.
This is related to, but separate from, checking the account on your phone. Our guide to securing a Google account before changing phones is a useful companion when a device transition involves more than one account.
Sign out one device or end all sessions
For one clearly unfamiliar entry, select that session's sign-out control in Active sessions. This is the least disruptive choice: your current, trusted devices can stay signed in while that session loses access. Reopen the list afterward to confirm the entry is gone or marked as signed out.
Choose sign out of all devices when you cannot identify several sessions, think someone may know your password, or used a public computer and cannot remember whether you signed out. Expect to log back in on your own devices afterward. Plan to have access to your email or normal sign-in method before you start, so you do not turn a quick security cleanup into a lockout.
OpenAI notes an important boundary: active-session controls manage first-party OpenAI sessions. They do not automatically sign you out of every unrelated service where you may have used the same browser. And if you sign in through a workplace, school, or other single sign-on (SSO) provider, session behavior and account recovery may be controlled partly by that provider. In that case, follow your organization's sign-in guidance or contact its administrator instead of assuming the ChatGPT list covers everything.
If you suspect someone accessed the account
Signing out ends a current session; changing credentials helps prevent a new one. If you suspect access, change your ChatGPT password from a device you trust as soon as you have signed out the unknown session or all sessions. Use a new, unique password rather than a slight variation of an old one. If you use a password manager, let it create and save a long unique password.
Next, review the multi-factor authentication options available in your account and turn them on if they fit your sign-in setup. Only enter a code into the official ChatGPT app or website after you initiated the sign-in yourself. A legitimate support process should not require you to send a password, backup code, or screenshot of a verification code in a chat or email.
Also check the email account attached to ChatGPT. If somebody can reset that inbox, a changed ChatGPT password alone may not be enough. Consider reviewing recent security notices, recovery settings, and unfamiliar forwarding rules in your email provider. For a broader low-stress routine, use our account security checklist before changing phones as a reminder to protect the account that receives recovery messages.
Keep your next ChatGPT session tidy
The easiest security work is the kind you do before there is a problem. When you use ChatGPT on a shared or borrowed computer, use a private window if appropriate, do not save the password in that browser, and explicitly sign out before you leave. On your own devices, remove old browsers and unused apps from the rotation so an unfamiliar label is easier to spot later.
It also helps to keep sensitive details out of ordinary prompts. ChatGPT can be useful for organizing a plan, but it does not need passwords, financial account numbers, recovery codes, or confidential work material to help. Our ChatGPT Voice action-plan guide shows one practical way to use the tool while keeping the conversation focused on the information it actually needs.
Finally, make a small habit of reviewing Active sessions after a trip, a shared-computer login, or a device replacement. Most entries will be ordinary. The value is that you will notice the one that is not, know exactly where to remove it, and take the next security step without panic.
Official sources
- OpenAI Help Center: Managing active sessions in ChatGPT
- OpenAI Help Center: ChatGPT release notes