Codex/ChatGPT update deleted all the conversations

What version of the Codex App are you using (From “About Codex” dialog)?

Codex, Chat GPT -5

What subscription do you have?

free

What platform is your computer?

uname -mprs

What issue are you seeing?

After updating ChatGPT with Codex app on macOS on July 15, 2026, my entire chat history disappeared. I am signed in with the same email address and sign-in method as before.

These are not chats that I deleted. They disappeared immediately after the update. The app now displays only the new chat created today.

So I lost all my chats. This means hundreds hours of work & research ! I am VERY UPSET

The new chatGPT-5/Codex is completely useless and cannot restaure anything.

Local conversation archives still exist on my Mac but cannot be restaured, which appears to indicate a synchronization or indexing issue after the update.

I recommend NOT TO UPDATE WITH CODEX

Date and time zone of the incident: July 15, 2026, Asia/Bangkok.

What steps can reproduce the bug?

?

What is the expected behavior?

?

Additional information

_No response_