A cautious starting point is to use a temporary chat, when available, for a conversation that should not remain in chat history while it is temporary. The cited help material says that a temporary chat stays out of history and is not used to improve models while it remains temporary. This is a limited protection, not a general deletion or retention rule.
Check the controls separately
The Improve the model for everyone setting should be reviewed independently from chat history. Turning it off does not delete or hide saved chats, so it should not be treated as a way to remove conversations already saved.
| What to check | Cautious starting point | What the cited statements do not establish |
|---|---|---|
| A conversation that should not remain in history while temporary | Use the temporary-chat option | What happens after it is no longer temporary |
| A conversation that should not be used for model improvement during its temporary state | Keep the temporary-chat status in place | Any guarantee beyond that temporary state |
| Chats already saved | Review saved chats and history directly | Turning off model improvement does not delete or hide them |
What still needs confirmation
The cited statements do not specify what happens when a temporary chat is no longer temporary, how long any data is retained, or how other controls interact with these features. Those points need confirmation in the current documentation and settings before temporary chat is treated as a complete privacy answer.
The supported conclusion is narrower: temporary chat addresses the stated temporary-state history and model-improvement points, while saved chats remain a separate issue.