- Type
- Official product documentation
- Publication
- ChatGPT Learn
- Version used
- Documentation accessed 24 October 2026
- Source date
- 24 October 2026
- Recorded in Atlas
- 24 October 2026
- License
- Atlas paraphrase; no source figure reproduced.
Access date used for this evolving documentation; original publication date not established. No separate validity period has been established for the finding.
How Atlas uses this source
Keep Codex on track
Existing chats retain their conversation history while working against project files. File checkpoints supplement that mechanism.
Open the source passageSupports this claim:A resumed chat and a file checkpoint serve different purposes