Compatibility record
Does Codex support Persistent memory?
Codex can retain local memories of earlier chats for later sessions on ChatGPT Plus, Pro, Business, Enterprise, and API, but memories are off by default and region-limited.
What this state means
Supported with conditions, with the qualification kept attached.
Pricing marks Memories as region-limited on ChatGPT Plus, ChatGPT Pro, ChatGPT Business, Enterprise/Education, and API Key. Those map to seed plans ChatGPT Plus, Pro, Business, Enterprise, and API. Local memories stay off until the user enables them. Free and Go are Codex access tiers on the pricing page but are not columns in the feature matrix and are not seed plan strings.
Retains user or project context for use across separate sessions.
Saved chats, project instructions, retrieval over history, and automatically learned preferences are labeled separately in notes.
Researcher note
Path A: learn.chatgpt.com/docs (memories mechanism plus pricing feature matrix) and openai.com/index/codex-for-almost-everything (2026-04-16). The fetched pricing text header is Feature / ChatGPT Plus / ChatGPT Pro / ChatGPT Business / Enterprise / Education / API Key, and the Memories row is Limited* in all five columns. The April announcement called memory a preview and said Enterprise, Edu, and EU/UK would follow; the current matrix lists those plans as region-limited rather than absent. Education shares the Enterprise column but is not a Codex seed plan.
Evidence
Primary records behind the answer.
- 01
“After you enable memories, Codex can turn useful context from eligible prior chats into local memory files.”
- 02
“Memories Limited* Limited* Limited* Limited* Limited*”
- 03
“We're also releasing a preview of memory, which allows Codex to remember useful context from previous experience”