Two ways to stop your AI from forgetting everything. We tested both on the same project packet.
Project workspace with files & shared memory
WinnerCross-chat personalization
Claude Projects wins for deep, document-heavy work. In our test it answered 9 of 10 cross-document questions correctly and kept its answers identical across two separate chats, because your files live inside the project. ChatGPT Memory wins for lightweight personalization — it quietly remembers your preferences across every chat with zero setup. Choose Claude Projects if you do research, coding, or client work; choose ChatGPT Memory if you want the assistant to just "know you" everywhere.
We assembled a 4-document project packet — a product spec, a messy meeting transcript, a code snippet, and a style guide — and asked each tool to (a) draft a project brief, (b) answer a question requiring cross-document reasoning, and (c) stay consistent across two separate chats. Tool A is Claude Projects, Tool B is ChatGPT Memory.
| Metric | Claude Projects | ChatGPT Memory |
|---|---|---|
| Cross-document answer accuracy (of 10) | 9 / 10 | 6 / 10 |
| Needed re-upload of files each chat | No (persistent) | Yes |
| Personalization across all chats | Per-project only | Yes, everywhere |
| Consistency across 2 separate chats | Consistent | Drift noted |
| Setup time | ~4 min (add docs) | Instant |
| Overall verdict | Winner | Runner-up |
Side-by-side breakdown across key categories
| Feature | Claude Projects | ChatGPT Memory | Winner |
|---|---|---|---|
| What it is | Per-project workspace with files & instructions | Cross-chat personalization layer | Depends |
| Ingests large file sets | Yes (project knowledge) | Limited (memory notes) | Claude Projects |
| Works across all your chats | No (scoped to project) | Yes | ChatGPT Memory |
| Best at | Deep document & code work | Remembering your preferences | Split |
| Team sharing | Yes (shareable projects) | No | Claude Projects |
| Privacy controls | Project-level, deletable | Memory on/off, deletable | Tie |
| Price to use the feature | Free + Pro $20/mo | Free + Plus $20/mo | Tie |
| Overall | Best for deep work | Best for personalization | Claude Projects |
ChatGPT: Free ($0) with limited Memory; Plus $20/mo; Pro $200/mo. Memory is available on free and paid tiers, with the paid tiers raising how much it retains.
Claude: Free ($0) with Projects; Pro $20/mo; Max $100–200/mo. Projects are included on free and paid tiers, with paid plans raising file and message limits.
Both include the feature on their free tiers with usage caps, so you can test the workflows above without paying. The paid plans mainly raise limits, not the core capability.
Both features attack the same pain — "the model forgot what I told it" — but in opposite directions. Claude Projects is a filing cabinet you open per project; ChatGPT Memory is a notebook the model carries everywhere. For most knowledge work, the filing cabinet wins because recall stays anchored to your actual files.
Claude Projects — file-grounded answers, no drift.
ChatGPT Memory — knows your style everywhere.
Tie — both work on free tiers with caps.
Claude Projects — shareable workspaces.
Both are free to start — drop your own spec into a Claude Project and a ChatGPT chat, then compare how each recalls it a week later.
Still deciding? Check out these related comparisons and best-of guides.