OpenAI shuts down Prism on January 1, 2027 and deletes every project after that date. How to export and move your projects
LetX vs PrismThe fast, private
Prism alternative
OpenAI is shutting down Prism on January 1, 2027, and says every Prism project is deleted after that date. LetX is a collaborative LaTeX editor in the browser with real-time editing, an AI assistant that reads your compile log, and 1000+ templates. Export all your Prism projects as one zip and LetX imports every one of them in a single step.
OpenAI's own migration guide points Prism users to Codex, which works on the files in a folder on your computer and has no shared editor. LetX keeps what Prism gave a team: one live document everyone edits, in the browser, with nothing to install.
Keep every project when Prism closes
Export from Prism before January 1, 2027: open Settings, then Data Controls, and choose Export all projects. In LetX, choose New Project, then Import several projects, and pick that zip. LetX finds every project inside, lets you rename them, and imports them one after another, keeping your folders and choosing each project’s main file. Your files come across; Prism’s history, comments and sharing settings are not in its export, so invite your co-authors again in LetX.
Frequently asked questions
Is OpenAI shutting down Prism?
Yes. OpenAI shuts Prism down on January 1, 2027 and says all Prism data is deleted after that date and cannot be recovered. Export your projects before then.
How do I export all my Prism projects?
In Prism, open Settings, then Data Controls, and choose Export all projects (zip). A single project can be exported from its title menu with Export (zip). If an export fails, OpenAI suggests checking export-errors.json and exporting that project on its own.
Can I import my Prism export into LetX?
Yes, all of it at once. In LetX, choose New Project, then Import several projects, and pick the zip Prism gave you. LetX lists every project it found, lets you rename them, and imports them one by one. You can also choose several project zips together, for example from Overleaf.
What comes across from Prism, and what does not?
Every file and folder of each project comes across, and LetX picks each project’s main file. Prism’s version history, comments and collaborator settings are not part of its export, so invite your co-authors again once the projects are in LetX.
What is the best free alternative to OpenAI Prism?
LetX is a free real-time collaborative LaTeX editor in the browser, with unlimited collaborators, an AI assistant that reads the compile log, and 1000+ templates. It never uses your work to train AI, and it imports every project from a Prism export in one step.
Is LetX faster than Prism?
LetX compiles a typical LaTeX document in a few seconds end to end, queue included, using latexmk on dedicated cloud workers. OpenAI does not publish compile times for Prism, and nobody has run a like-for-like benchmark, so treat any claim to be faster with care.
Does LetX use my documents to train AI?
No. Your documents are never used to train AI, and you decide when the AI in LetX runs. LetX is independent and not part of the OpenAI ecosystem.
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Fast compiles, real-time collaboration, and your work stays yours.