Product update · October 31, 2026
What Shipped in LetX in October 2026
LetX can now import a whole Prism or Overleaf library in one step, before OpenAI closes Prism on January 1, 2027. October also brought the Team plan, dark mode, Vim keys, five languages and Codex.
By Shihab Shahriar Antor · Updated 2026-10-31
Import a whole library at once
Moving to a new editor used to mean one project zip at a time. Since October 30, LetX takes a single upload holding many projects: Overleaf's download of several projects, Prism's export of a whole account, or several ordinary project zips chosen together. It lists every project it finds, lets you rename them before anything is created, then imports them one after another with their folders intact.
The same week, main-document detection got stricter. An imported project now opens on the file that really builds the document, not on a chapter that mentions \documentclass in a comment, and a file that another one pulls in with \input is not preferred as the main one. Overleaf users have their own walkthrough: how to move all your Overleaf projects at once.
| Date | Change | What it does |
|---|---|---|
| Oct 31 | Faculty templates | Departments send their thesis, report or slide template; LetX publishes it in the gallery, credited to the department. |
| Oct 31 | Open in LetX badge | A README badge that opens a public GitHub repository, or one folder of it, as a LetX project ready to compile. |
| Oct 30 | Import several projects | One upload of many Overleaf or Prism projects becomes one LetX project each. |
| Oct 30 | Quick project | A blank project in one click, with no template to pick first. |
| Oct 30 | Tags from the sidebar | Name a tag, tick the projects it goes on. |
| Oct 29 | Lexi shows only changed lines | Reviewing a Lexi edit previews and accepts only the lines it changed. |
| Oct 29 | Faster builds after typing | A build starts on what was just typed without waiting for a pause. |
| Oct 29 | Lighter public pages | The homepage downloads far less before it responds, which matters most on mid-range phones. |
| Oct 27 | Connect Codex | Codex signs in to LetX with one command, alongside Claude and ChatGPT. |
| Oct 25 | Five more languages | Spanish, Arabic (right to left), Japanese, Korean and Simplified Chinese, after French and German. |
| Oct 23 | Vim keys and shared undo | Vim keybindings, and undo that never takes back a collaborator's edit. |
| Oct 23 | Go to code from the PDF | Clicking a reference opens the .bib entry; clicking the title block goes to its source. |
| Oct 18 | A free week with Claude | Free accounts can use the LetX connector in Claude for 7 days from their first connection. |
| Oct 16 | XeLaTeX and LuaLaTeX fixes | Quick XeLaTeX builds again, and LuaLaTeX finds system fonts by name. |
| Oct 13 | Video lessons | Both Learn courses gained video lessons with chapters. |
| Oct 12 | Dark mode | Dark mode for the app and site, with editor themes, fonts and line height that follow you across devices. |
| Oct 7 | Team plan | Pro seats for 2 to 50 people on one bill, with seats you can move and an activity log. |
| Oct 7 | A separate lane for paid builds | Builds on Pro, Team and Institution plans never wait behind free ones. |
| Oct 5 | Ctrl+Enter, spell check, German | Build from the keyboard, spell check on by default, and the app in German. |
| Oct 2 | SyncTeX on the clicked word | Clicking the PDF puts the cursor on that word, in multi-file projects too. |
Selected from the LetX changelog, where every entry is a merged change that is live for users; it lists every smaller fix too. Dates are UTC merge days. A security fix to the build servers on October 15 is listed there without details.
Team, and what it costs
Team is for a lab, a research group or a class: $20 per seat a month or $200 a year, for 2 to 50 people, as listed on the LetX pricing page on October 31, 2026. The owner buys seats and gives Pro to the people who need it, and can take a seat back and hand it to someone else at any time. Everyone else still edits shared projects free, because collaborators are unlimited on every plan, including Free.
The numbers at the end of October
On October 31, 2026, the LetX statistics page counted 8,600+ registered users at 560+ universities and research labs across 70+ countries, with institutions counted from verified academic email domains rather than profile fields. In the 30 days to October 31, LetX ran 67,000+ compiles, and people have created 12,600+ projects since it opened. Those two are production counts read on October 31; the statistics page puts a typical compile at about six seconds end to end, queue included.
Beyond the editor
Three pages opened this month for people who work with LetX rather than in it. Faculty templates is how a department gets its official template into the gallery. Partners explains how deep-tech, research and AI companies can reach researchers through labelled placements that never appear inside the editor. Careers lists the roles Shahriar Labs may hire for, also listed on our careers page.
Questions
- When does OpenAI's Prism shut down?
- OpenAI shuts Prism down on January 1, 2027 and says all Prism data is deleted after that date and cannot be recovered, so projects should be exported before then.
- Can LetX import all my Prism projects at once?
- Yes. Export everything from Prism with Settings, Data Controls, Export all projects (zip). Then in LetX choose New Project, Import several projects, and pick that zip. LetX lists every project inside and imports them one after another.
- Can LetX import all my Overleaf projects at once?
- Yes. Download the projects from your Overleaf project list as one zip, then use Import several projects in LetX. Overleaf's history, comments and sharing settings are not in its download, so co-authors need to be invited again.
- How much does the LetX Team plan cost?
- $20 per seat a month or $200 per seat a year, for 2 to 50 people, as listed on October 31, 2026. Collaborators without a seat still edit shared projects free.
- Which languages does LetX support?
- English, French, German, Spanish, Arabic, Japanese, Korean and Simplified Chinese, for both the website and the app. Arabic is laid out right to left.