Product Updates

September 8, 2026

Leo can build your app's stylesheet again. Since September 1 the build tool failed with a "watcher" error, and Leo blamed the hosting environment.
Leo's automatic save-points work again, so your work is committed as you go instead of silently going unsaved.
When the AI stops mid-answer, Leo switches to a different model instead of retrying the one that just stalled.
When one AI model stops working, Leo automatically switches to another one instead of showing you an error.
Sending a picture keeps working even when the image model has a problem.
The model you pick now sticks after you reload the page and after Leo starts a new chat, instead of jumping back to the standard one.
Long chats stay usable for longer. Leo now measures the conversation the way the AI model does, and sums it up using the model you are chatting with.
New AI models can be added without waiting for a software update.
Saving a recipe to your personal cookbook works again.
Leo no longer treats errors from your own browser extensions, such as password managers, as problems in your app.
Leo's building screen now suggests starting a new chat for a new topic, and tells you that you can connect your own ChatGPT account.
The "out of messages" card no longer says "free messages" to customers who are paying, and it tells you the real time your messages come back.
Clicking "Ask Leo to fix this" on an error page no longer sends the same fix request twice.

Your app now restarts itself when it stops responding, not only when it crashes outright.
Leo can run JavaScript in your page again, instead of failing silently.
Per-task backups no longer skip your databases because one file could not be read.
Visitors who are not signed in can leave feedback, when you turn that setting on.
Sending feedback with no title is now refused cleanly instead of showing an error page.
Browser-based tests can start Chromium again inside your workspace.
A retired AI model now reroutes to a working one instead of failing your turn.

Three new model choices, all of which can read images: DeepSeek V4 Flash at roughly a fifth of the cost per token, GLM 5.3 Flash with over a million tokens of context, and Qwen3.8 27B with 262k tokens of context.
Leo can look at images you upload on every workspace, not just some of them.
When you attach an image, Leo picks the right model for your workspace instead of always switching to the same one.
New models can be added from a settings file, so trying one no longer waits on a software update.
Leo's answer survives a dropped connection instead of cutting off mid-sentence.
A model that stops responding is dropped in 90 seconds instead of 10 minutes, and Leo finishes the answer on a second model.
Leo tells you when it is retrying, instead of appearing to sit still.
Your app restarts itself after a crash instead of staying down.
When Leo asks several setup questions at once, you answer them one at a time with Back and Next.
Cookbook search now includes the recipes you saved yourself, not only the public ones.
The feedback button keeps what you typed and retries if your session has timed out.
Files uploaded to the wrong folder survive an update instead of disappearing.
Fixed a sign-in failure that could happen depending on how your browser makes its first request.

Leo handles long projects better. Long chats no longer slow to a crawl or fail partway through a big build.
Leo checks that a page actually loads before telling you the work is done.
Leo runs database changes right away, so your app no longer goes down waiting for one.
When Leo edits a file, Leo confirms the change landed before saying it is finished.
If your app crashes while Leo is working, Leo now notices the crash and fixes it in the same reply.
Error messages now tell you whether the problem is in your app or in the browser.
Your app can offer passkey sign-in. People sign in with Face ID, a fingerprint, or a security key. Passkeys are off by default and work alongside passwords.
Older phones can reach your app again. Apps no longer turn away older versions of Safari, Chrome, and Samsung Internet with a "browser not supported" page, including on the sign-in screen.
Spreadsheets you upload now preview as a real grid of cells.
My Uploads opens your full file library right away, and the library can fill the screen.
Leo can ask several setup questions in one card instead of one per message.
The activity page filters down to a single person, and times show in a named time zone.
Signing in with GitHub now finishes on its own, with no refresh needed.
Your app's chat connection now requires a valid sign-in and turns away forged ones.

Discarding changes no longer deletes your work for good. Leo saves a snapshot first, and an Undo discard button restores it.
The feedback button now shows up on every page of your app, including admin pages, not only the customer-facing ones.
Fixed a bug that could block people from logging in to their app.
Page-flipping buttons in Leo-built apps are styled to match your app instead of showing as bare links.
Leo apps can read the text inside uploaded PDF documents.
Fixed a case where an update could skip refreshing your workspace's platform files.

Your app can speak more languages. Leo-built apps now include translations for Rails' built-in text — dates, number formats, and form error messages — in about 80 languages.
If a translation is missing, your app shows the English text instead of an error message.

When something goes wrong in your app's preview, Leo now sees the error itself instead of you having to describe it.
The slash-command menu opens mid-sentence, not only at the start of a message.
Pressing Enter picks the highlighted slash-command instead of sending your message.
Leo's browser-tab icon shows up correctly, even on a light browser theme.