Long documents & batch translation

Upload a whole book; it’s split into blocks and each becomes its own translation job. You don’t have to chunk it yourself, and the document’s context still travels with every block.

Translate a selection, a page, or the whole document in one go. While a batch runs you get a progress toast with the current step, blocks done, and a live line of the model’s own thinking. Leave the document and it pauses cleanly; come back and it resumes — nothing is lost, even across a reload.

Batch translation is on Starter and Pro.

On documents longer than about ten pages, the batch dialog offers a Large-parallel mode toggle, at the top next to the cost. Instead of translating front-to-back, it runs several agents at once, so a long document finishes faster.

To keep the parts consistent, the agents share a glossary and style guide that the run builds as it goes: before each group of pages, a strong (Pro) model reads them and updates the shared terms and style, then those pages translate in parallel against the same decisions. The parts can’t drift, because the key choices are made once and shared — and you can review them afterwards.

Large-parallel mode is a Pro-plan feature, offered only on long documents. Proofreading has its own parallel mode too: several agents proofread at once, each building on the previous pages’ notes — at no extra cost.

Your translation bills at the model’s normal rate, exactly as a regular run. On top of that, building the shared glossary and style guide is billed as one extra Pro request for roughly every four pages — and only when a pass actually changes something.

Because the exact number of changes isn’t known up front, the dialog shows the cost as a range: the low end is the translation on its own, the high end adds the reconciliation passes. The run sets aside the high end and refunds whatever it doesn’t use, so you’re only charged for what actually happens.

The shared glossary and style guide the run builds are saved as “AI sync — your document” resources, marked with an AI generated badge. When the run finishes, an “AI sync ready for review” prompt appears — click it to go straight into the review. You can also start it any time from the AI sync rows in the document’s sidebar (the Review button on the Glossary and Style tabs), or from your Glossaries and Styleguides pages.

The review itself is quick: accept or reject each glossary term, then either keep the glossary as its own or merge the accepted terms into one of your existing glossaries. For the style guide you can preview an AI-suggested merge into another style guide — the AI sync on the left, the merged result on the right — or simply save it as its own.

Until you review it, an AI sync stays attached to its own document: it won’t clutter the glossary or style-guide lists in your other documents. Once reviewed, it becomes an ordinary glossary or style guide (or folds into the one you chose), and the next parallel run on that document builds a fresh one.