Lex capabilities

AI proofreading pass that scans a document and flags line-level issues such as grammar, brevity, cliches, readability, passive voice, confidence, and repetition, with one-click accept/reject suggestions.

One-click generation of a list of candidate titles for the current document from the AI.

Conversational AI assistant that gives feedback on a draft, brainstorms ideas, or rewrites passages, invoked inline or by tagging the AI in a comment on selected text.

Handy inline AI shortcuts for common writing micro-tasks such as finding the best word, generating a list of ideas, and continuing the draft from where you left off.

A team add-on that gives a group shared document folders and shared custom AI prompts, on top of each member's Lex account.

Choice of underlying large language model for AI features, with a basic model set on the free plan and premium frontier models unlocked on Pro.

A free tier metered by a monthly cap on AI checks with basic models, and a flat-rate Pro subscription that removes the cap and unlocks premium models, plus a Teams add-on for groups.

Reusable, customizable AI prompts for Ask Lex and Checks that users can author, save, and reuse, plus a public Prompt Library of curated writing prompts to install.

Generate a shareable read-only link so others can read a finished piece without being able to edit it.

Shared documents where multiple people edit live and see each other typing, with a commenting system and link-based access that works in the browser without an app.

Document version control that lets a writer try a different phrasing without losing the original text, and revisit earlier states of a document.