Lexeme – Open Source ChatGPT Text Editor

Lexeme is an open-source text editor with deep ChatGPT integration, inspired by the SQL Workbench interface. It’s designed to keep drafting and AI-assisted editing in a single workspace, so you don’t have to switch between a browser chat and a separate editor.

ChatGPT inside the editor

Lexeme turns ChatGPT into a practical copilot for writing and editing tasks. You can work with the model while staying in your document.

• Ask questions as you write
• Improve tone and style
• Simplify wording and clarify phrasing
• Rewrite specific passages without leaving the editor

Selective context for targeted rewrites

A key feature is “selective context”: Lexeme sends only the text you highlight to the model, not the entire document. This is useful when you want to revise a single sentence or a small section without affecting surrounding paragraphs—select the fragment and continue the AI conversation with that focused context.

Who it’s for

Lexeme is a good fit for people who frequently revise text and want tighter control over what the AI sees.

• Authors and editors
• Technical writers
• Students
• Developers who want to customize or extend an open-source editor