How much does Lex cost?

Lex uses a freemium model with a free tier for casual use. Lex Pro is a paid subscription with a non-public price, and a Teams add-on is available for shared folders. Specific pricing details are hidden behind a signup or email request.

What AI models does Lex use?

Lex utilizes a multi-model approach, including GPT-4.1 and Claude. Access to these frontier models is unlocked with the Lex Pro subscription, which also provides early features and priority support for professional writers and teams.

Is there a public API for Lex?

No, there is no public API available for Lex. The tool is designed as a browser-based document editor for direct human interaction, not for programmatic content pipelines or automated integration into other software systems.

Does Lex support team collaboration?

Yes, Lex supports live collaboration, comments, and version history. A Teams add-on enables shared folders for group work. The platform is designed for professional writers, editors, and teams who need AI assistance within a familiar document interface.

What are the main use cases for Lex?

Lex is best for long-form drafting, editorial feedback, collaborative writing, brainstorming, and AI rewriting. It allows users to invoke AI commands on text selections or the whole document to rewrite, critique, continue, or fact-check passages without leaving the page.

Lex

Google Docs-style writing app with an LLM sidekick wired into every sentence.

Freemium· Free tier; Lex Pro paid (price not public); Teams add-onWritingMulti-model (GPT-4.1, Claude)6.8 / 10

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In short

Lex is a browser-based writing app that combines a Google Docs-like interface with built-in AI for drafting, editing, and brainstorming. It supports live collaboration and offers a free tier plus paid Pro and Teams options.

Best for

Pick Lex if you live in long-form prose and want a Google Docs replacement where an LLM is one keystroke away from every paragraph.

Skip if

Skip it if you need an API, programmatic content pipelines, or a transparent enterprise pricing sheet before you'll evaluate.

Lex is a browser-based document editor that looks and feels like Google Docs but bakes in AI commands for drafting, brainstorming, line-level feedback, and title generation. You write in a clean minimal canvas, and a chat-style assistant can be invoked on a selection or the whole document to rewrite, critique, continue, or fact-check passages without leaving the page.

The pitch is for professional writers, editors, and teams who want AI help without learning a new interface or piping prose between tabs. Pro unlocks access to frontier models (GPT-4.1, Claude, and others) plus early features and priority support; a free tier covers casual use, and a Teams add-on enables shared folders. Lex claims 300,000+ writers and name-checks Google, Microsoft, Harvard, Stanford, the New York Times, and BuzzFeed among its users.

Live collaboration, comments, version history, and read-only publish links round out the document-app fundamentals, and Track Changes is on the roadmap. There's no public API, no self-host option, and pricing detail is mostly hidden behind a signup or email request, which makes procurement a touch awkward for larger teams.

Editor's take

Lex is one of the more tasteful AI writing apps because it respects the document-first workflow instead of forcing you into a chat panel. The multi-model Pro tier is genuinely useful, but the coyness around pricing and the missing API ceiling its appeal for teams that want to standardize on it.

— The AI Tool Bible editorial team

Pros

✅ Familiar Google Docs-style editor with AI woven in, not bolted on
✅ Multi-model access (GPT-4.1, Claude) on the Pro plan
✅ Real-time collaboration, comments, versioning, and publish links
✅ Adopted by serious newsrooms and universities, not just hobbyists

Cons

⚠️ Pricing is not transparently published on the site
⚠️ No public API or self-hosted option
⚠️ Track Changes still listed as 'coming soon'
⚠️ Thin disclosure about which model handles which task

Use cases

long-form draftingeditorial feedbackcollaborative writingbrainstormingai rewriting

Frequently asked

How much does Lex cost?: Lex uses a freemium model with a free tier for casual use. Lex Pro is a paid subscription with a non-public price, and a Teams add-on is available for shared folders. Specific pricing details are hidden behind a signup or email request.
What AI models does Lex use?: Lex utilizes a multi-model approach, including GPT-4.1 and Claude. Access to these frontier models is unlocked with the Lex Pro subscription, which also provides early features and priority support for professional writers and teams.
Is there a public API for Lex?: No, there is no public API available for Lex. The tool is designed as a browser-based document editor for direct human interaction, not for programmatic content pipelines or automated integration into other software systems.
Does Lex support team collaboration?: Yes, Lex supports live collaboration, comments, and version history. A Teams add-on enables shared folders for group work. The platform is designed for professional writers, editors, and teams who need AI assistance within a familiar document interface.
What are the main use cases for Lex?: Lex is best for long-form drafting, editorial feedback, collaborative writing, brainstorming, and AI rewriting. It allows users to invoke AI commands on text selections or the whole document to rewrite, critique, continue, or fact-check passages without leaving the page.