Lex
A writing tool that thinks alongside you.
Ground Truth verdict
Reviewed by Kamran Arshad. See how we evaluate · Updated 2026-06-05.
- Type
- Writing Tool
- Category
- writing
- Starts at
- Free
- Platforms
- Web
- Launched
- Sep 2022
- Last reviewed
- 2026-06-05
The best writing-first AI editor we've used.
Lex is the writing tool that gets out of the way. Designed by writers who were tired of using ChatGPT in another tab. AI suggestions are contextual, never dominating, and the document-native UX is the right call for essayists.
What Lex actually looks like
Scroll inside the panel to see the full homepage. Live screenshot — updates as the product evolves.
Best for
- Essayists and editors
- Long-form writers
- Writers tired of chat-style AI
Not for
- Casual users wanting general AI
- Heavy collaboration needs
What it actually does
Inline AI
AI suggestions surface contextually — never dominating. Tap to expand, dismiss to keep writing.
Ask Lex
Conversational sidebar — ask questions about your draft, generate variations, research related content.
Document-native
Built around the document, not the chat. Markdown-first, distraction-free, optimized for long-form work.
Custom prompts
Save your own AI prompts as reusable tools — 'check for clarity', 'find weak verbs', 'rewrite as the New Yorker'.
Multi-model
Switch between GPT-5, Claude, and Gemini per task. Pick the model for the writing problem.
What's new from Lex
- Feb 2026
Multi-model selection
Per-task model switching. Different models for different writing problems.
- Sep 2025
Lex 2.0
Major redesign. Document-native, distraction-free, optimized for long-form work.
Composite of editorial review, hands-on testing, and reader-reported value. Each sub-score is rated 0–5 against Ground Truth's published criteria.
- Overall
- 4.3/5
- Output quality
- 4.3/5
- Utility & features
- 4.3/5
- Usability & UX
- 4.3/5
- Performance & reliability
- 4.3/5
- Cost vs. value
- 4.3/5
What it costs, by tier
- Unlimited documents
- Basic AI features
- Standard models
Serious writers.
- GPT-5 + Claude 4.5 access
- Advanced AI suggestions
- Collaboration
- Custom prompts
Per seat.
- Everything in Pro
- Team workspaces
- Shared prompt library
Ready to try Lex?
There's a real free tier — you can test the verdict yourself in five minutes.
Outbound link may be tracked. See affiliate disclosure.