GPT-5
OpenAI’s most advanced model
Lex
AI-powered word processor, to help you write faster
Updated February 2026
| GPT-5 | Lex | |
|---|---|---|
| Rating | 5.0★ | 4.5★ |
| Reviews | 19 | 13 |
| Pros | 9 | 10 |
| FactScore™ | 65.1 | 51.1 |
FactScore™ Comparison
FactScore™ weighs both quality (rating) and popularity (reviews) for a fairer ranking than stars alone.
Pros & Cons
Only in GPT-5 — Pros
AI assistant AI integration Actionable insights High-quality output Developer experience Time-saving Context aware Frequent updates High accuracyBoth tools — Pros
—Only in Lex — Pros
Easy to use User-friendly interface Writing assistance Focus on writing Improves writing skills Active feedback/roadmap updates AI autocomplete Built-in search Headline generation Minimalistic designOnly in GPT-5 — Cons
Slow performanceBoth tools — Cons
—Only in Lex — Cons
Confusing design choices Lack of guidance Limited editing capabilities No automatic exportDetails
| GPT-5 | Lex | |
|---|---|---|
| Categories | LLMs, Foundation Models | LLMs, AI Chatbots, Writing assistants |
| Platforms | Web | Web |
| Became Popular | August 7, 2025 | October 17, 2022 |
| Website | openai.com | lex.page |
Who Should Pick Which?
Choose GPT-5 if...
- AI assistant
- AI integration
- Actionable insights
Choose Lex if...
- Easy to use
- User-friendly interface
- Writing assistance
With a FactScore™ of 65.1 vs 51.1, GPT-5 leads in community reception. GPT-5 uniquely offers AI assistant and AI integration, while Lex stands out for Easy to use and User-friendly interface.
What Users Say
GPT-5
We spent months developing the new version of Tellers.AI, betting that foundation models would excel at long-form, structured outputs with native tool use. GPT-5 did not disappoint; it proved to be...
As user study, pray, and achieve milestones, GPT-5 helps the pet reflect that progress through both words and actions, making the experience more meaningful. We also use GPT-5 to offer context-rich...
The Basedash data agent is powered by GPT-5. It allows us to ask incredibly complex questions and get genuine insights out of any data.
Lex
I mainly use this to get me started on written content, and the +++ command is super intuitive. The AI assistant is a tad unintuitive. It can't yet make changes to your writing, or export your doc ...
Wow! I'm testing Lex this morning. I copy-pasted the first two paragraphs of a post I wrote to see what Lex would do… To say that I'm impressed is an understatement 🤯 I haven't been excited like t...
In my opinion, Lex.page is a powerful tool that can help writers streamline their writing process and produce high-quality content. Lex provides a clean and user-friendly interface for writing and ...
Related Comparisons
Frequently Asked Questions
Which is better, GPT-5 or Lex?
Based on FactScore™, GPT-5 leads with a score of 65.1 vs 51.1. GPT-5 has a higher rating of 5.0★ compared to 4.5★.
What are the pros of GPT-5 compared to Lex?
GPT-5 uniquely offers: AI assistant, AI integration, Actionable insights, High-quality output, Developer experience.
What are the pros of Lex compared to GPT-5?
Lex uniquely offers: Easy to use, User-friendly interface, Writing assistance, Focus on writing, Improves writing skills.
Is GPT-5 better rated than Lex?
GPT-5 is rated 5.0★ from 19 reviews. Lex is rated 4.5★ from 13 reviews.
What is the FactScore™ of GPT-5 and Lex?
FactScore™ weighs rating and review volume together. GPT-5 scores 65.1 and Lex scores 51.1.
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