AI Tool Comparison

Lex vs ChatGPT

An objective side-by-side comparison based on global rankings, AI scores, and monthly user data.

Lex logo

Lex

Writing & Chat

AI-native word processor for writers built on GPT models.

AI Score66.5 / 100

#253

Global Rank

–

Monthly Users

Visit LexFull Profile
VS
Higher Ranked
ChatGPT logo

ChatGPT

Writing & Chat

The world's most popular AI chatbot for writing, coding, research, and everyday tasks.

AI Score97.4 / 100

#3

Global Rank

400M+

Monthly Users

Visit ChatGPTFull Profile

Side-by-Side Comparison

LexChatGPT
CategoryWriting & ChatWriting & Chat
Global Rank#253#3
AI Score66.5/10097.4/100
Monthly Users–400M+
PricingFreemiumFreemium
Websitelex.pagechat.openai.com

Pros & Cons

Lex

  • Genuinely simple pricing structure (free or one paid tier) compared to complex multi-tier competitors
  • Free tier’s 30 AI checks/month with multi-model access is usable for light writing needs
  • Pro plan includes a money-back guarantee for risk-free evaluation
  • Reported Pro pricing varies across sources ($14.99-$24.99/month) — verify the current rate directly
  • Free tier’s 30 AI checks/month may be limiting for heavier writing workflows
  • Premium AI models require upgrading to the Pro plan

ChatGPT

  • Largest user base and ecosystem of any AI assistant, with the most third-party integrations
  • Genuinely broad capability across writing, coding, research, and file analysis
  • Custom GPTs allow tailoring the assistant to specific repeated tasks
  • Frequent model updates keep it competitive on raw capability
  • Free tier has usage limits and access to a lower-tier model than paid plans
  • Can produce confident-sounding but incorrect information, especially without browsing enabled
  • Breadth can mean less depth than a tool purpose-built for one specific workflow
  • Data usage and training policies require attention for sensitive or regulated work