Upgrade to Pro
Unlock the full power of our critical thinking tools
AI Model Upgrade
Free
Claude Sonnet
Fast, capable analysis for quick checks
Pro
Claude Opus
Most advanced reasoning for deeper insights
Claude Opus excels at identifying subtle fallacies, understanding nuanced arguments, and providing more thoughtful improvement suggestions.
Everything You Get
10,000+ character limit
Analyze full articles, essays, and speeches
Improvement suggestions
Learn how to restate arguments without fallacies
Writing Lab access
Write essays and analyze them for fallacies, with unlimited documents
PDF upload
Upload documents for instant analysis
Export results
Download analysis as PDF or Markdown
Unlimited quizzes
No daily limits on practice quizzes
Compare Plans
| Free | Pro | |
|---|---|---|
| AI Model | Claude Sonnet | Claude Opus |
| Character Limit | 1,500 | 10,000+ |
| Fallacy Finder | Basic analysis | Deep analysis + suggestions |
| Bias Checker | Basic analysis | Deep analysis + suggestions |
| Daily Quizzes | 3 per day | Unlimited |
| Writing Lab | 1 document, 750 words | Unlimited, 10k+ words |
| PDF Upload | - | Included |
| Export | - | PDF & Markdown |