Sonnet 4.5 vs Grammarly
A detailed comparison to help you choose the right AI tool for your needs.
Our Pick
Claude Sonnet 4.5
Claude Sonnet 4.5 edges out Grammarly with superior overall performance and features that make it the better choice for most users.
Try Sonnet 4.5Feature Comparison
Feature
Sonnet 4.5
Grammarly
Ratings
Overall Rating
4.8
4.6
Coding
4.7
-
Writing
4.9
4.8
Reasoning
4.7
4.0
Speed
4.6
5.0
Value
4.9
4.5
Pricing
Monthly Price
$20
$12
Free Tier
Input (per 1M tokens)
$3
-
Output (per 1M tokens)
$15
-
Features
Context Window
200K
50K
Vision/Images
Audio
Video
Code Generation
AI Agents
Claude Sonnet 4.5
Pros
- Best value for money
- Excellent writing quality
- Fast response times
- Strong coding abilities
- Free tier available
Cons
- Not as powerful as Opus for complex tasks
- Usage limits on free tier
Grammarly
Pros
- Works everywhere (browser, desktop, mobile)
- Excellent grammar and spelling
- Tone detection
- Plagiarism checker
- GrammarlyGO AI assistant
Cons
- Not for creative writing
- Premium features require subscription
- Can be overly corrective
Choose Sonnet 4.5 if you need:
Daily coding tasks, writing, general use
Choose Grammarly if you need:
Grammar checking, professional emails, academic writing
Ready to get started?
Both tools offer free tiers or trials. Try them out and see which one works best for your workflow.