GPT-5.2 vs Grammarly
A detailed comparison to help you choose the right AI tool for your needs.
Our Pick
GPT-5.2 Instant
GPT-5.2 Instant edges out Grammarly with superior overall performance and features that make it the better choice for most users.
Try GPT-5.2Feature Comparison
Feature
GPT-5.2
Grammarly
Ratings
Overall Rating
4.8
4.6
Coding
4.6
-
Writing
4.8
4.8
Reasoning
4.7
4.0
Speed
4.9
5.0
Value
4.7
4.5
Pricing
Monthly Price
$20
$12
Free Tier
Input (per 1M tokens)
$2.5
-
Output (per 1M tokens)
$10
-
Features
Context Window
128K
50K
Vision/Images
Audio
Video
Code Generation
AI Agents
GPT-5.2 Instant
Pros
- Newest OpenAI model (Dec 2025)
- Fast responses optimized for speed
- 30% fewer hallucinations than GPT-5.1
- Knowledge cutoff August 2025
- Better at spreadsheets and presentations
- Matches human experts on professional tasks
Cons
- Not as strong as Thinking variant for complex tasks
- Requires paid subscription for full access
- Coding not as strong as Claude Opus 4.5
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 GPT-5.2 if you need:
Daily tasks, writing, translation, quick coding help
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.