Sonnet 4.5 vs GPT-5.2
A detailed comparison to help you choose the right AI tool for your needs.
Feature Comparison
Feature
Sonnet 4.5
GPT-5.2
Ratings
Overall Rating
4.8
4.8
Coding
4.7
4.6
Writing
4.9
4.8
Reasoning
4.7
4.7
Speed
4.6
4.9
Value
4.9
4.7
Pricing
Monthly Price
$20
$20
Free Tier
Input (per 1M tokens)
$3
$2.5
Output (per 1M tokens)
$15
$10
Features
Context Window
200K
128K
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
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
Choose Sonnet 4.5 if you need:
Daily coding tasks, writing, general use
Choose GPT-5.2 if you need:
Daily tasks, writing, translation, quick coding help
Ready to get started?
Both tools offer free tiers or trials. Try them out and see which one works best for your workflow.