GPT-5.2 o1 vs Opus 4.5
A detailed comparison to help you choose the right AI tool for your needs.
Feature Comparison
Feature
GPT-5.2 o1
Opus 4.5
Ratings
Overall Rating
4.9
4.9
Coding
4.8
5.0
Writing
4.5
4.8
Reasoning
5.0
4.9
Speed
3.8
4.2
Value
4.0
4.5
Pricing
Monthly Price
$200
$20
Free Tier
Input (per 1M tokens)
$15
$5
Output (per 1M tokens)
$60
$25
Features
Context Window
128K
200K
Vision/Images
Audio
Video
Code Generation
AI Agents
GPT-5.2 Thinking
Pros
- Best reasoning model from OpenAI
- Edges out Gemini 3 and Claude Opus 4.5 on most tests
- Performs at/above human expert level on GDPval
- Excellent for coding, math, and document analysis
- State-of-the-art on SWE-Bench Pro
Cons
- Expensive ($200/mo for Pro subscription)
- Slower than Instant variant
- Requires Pro subscription for full access
- Writing can feel robotic
Claude Opus 4.5
Pros
- Best coding model available (80.9% SWE-bench)
- Excellent for autonomous agents
- Effort parameter allows speed/quality tradeoff
- 76% fewer tokens than Sonnet at same quality
- Strong at long-horizon tasks
Cons
- More expensive than Sonnet
- Slower on simple tasks
- Requires Claude Pro/Max subscription for full access
Choose GPT-5.2 o1 if you need:
Complex reasoning, software engineering, research, math proofs
Choose Opus 4.5 if you need:
Professional developers, complex codebases, autonomous agents
Ready to get started?
Both tools offer free tiers or trials. Try them out and see which one works best for your workflow.