Key Takeaways
Mercury 2 wins:
- Cheaper input tokens
- Cheaper output tokens
- Faster response time
GPT-5.2-Codex wins:
- Larger context window
- Higher intelligence benchmark
- Better at coding
- Supports vision
- Has reasoning mode
Price Advantage
Mercury 2
Benchmark Advantage
GPT-5.2-Codex
Context Window
GPT-5.2-Codex
Speed
Mercury 2
Pricing Comparison
Benchmark Comparison
Context & Performance
Capabilities
Feature Comparison
| Feature | Mercury 2 | GPT-5.2-Codex |
|---|---|---|
Vision (Image Input) | ||
Tool/Function Calls | ||
Reasoning Mode | ||
Audio Input | ||
Audio Output | ||
PDF Input | ||
Prompt Caching | ||
Web Search |
License & Release
| Property | Mercury 2 | GPT-5.2-Codex |
|---|---|---|
| License | Open Source | Proprietary |
| Author | Inception | OpenAI |
| Released | Mar 2026 | Jan 2026 |
Mercury 2 Modalities
Input
text
Output
text
GPT-5.2-Codex Modalities
Input
textimage
Output
text