Key Takeaways
Gemini 3.1 Pro Preview wins:
- Cheaper output tokens
- Larger context window
- Faster response time
- Higher intelligence benchmark
- Better at coding
GPT-5.2-Codex wins:
- Cheaper input tokens
Price Advantage
Gemini 3.1 Pro Preview
Benchmark Advantage
Gemini 3.1 Pro Preview
Context Window
Gemini 3.1 Pro Preview
Speed
Gemini 3.1 Pro Preview
Pricing Comparison
Benchmark Comparison
Context & Performance
Capabilities
Feature Comparison
| Feature | Gemini 3.1 Pro Preview | 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 | Gemini 3.1 Pro Preview | GPT-5.2-Codex |
|---|---|---|
| License | Proprietary | Proprietary |
| Author | OpenAI | |
| Released | Feb 2026 | Jan 2026 |
Gemini 3.1 Pro Preview Modalities
Input
audiofileimagetextvideo
Output
text
GPT-5.2-Codex Modalities
Input
textimage
Output
text