Key Takeaways
Gemini 3 Flash Preview wins:
- Cheaper input tokens
- Cheaper output tokens
- Larger context window
- Faster response time
- Better at coding
GPT-5.1-Codex wins:
- Higher intelligence benchmark
- Better at math
Price Advantage
Gemini 3 Flash Preview
Benchmark Advantage
GPT-5.1-Codex
Context Window
Gemini 3 Flash Preview
Speed
Gemini 3 Flash Preview
Pricing Comparison
Benchmark Comparison
Context & Performance
Capabilities
Feature Comparison
| Feature | Gemini 3 Flash Preview | GPT-5.1-Codex |
|---|---|---|
Vision (Image Input) | ||
Tool/Function Calls | ||
Reasoning Mode | ||
Audio Input | ||
Audio Output | ||
PDF Input | ||
Prompt Caching | ||
Web Search |
License & Release
| Property | Gemini 3 Flash Preview | GPT-5.1-Codex |
|---|---|---|
| License | Proprietary | Proprietary |
| Author | OpenAI | |
| Released | Dec 2025 | Nov 2025 |
Gemini 3 Flash Preview Modalities
Input
textimagefileaudiovideo
Output
text
GPT-5.1-Codex Modalities
Input
textimage
Output
text