Key Takeaways
Gemini 3 Pro Preview wins:
- Larger context window
- Faster response time
- Higher intelligence benchmark
- Better at coding
- Better at math
o3 wins:
- Cheaper output tokens
Price Advantage
o3
Benchmark Advantage
Gemini 3 Pro Preview
Context Window
Gemini 3 Pro Preview
Speed
Gemini 3 Pro Preview
Pricing Comparison
Price Comparison
| Metric | Gemini 3 Pro Preview | o3 | Winner |
|---|---|---|---|
| Input (per 1M tokens) | $2.00 | $2.00 | Tie |
| Output (per 1M tokens) | $12.00 | $8.00 | o3 |
| Cache Read (per 1M) | $200000.00 | $500000.00 | Gemini 3 Pro Preview |
| Cache Write (per 1M) | $375000.00 | N/A | Gemini 3 Pro Preview |
Using a 3:1 input/output ratio, o3 is 22% cheaper overall.
Gemini 3 Pro Preview Providers
Google AI Studio $2.00 (Cheapest)
Google $2.00 (Cheapest)
o3 Providers
OpenAI $2.00 (Cheapest)
Vercel $2.00 (Cheapest)
Benchmark Comparison
8
Benchmarks Compared
6
Gemini 3 Pro Preview Wins
0
o3 Wins
Benchmark Scores
| Benchmark | Gemini 3 Pro Preview | o3 | Winner |
|---|---|---|---|
Intelligence Index Overall intelligence score | 48.4 | 38.3 | |
Coding Index Code generation & understanding | 46.5 | 38.4 | |
Math Index Mathematical reasoning | 95.7 | 88.3 | |
MMLU Pro Academic knowledge | 89.8 | 85.3 | |
GPQA Graduate-level science | 90.8 | 82.7 | |
LiveCodeBench Competitive programming | 91.7 | 80.8 | |
Aider Real-world code editing | - | 81.3 | - |
AIME Competition math | - | 90.3 | - |
Gemini 3 Pro Preview significantly outperforms in coding benchmarks.
Cost vs Quality
X-axis:
Y-axis:
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Gemini 3 Pro Preview
Other models
Context & Performance
Context Window
Gemini 3 Pro Preview
1,048,576
tokens
Max output: 65,536 tokens
o3
200,000
tokens
Max output: 100,000 tokens
Gemini 3 Pro Preview has a 81% larger context window.
Speed Performance
| Metric | Gemini 3 Pro Preview | o3 | Winner |
|---|---|---|---|
| Tokens/second | 132.8 tok/s | 109.7 tok/s | |
| Time to First Token | 30.65s | 20.34s |
Gemini 3 Pro Preview responds 21% faster on average.
Capabilities
Feature Comparison
| Feature | Gemini 3 Pro Preview | o3 |
|---|---|---|
| Vision (Image Input) | ||
| Tool/Function Calls | ||
| Reasoning Mode | ||
| Audio Input | ||
| Audio Output | ||
| PDF Input | ||
| Prompt Caching | ||
| Web Search |
License & Release
| Property | Gemini 3 Pro Preview | o3 |
|---|---|---|
| License | Proprietary | Proprietary |
| Author | OpenAI | |
| Released | Nov 2025 | Apr 2025 |
Gemini 3 Pro Preview Modalities
Input
textimagefileaudiovideo
Output
text
o3 Modalities
Input
imagetextfile
Output
text