Model Comparison
o3-pro
vs. Gemini 3.1 Pro Preview
Comparing 2 AI models · 7 benchmarks · OpenAI, Google
Recommended Pick
Go Gemini 3.1 Pro Preview 10 metric wins Strongest on: Value, Input price, Output price
Best Value
Gemini 3.1 Pro Preview
100.0 value score
65.3 reasoning / $4.50/1M
Lowest Price
Gemini 3.1 Pro Preview
$2.00/1M input price
Best Reasoning
Gemini 3.1 Pro Preview
65.3 reasoning score
Blends available reasoning benchmarks
Best for Coding
Gemini 3.1 Pro Preview
55.5 coding index
Composite Indices
Higher is better; speed and price are normalized
Standard Benchmarks
Only benchmarks with data are shown
Differences That Matter
Best value
Gemini 3.1 Pro Preview has the strongest quality-to-price mix at 100.0 out of 100 value points.
Price gap
Gemini 3.1 Pro Preview is 10x cheaper on input tokens than o3-pro.
Speed gap
Gemini 3.1 Pro Preview generates about 3.8x as many tokens per second as o3-pro.
Reasoning gap
Gemini 3.1 Pro Preview leads o3-pro by 2.7 points on reasoning.
Top-pick rationale
Gemini 3.1 Pro Preview wins 10 measurable categories, including Value, Input price, Output price, Blended price.
Response Face-Off
Run one prompt through the selected models and compare response quality with live speed and cost context.
o3-pro
OpenAI
TTFT
—
Time
—
tok/s
—
Tokens
—
Cost
—
Gemini 3.1 Pro Preview
TTFT
—
Time
—
tok/s
—
Tokens
—
Cost
—
Which answer was more useful?
Full Comparison
| Metric | Op o3-pro | Top Pick Go Gemini 3.1 Pro Preview |
|---|---|---|
| Pricing per 1M tokens | ||
| Input Cost | $20.00/1M | $2.00/1M |
| Output Cost | $80.00/1M | $12.00/1M |
| Blended (3:1) | $35.00/1M | $4.50/1M |
| Specifications | ||
| Organization | OpenAI | |
| Release Date | Jun 10, 2025 | Feb 19, 2026 |
| Performance & Speed | ||
| Throughput | 33.2 tok/s | 126.8 tok/s |
| TTFT | 66817ms | 21681ms |
| Latency | 66817ms | 21681ms |
| Composite Indices | ||
| Value Score | 12.3 | 100.0 |
| Reasoning Score | 62.6 | 65.3 |
| Intelligence | 40.7 | 57.2 |
| Coding | — | 55.5 |
| Standard Benchmarks | ||
| GPQA | 84.5% | 94.1% |
| HLE | — | 44.7% |
| SciCode | — | 58.9% |
| LCR | — | 72.7% |
| IFBench | — | 77.1% |
| TAU-bench v2 | — | 95.6% |
| TerminalBench Hard | — | 53.8% |
Key Takeaways
Gemini 3.1 Pro Preview offers the best value at $2.00/1M, making it ideal for high-volume applications and cost-conscious projects.
Gemini 3.1 Pro Preview has the strongest reasoning profile with a 65.3 reasoning score, combining the available reasoning-heavy benchmarks.
Gemini 3.1 Pro Preview reaches a 55.5 coding index, making it the top choice for software development and code generation tasks.
All models support context windows of ∞+ tokens, suitable for processing lengthy documents and maintaining extended conversations.
When to Choose Each Model
o3-pro
- General-purpose AI
- Versatile applications
Gemini 3.1 Pro Preview
- Cost-sensitive applications
- High-volume processing
- Complex reasoning tasks
- Research & analysis
- Code generation
- Software development
