Model Comparison
o3-mini
vs. Gemini 3.1 Pro Preview
Comparing 2 AI models · 11 benchmarks · OpenAI, Google
Recommended Pick
Go Gemini 3.1 Pro Preview 8 metric wins Strongest on: Reasoning, Intelligence, Coding
Best Value
o3-mini
100.0 value score
56.7 reasoning / $1.93/1M
Lowest Price
o3-mini
$1.10/1M 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
o3-mini has the strongest quality-to-price mix at 100.0 out of 100 value points.
Price gap
o3-mini is 1.8x cheaper on input tokens than Gemini 3.1 Pro Preview.
Speed gap
o3-mini generates about 1.4x as many tokens per second as Gemini 3.1 Pro Preview.
Reasoning gap
Gemini 3.1 Pro Preview leads o3-mini by 8.6 points on reasoning.
Coding gap
Gemini 3.1 Pro Preview leads o3-mini by 37.6 points on coding.
Response Face-Off
Run one prompt through the selected models and compare response quality with live speed and cost context.
o3-mini
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-mini | Top Pick Go Gemini 3.1 Pro Preview |
|---|---|---|
| Pricing per 1M tokens | ||
| Input Cost | $1.10/1M | $2.00/1M |
| Output Cost | $4.40/1M | $12.00/1M |
| Blended (3:1) | $1.93/1M | $4.50/1M |
| Specifications | ||
| Organization | OpenAI | |
| Release Date | Jan 31, 2025 | Feb 19, 2026 |
| Performance & Speed | ||
| Throughput | 189.6 tok/s | 133.5 tok/s |
| TTFT | 5714ms | 33152ms |
| Latency | 5714ms | 33152ms |
| Composite Indices | ||
| Value Score | 100.0 | 49.3 |
| Reasoning Score | 56.7 | 65.3 |
| Intelligence | 25.9 | 57.2 |
| Coding | 17.9 | 55.5 |
| Standard Benchmarks | ||
| GPQA | 74.8% | 94.1% |
| MMLU Pro | 79.1% | — |
| HLE | 8.7% | 44.7% |
| LiveCodeBench | 71.7% | — |
| MATH 500 | 97.3% | — |
| AIME (Original) | 77.0% | — |
| SciCode | 39.9% | 58.9% |
| LCR | — | 72.7% |
| IFBench | — | 77.1% |
| TAU-bench v2 | 28.7% | 95.6% |
| TerminalBench Hard | 6.8% | 53.8% |
Key Takeaways
o3-mini offers the best value at $1.10/1M, 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-mini
- Cost-sensitive applications
- High-volume processing
Gemini 3.1 Pro Preview
- Complex reasoning tasks
- Research & analysis
- Code generation
- Software development
