Model Comparison
o3-pro
vs. Phi-3 Mini Instruct 3.8B
Comparing 2 AI models · 12 benchmarks · OpenAI, Microsoft
Recommended Pick
Opo3-pro4 metric winsStrongest on: Throughput, Reasoning, Intelligence
Lowest Price
Phi-3 Mini Instruct 3.8B
$0.00/1M input price
Best Reasoning
o3-pro
58.5 reasoning score
Blends available reasoning benchmarks
Composite Indices
Higher is better; speed and price are normalized
Standard Benchmarks
Only benchmarks with data are shown
Differences That Matter
Price gap
Phi-3 Mini Instruct 3.8B is ∞x cheaper on input tokens than o3-pro.
Reasoning gap
o3-pro leads Phi-3 Mini Instruct 3.8B by 45.5 points on reasoning.
Top-pick rationale
o3-pro wins 4 measurable categories, including Throughput, Reasoning, Intelligence, GPQA.
Response Face-Off
Run one prompt through the selected models and compare response quality with live speed and cost context.
o3-pro
OpenAI
TTFT
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Time
—
tok/s
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Tokens
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Cost
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Phi-3 Mini Instruct 3.8B
Microsoft
TTFT
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Time
—
tok/s
—
Tokens
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Cost
—
Which answer was more useful?
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Full Comparison
| Metric | Top Pick Op o3-pro | Mi Phi-3 Mini Instruct 3.8B |
|---|---|---|
| Pricing per 1M tokens | ||
| Input Cost | $20.00/1M | $0.00/1M |
| Output Cost | $80.00/1M | $0.00/1M |
| Blended (3:1) | $35.00/1M | — |
| Specifications | ||
| Organization | OpenAI | Microsoft |
| Release Date | Jun 10, 2025 | Apr 23, 2024 |
| Performance & Speed | ||
| Throughput | 24.2 tok/s | — |
| TTFT | 67437ms | — |
| Latency | 67437ms | — |
| Composite Indices | ||
| Value Score | 100.0 | — |
| Reasoning Score | 58.5 | 13.0 |
| Intelligence | 32.5 | 4.6 |
| Math | — | 0.3 |
| Standard Benchmarks | ||
| GPQA | 84.5% | 31.9% |
| MMLU Pro | — | 43.5% |
| HLE | — | 4.4% |
| LiveCodeBench | — | 11.6% |
| MATH 500 | — | 45.7% |
| AIME 2025 | — | 0.3% |
| AIME (Original) | — | 4.0% |
| SciCode | — | 9.0% |
| LCR | — | 2.0% |
| IFBench | — | 23.9% |
| TAU-bench v2 | — | 0.0% |
| TerminalBench Hard | — | 0.0% |
Key Takeaways
Phi-3 Mini Instruct 3.8B offers the best value at $0.00/1M,making it ideal for high-volume applications and cost-conscious projects.
o3-pro has the strongest reasoning profile with a 58.5 reasoning score,combining the available reasoning-heavy benchmarks.
All models support context windows of ∞+ tokens,suitable for processing lengthy documents and maintaining extended conversations.
When to Choose Each Model
o3-pro
- Complex reasoning tasks
- Research & analysis
Phi-3 Mini Instruct 3.8B
- Cost-sensitive applications
- High-volume processing
