Microsoft Phi-4 vs O3 Mini
Performance benchmarks + pricing comparison — updated April 2026
Microsoft Phi-4
MicrosoftMicrosoft's compact 14B model with strong reasoning and coding capability. Excellent value for small-scale deployments.
| Input | $0.100/M |
| Output | $0.300/M |
| Context | 128K tokens |
| Best For | Edge deployments, local inference, budget coding |
| Benchmark | 45/100 |
O3 Mini
OpenAIOpenAI's reasoning model at lower cost. Strong at math, coding, and science tasks.
| Input | $1.10/M |
| Output | $4.40/M |
| Context | 200K tokens |
| Best For | Math, science, coding tasks requiring deep reasoning |
| Benchmark | 80/100 |
Benchmark Performance Comparison
Third-party benchmark scores — higher is better. Data sourced from SWE-bench, LiveCodeBench, HumanEval, and BigCodeBench.
| Benchmark | Microsoft Phi-4 | O3 Mini | Leader |
|---|---|---|---|
| Overall Score | 45 | 80 | o3-mini leads by 35pts |
| SWE-bench Verified | 38 | 76 | o3-mini leads by 38pts |
| LiveCodeBench | 46 | 85 | o3-mini leads by 39pts |
| HumanEval | 68 | 94 | o3-mini leads by 26pts |
| BigCodeBench | 30 | 65 | o3-mini leads by 35pts |
Cost Comparison by Scenario
Estimated cost per project with 30% cache hit rate. Actual costs may vary based on usage patterns.
| Scenario | Microsoft Phi-4 | O3 Mini | Savings |
|---|---|---|---|
| Small Script (1K lines) | $0.01 | $0.17 | Microsoft Phi-4 saves $0.16 (93%) |
| Medium Feature (10K lines) | $0.10 | $1.27 | Microsoft Phi-4 saves $1.17 (92%) |
| Large Project (50K lines) | $0.47 | $6.33 | Microsoft Phi-4 saves $5.85 (92%) |
| Code Review (5K lines) | $0.02 | $0.30 | Microsoft Phi-4 saves $0.28 (92%) |
Value Analysis (Price per Benchmark Score Point)
Lower is better — how much you pay for each point of benchmark performance.
| Model | Overall Score | Price per Score Point | Verdict |
|---|---|---|---|
| Microsoft Phi-4 | 45 | $0.002/pt | Better value |
| O3 Mini | 80 | $0.014/pt | Higher cost per point |
Microsoft Phi-4 delivers the best value at $0.002 per score point.
Strengths & Weaknesses
Microsoft Phi-4
- + Small model, runs locally
- - Limited capacity
O3 Mini
- + Excellent at competitive programming
- + Strong algorithmic reasoning
- - Optimized for reasoning, not chat
Verdict
Microsoft Phi-4 is cheaper at $0.100/M, but O3 Mini scores higher on benchmarks (80 vs 45).
Choose Microsoft Phi-4 for cost-sensitive projects, O3 Mini when performance matters most.
Compare with Other Models
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Claude 3.5 Sonnet
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Claude 3.5 Haiku
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Claude 3 Opus
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Claude 3 Sonnet
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