Key Takeaways
Phi-3 Medium 128K Instruct wins:
- Cheaper input tokens
- Cheaper output tokens
GPT-5.2 Pro wins:
- Larger context window
- Faster response time
- Higher intelligence benchmark
- Better at coding
- Better at math
- Supports vision
- Has reasoning mode
Price Advantage
Phi-3 Medium 128K Instruct
Benchmark Advantage
GPT-5.2 Pro
Context Window
GPT-5.2 Pro
Speed
GPT-5.2 Pro
Pricing Comparison
Price Comparison
| Metric | Phi-3 Medium 128K Instruct | GPT-5.2 Pro | Winner |
|---|---|---|---|
| Input (per 1M tokens) | $1.00 | $10.50 | Phi-3 Medium 128K Instruct |
| Output (per 1M tokens) | $1.00 | $84.00 | Phi-3 Medium 128K Instruct |
Using a 3:1 input/output ratio, Phi-3 Medium 128K Instruct is 97% cheaper overall.
Phi-3 Medium 128K Instruct Providers
No provider data available
GPT-5.2 Pro Providers
No provider data available
Benchmark Comparison
7
Benchmarks Compared
0
Phi-3 Medium 128K Instruct Wins
3
GPT-5.2 Pro Wins
Benchmark Scores
| Benchmark | Phi-3 Medium 128K Instruct | GPT-5.2 Pro | Winner |
|---|---|---|---|
Intelligence Index Overall intelligence score | 32.0 | 51.3 | |
Coding Index Code generation & understanding | - | 48.7 | - |
Math Index Mathematical reasoning | - | 99.0 | - |
MMLU Pro Academic knowledge | 41.2 | 87.4 | |
GPQA Graduate-level science | 11.5 | 90.3 | |
LiveCodeBench Competitive programming | - | 88.9 | - |
BBH Big-Bench Hard | 48.5 | - | - |
GPT-5.2 Pro significantly outperforms in coding benchmarks.
Cost vs Quality
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Phi-3 Medium 128K Instruct
Other models
Context & Performance
Context Window
Phi-3 Medium 128K Instruct
128,000
tokens
GPT-5.2 Pro
400,000
tokens
GPT-5.2 Pro has a 68% larger context window.
Speed Performance
| Metric | Phi-3 Medium 128K Instruct | GPT-5.2 Pro | Winner |
|---|---|---|---|
| Tokens/second | N/A | 65.7 tok/s | |
| Time to First Token | N/A | 74.76s |
Capabilities
Feature Comparison
| Feature | Phi-3 Medium 128K Instruct | GPT-5.2 Pro |
|---|---|---|
| Vision (Image Input) | ||
| Tool/Function Calls | ||
| Reasoning Mode | ||
| Audio Input | ||
| Audio Output | ||
| PDF Input | ||
| Prompt Caching | ||
| Web Search |
License & Release
| Property | Phi-3 Medium 128K Instruct | GPT-5.2 Pro |
|---|---|---|
| License | Open Source | Proprietary |
| Author | Microsoft | OpenAI |
| Released | Unknown | Dec 2025 |
Phi-3 Medium 128K Instruct Modalities
Input
Output
GPT-5.2 Pro Modalities
Input
imagetextfile
Output
text