Key Takeaways
Phi-3 Medium 128K Instruct wins:
- Cheaper output tokens
- Higher intelligence benchmark
Grok Code Fast 1 wins:
- Cheaper input tokens
- Larger context window
- Faster response time
- Better at coding
- Better at math
- Has reasoning mode
Price Advantage
Phi-3 Medium 128K Instruct
Benchmark Advantage
Grok Code Fast 1
Context Window
Grok Code Fast 1
Speed
Grok Code Fast 1
Pricing Comparison
Price Comparison
| Metric | Phi-3 Medium 128K Instruct | Grok Code Fast 1 | Winner |
|---|---|---|---|
| Input (per 1M tokens) | $1.00 | $0.20 | Grok Code Fast 1 |
| Output (per 1M tokens) | $1.00 | $1.50 | Phi-3 Medium 128K Instruct |
| Cache Read (per 1M) | N/A | $0.02 | Grok Code Fast 1 |
Using a 3:1 input/output ratio, Grok Code Fast 1 is 48% cheaper overall.
Phi-3 Medium 128K Instruct Providers
No provider data available
Grok Code Fast 1 Providers
No provider data available
Benchmark Comparison
7
Benchmarks Compared
1
Phi-3 Medium 128K Instruct Wins
2
Grok Code Fast 1 Wins
Benchmark Scores
| Benchmark | Phi-3 Medium 128K Instruct | Grok Code Fast 1 | Winner |
|---|---|---|---|
Intelligence Index Overall intelligence score | 32.0 | 28.7 | |
Coding Index Code generation & understanding | - | 23.7 | - |
Math Index Mathematical reasoning | - | 43.3 | - |
MMLU Pro Academic knowledge | 41.2 | 79.3 | |
GPQA Graduate-level science | 11.5 | 72.7 | |
LiveCodeBench Competitive programming | - | 65.7 | - |
BBH Big-Bench Hard | 48.5 | - | - |
Grok Code Fast 1 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
Grok Code Fast 1
256,000
tokens
Grok Code Fast 1 has a 50% larger context window.
Speed Performance
| Metric | Phi-3 Medium 128K Instruct | Grok Code Fast 1 | Winner |
|---|---|---|---|
| Tokens/second | N/A | 171.7 tok/s | |
| Time to First Token | N/A | 3.27s |
Capabilities
Feature Comparison
| Feature | Phi-3 Medium 128K Instruct | Grok Code Fast 1 |
|---|---|---|
| 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 | Grok Code Fast 1 |
|---|---|---|
| License | Open Source | Proprietary |
| Author | Microsoft | Xai |
| Released | Unknown | Aug 2025 |
Phi-3 Medium 128K Instruct Modalities
Input
Output
Grok Code Fast 1 Modalities
Input
text
Output
text