Key Takeaways
GPT-5.2 Pro wins:
- Larger context window
- Higher intelligence benchmark
- Better at coding
- Better at math
- Supports vision
Grok Code Fast 1 wins:
- Cheaper input tokens
- Cheaper output tokens
- Faster response time
Price Advantage
Grok Code Fast 1
Benchmark Advantage
GPT-5.2 Pro
Context Window
GPT-5.2 Pro
Speed
Grok Code Fast 1
Pricing Comparison
Price Comparison
| Metric | GPT-5.2 Pro | Grok Code Fast 1 | Winner |
|---|---|---|---|
| Input (per 1M tokens) | $10.50 | $0.20 | Grok Code Fast 1 |
| Output (per 1M tokens) | $84.00 | $1.50 | Grok Code Fast 1 |
| Cache Read (per 1M) | N/A | $0.02 | Grok Code Fast 1 |
Using a 3:1 input/output ratio, Grok Code Fast 1 is 98% cheaper overall.
GPT-5.2 Pro Providers
No provider data available
Grok Code Fast 1 Providers
No provider data available
Benchmark Comparison
6
Benchmarks Compared
6
GPT-5.2 Pro Wins
0
Grok Code Fast 1 Wins
Benchmark Scores
| Benchmark | GPT-5.2 Pro | Grok Code Fast 1 | Winner |
|---|---|---|---|
Intelligence Index Overall intelligence score | 51.3 | 28.7 | |
Coding Index Code generation & understanding | 48.7 | 23.7 | |
Math Index Mathematical reasoning | 99.0 | 43.3 | |
MMLU Pro Academic knowledge | 87.4 | 79.3 | |
GPQA Graduate-level science | 90.3 | 72.7 | |
LiveCodeBench Competitive programming | 88.9 | 65.7 |
GPT-5.2 Pro significantly outperforms in coding benchmarks.
Cost vs Quality
X-axis:
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GPT-5.2 Pro
Other models
Context & Performance
Context Window
GPT-5.2 Pro
400,000
tokens
Grok Code Fast 1
256,000
tokens
GPT-5.2 Pro has a 36% larger context window.
Speed Performance
| Metric | GPT-5.2 Pro | Grok Code Fast 1 | Winner |
|---|---|---|---|
| Tokens/second | 60.4 tok/s | 154.6 tok/s | |
| Time to First Token | 68.55s | 3.55s |
Grok Code Fast 1 responds 156% faster on average.
Capabilities
Feature Comparison
| Feature | GPT-5.2 Pro | 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 | GPT-5.2 Pro | Grok Code Fast 1 |
|---|---|---|
| License | Proprietary | Proprietary |
| Author | OpenAI | Xai |
| Released | Dec 2025 | Aug 2025 |
GPT-5.2 Pro Modalities
Input
imagetextfile
Output
text
Grok Code Fast 1 Modalities
Input
text
Output
text