Key Takeaways
GPT-5.1-Codex-Mini wins:
- Cheaper input tokens
- Cheaper output tokens
- Faster response time
GPT-5.2 Pro wins:
- Higher intelligence benchmark
- Better at coding
- Better at math
Price Advantage
GPT-5.1-Codex-Mini
Benchmark Advantage
GPT-5.2 Pro
Context Window
GPT-5.2 Pro
Speed
GPT-5.1-Codex-Mini
Pricing Comparison
Price Comparison
| Metric | GPT-5.1-Codex-Mini | GPT-5.2 Pro | Winner |
|---|---|---|---|
| Input (per 1M tokens) | $0.25 | $21.00 | GPT-5.1-Codex-Mini |
| Output (per 1M tokens) | $2.00 | $168.00 | GPT-5.1-Codex-Mini |
| Cache Read (per 1M) | $25000.00 | N/A | GPT-5.1-Codex-Mini |
Using a 3:1 input/output ratio, GPT-5.1-Codex-Mini is 99% cheaper overall.
GPT-5.1-Codex-Mini Providers
OpenAI $0.25 (Cheapest)
Azure $0.25 (Cheapest)
GPT-5.2 Pro Providers
OpenAI $21.00 (Cheapest)
Benchmark Comparison
6
Benchmarks Compared
0
GPT-5.1-Codex-Mini Wins
6
GPT-5.2 Pro Wins
Benchmark Scores
| Benchmark | GPT-5.1-Codex-Mini | GPT-5.2 Pro | Winner |
|---|---|---|---|
Intelligence Index Overall intelligence score | 38.5 | 51.2 | |
Coding Index Code generation & understanding | 36.4 | 48.7 | |
Math Index Mathematical reasoning | 91.7 | 99.0 | |
MMLU Pro Academic knowledge | 82.0 | 87.4 | |
GPQA Graduate-level science | 81.3 | 90.3 | |
LiveCodeBench Competitive programming | 83.6 | 88.9 |
GPT-5.2 Pro significantly outperforms in coding benchmarks.
Cost vs Quality
X-axis:
Y-axis:
Loading chart...
GPT-5.1-Codex-Mini
Other models
Context & Performance
Context Window
GPT-5.1-Codex-Mini
400,000
tokens
Max output: 100,000 tokens
GPT-5.2 Pro
400,000
tokens
Max output: 128,000 tokens
Speed Performance
| Metric | GPT-5.1-Codex-Mini | GPT-5.2 Pro | Winner |
|---|---|---|---|
| Tokens/second | 114.2 tok/s | 98.3 tok/s | |
| Time to First Token | 12.88s | 46.57s |
GPT-5.1-Codex-Mini responds 16% faster on average.
Capabilities
Feature Comparison
| Feature | GPT-5.1-Codex-Mini | 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 | GPT-5.1-Codex-Mini | GPT-5.2 Pro |
|---|---|---|
| License | Proprietary | Proprietary |
| Author | OpenAI | OpenAI |
| Released | Nov 2025 | Dec 2025 |
GPT-5.1-Codex-Mini Modalities
Input
imagetext
Output
text
GPT-5.2 Pro Modalities
Input
imagetextfile
Output
text