Key Takeaways
GPT-5 Codex wins:
- Larger context window
- Faster response time
- Higher intelligence benchmark
- Better at coding
- Better at math
- Supports vision
- Supports tool calls
o1 Mini wins:
- Cheaper input tokens
- Cheaper output tokens
Price Advantage
o1 Mini
Benchmark Advantage
GPT-5 Codex
Context Window
GPT-5 Codex
Speed
GPT-5 Codex
Pricing Comparison
Price Comparison
| Metric | GPT-5 Codex | o1 Mini | Winner |
|---|---|---|---|
| Input (per 1M tokens) | $1.25 | $0.55 | o1 Mini |
| Output (per 1M tokens) | $10.00 | $2.20 | o1 Mini |
| Cache Read (per 1M) | $0.13 | $0.55 | GPT-5 Codex |
Using a 3:1 input/output ratio, o1 Mini is 72% cheaper overall.
GPT-5 Codex Providers
No provider data available
o1 Mini Providers
No provider data available
Benchmark Comparison
7
Benchmarks Compared
4
GPT-5 Codex Wins
0
o1 Mini Wins
Benchmark Scores
| Benchmark | GPT-5 Codex | o1 Mini | Winner |
|---|---|---|---|
Intelligence Index Overall intelligence score | 44.6 | 20.4 | |
Coding Index Code generation & understanding | 38.9 | - | - |
Math Index Mathematical reasoning | 98.7 | - | - |
MMLU Pro Academic knowledge | 86.5 | 74.2 | |
GPQA Graduate-level science | 83.7 | 60.3 | |
LiveCodeBench Competitive programming | 84.0 | 57.6 | |
AIME Competition math | - | 60.3 | - |
GPT-5 Codex significantly outperforms in coding benchmarks.
Cost vs Quality
X-axis:
Y-axis:
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GPT-5 Codex
Other models
Context & Performance
Context Window
GPT-5 Codex
400,000
tokens
o1 Mini
N/A
tokens
Speed Performance
| Metric | GPT-5 Codex | o1 Mini | Winner |
|---|---|---|---|
| Tokens/second | 182.4 tok/s | 0.0 tok/s | |
| Time to First Token | 6.83s | 0.00s |
GPT-5 Codex responds Infinity% faster on average.
Capabilities
Feature Comparison
| Feature | GPT-5 Codex | o1 Mini |
|---|---|---|
| Vision (Image Input) | ||
| Tool/Function Calls | ||
| Reasoning Mode | ||
| Audio Input | ||
| Audio Output | ||
| PDF Input | ||
| Prompt Caching | ||
| Web Search |
License & Release
| Property | GPT-5 Codex | o1 Mini |
|---|---|---|
| License | Proprietary | Proprietary |
| Author | OpenAI | OpenAI |
| Released | Sep 2025 | Unknown |
GPT-5 Codex Modalities
Input
textimage
Output
text
o1 Mini Modalities
Input
Output