Key Takeaways
Command A wins:
- No clear advantages in compared metrics
GPT-5 Codex wins:
- Cheaper input tokens
- Larger context window
- Faster response time
- Higher intelligence benchmark
- Better at coding
- Better at math
- Supports vision
Price Advantage
GPT-5 Codex
Benchmark Advantage
GPT-5 Codex
Context Window
GPT-5 Codex
Speed
GPT-5 Codex
Pricing Comparison
Price Comparison
| Metric | Command A | GPT-5 Codex | Winner |
|---|---|---|---|
| Input (per 1M tokens) | $2.50 | $1.25 | GPT-5 Codex |
| Output (per 1M tokens) | $10.00 | $10.00 | Tie |
| Cache Read (per 1M) | N/A | $125000.00 | GPT-5 Codex |
Using a 3:1 input/output ratio, GPT-5 Codex is 21% cheaper overall.
Command A Providers
Vercel $2.50 (Cheapest)
Cohere $2.50 (Cheapest)
GPT-5 Codex Providers
OpenAI $1.25 (Cheapest)
Benchmark Comparison
8
Benchmarks Compared
0
Command A Wins
6
GPT-5 Codex Wins
Benchmark Scores
| Benchmark | Command A | GPT-5 Codex | Winner |
|---|---|---|---|
Intelligence Index Overall intelligence score | 13.4 | 44.5 | |
Coding Index Code generation & understanding | 9.9 | 38.9 | |
Math Index Mathematical reasoning | 13.0 | 98.7 | |
MMLU Pro Academic knowledge | 71.2 | 86.5 | |
GPQA Graduate-level science | 52.7 | 83.7 | |
LiveCodeBench Competitive programming | 28.7 | 84.0 | |
Aider Real-world code editing | 12.0 | - | - |
AIME Competition math | 9.7 | - | - |
GPT-5 Codex significantly outperforms in coding benchmarks.
Cost vs Quality
X-axis:
Y-axis:
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Command A
Other models
Context & Performance
Context Window
Command A
256,000
tokens
Max output: 8,192 tokens
GPT-5 Codex
400,000
tokens
Max output: 128,000 tokens
GPT-5 Codex has a 36% larger context window.
Speed Performance
| Metric | Command A | GPT-5 Codex | Winner |
|---|---|---|---|
| Tokens/second | 56.8 tok/s | 367.4 tok/s | |
| Time to First Token | 0.28s | 10.94s |
GPT-5 Codex responds 546% faster on average.
Capabilities
Feature Comparison
| Feature | Command A | GPT-5 Codex |
|---|---|---|
| Vision (Image Input) | ||
| Tool/Function Calls | ||
| Reasoning Mode | ||
| Audio Input | ||
| Audio Output | ||
| PDF Input | ||
| Prompt Caching | ||
| Web Search |
License & Release
| Property | Command A | GPT-5 Codex |
|---|---|---|
| License | Open Source | Proprietary |
| Author | Cohere | OpenAI |
| Released | Mar 2025 | Sep 2025 |
Command A Modalities
Input
text
Output
text
GPT-5 Codex Modalities
Input
textimage
Output
text