OpenAI Codex MinivsGPT-6 Astra Pro
OpenAI Codex Mini is cheaper than GPT-6 Astra Pro at $1.5/M vs $10/M input tokens.
| Spec | OpenAI Codex Mini | GPT-6 Astra Pro |
|---|---|---|
| Input price | $1.5/M tokens | $10/M tokens |
| Output price | $6/M tokens | $50/M tokens |
| Context window | 200K tokens | 1.1M tokens |
| Weights | — | Closed |
| Free API (OpenRouter) | No | No |
| Released | May 2025 | Sep 2026 |
Our Verdict
GPT-6 Astra Pro
OpenAI Codex MiniRunner-up
Not enough votes to call it. On the specs, GPT-6 Astra Pro has the edge: bigger model tier, newer, bigger context window.
OpenAI Codex Mini costs 8.3x less per token.
Slight edge
Reviewing agent-written code?See a Brief PR report
API pricing
Cost per 1M tokens
OpenAI Codex Mini
Input
$1.50
6.7× cheaper
Output
$6.00
8.3× cheaper
GPT-6 Astra Pro
Input
$10.00
Output
$50.00
OpenAI Codex Mini is cheaper on both: 6.7× input, 8.3× output.
Where to run it
2 hosts
OpenAI Codex Mini
No hosts listed on OpenRouter.
GPT-6 Astra Pro2 hosts
Per million tokens. Prices and uptime via OpenRouter, checked 16 Sep 2026.
Research
What we learned reading every model
FAQ
Common questions
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