GPT-4.1 MinivsGPT-5 Codex
GPT-5 Codex is the newer model, released after GPT-4.1 Mini.
| Spec | GPT-4.1 Mini | GPT-5 Codex |
|---|---|---|
| Input price | $0.4/M tokens | — |
| Output price | $1.6/M tokens | — |
| Context window | 1.0M tokens | — |
| Weights | Closed | — |
| Free API (OpenRouter) | No | No |
| Released | Apr 2025 | Sep 2025 |
Our Verdict
GPT-5 Codex
GPT-4.1 MiniRunner-up
Not enough votes to call it. On the specs, GPT-5 Codex has the edge: bigger model tier, newer.
Too close to call
API pricing
Cost per 1M tokens
GPT-4.1 Mini
Input
$0.40
Output
$1.60
GPT-5 Codex
Input
—
Output
—
Where to run it
2 hosts
GPT-4.1 Mini2 hosts
GPT-5 Codex
No hosts listed on OpenRouter.
Per million tokens. Prices and uptime via OpenRouter, checked 8 Sep 2026.
Writing DNA
Style Comparison
Similarity
60%
GPT-4.1 Mini uses 4.5x more emoji
GPT-4.1 Mini
GPT-5 Codex
62%Vocabulary64%
18wSentence Length17w
0.40Hedging0.38
4.1Bold2.3
4.3Lists3.5
0.66Emoji0.15
0.68Headings0.49
0.14Transitions0.05
Based on 27 + 13 text responses
Research
What we learned reading every model
FAQ
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