GPT-5 CodexvsOwl Alpha
Owl Alpha is the newer model, released after GPT-5 Codex.
| Spec | GPT-5 Codex | Owl Alpha |
|---|---|---|
| Input price | — | Free |
| Output price | — | Free |
| Context window | — | 1.0M tokens |
| Free API (OpenRouter) | No | No |
| Released | Sep 2025 | Apr 2026 |
Our Verdict
GPT-5 Codex
Owl AlphaRunner-up
Not enough votes to call it. On the specs, GPT-5 Codex has the edge: bigger model tier, major provider backing.
Too close to call
Reviewing agent-written code?See a Brief PR report
API pricing
Cost per 1M tokens
GPT-5 Codex
Input
—
Output
—
Owl Alpha
Input
$0.000
Output
$0.000
Writing DNA
Style Comparison
Similarity
56%
Owl Alpha uses 4.0x more emoji
GPT-5 Codex
Owl Alpha
64%Vocabulary59%
17wSentence Length21w
0.38Hedging0.56
2.3Bold4.5
3.5Lists3.1
0.15Emoji0.58
0.49Headings0.88
0.05Transitions0.10
Based on 13 + 26 text responses
Research
What we learned reading every model
FAQ
Common questions
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