Gemini 3.6 FlashvsGPT-5 Codex
Gemini 3.6 Flash is the newer model, released after GPT-5 Codex.
| Spec | Gemini 3.6 Flash | GPT-5 Codex |
|---|---|---|
| Input price | $1.5/M tokens | — |
| Output price | $7.5/M tokens | — |
| Context window | 1.0M tokens | — |
| Weights | Closed | — |
| Free API (OpenRouter) | No | No |
| Released | Jul 2026 | Sep 2025 |
Our Verdict
Gemini 3.6 Flash
GPT-5 Codex
Not enough votes to call it. On the specs, nothing separates them.
Too close to call
Reviewing agent-written code?See a Brief PR report
API pricing
Cost per 1M tokens
Gemini 3.6 Flash
Input
$1.50
Output
$7.50
GPT-5 Codex
Input
—
Output
—
Where to run it
2 hosts, cheapest first
Gemini 3.6 Flash2 hosts
GPT-5 Codex
No hosts listed on OpenRouter.
Per million tokens. Prices and uptime via OpenRouter, checked 12 Sep 2026.
Writing DNA
Style Comparison
Similarity
59%
GPT-5 Codex uses 3.5x more emoji
Gemini 3.6 Flash
GPT-5 Codex
60%Vocabulary64%
19wSentence Length17w
0.13Hedging0.38
5.4Bold2.3
2.7Lists3.5
0.04Emoji0.15
0.99Headings0.49
0.07Transitions0.05
Based on 27 + 13 text responses
Research
What we learned reading every model
FAQ
Common questions
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