Gemini 3.6 FlashvsGPT-5.1-Codex-Mini
Gemini 3.6 Flash has a larger context window than GPT-5.1-Codex-Mini (1.0M tokens vs 400K tokens).
| Spec | Gemini 3.6 Flash | GPT-5.1-Codex-Mini |
|---|---|---|
| Input price | $1.5/M tokens | $1.5/M tokens |
| Output price | $7.5/M tokens | $6/M tokens |
| Context window | 1.0M tokens | 400K tokens |
| Weights | Closed | Closed |
| Free API (OpenRouter) | No | No |
| Released | Jul 2026 | Nov 2025 |
Our Verdict
Gemini 3.6 Flash
GPT-5.1-Codex-Mini
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-5.1-Codex-Mini
Input
$1.50
Output
$6.00
1.3× cheaper
Where to run it
3 hosts, cheapest first
Gemini 3.6 Flash2 hosts
GPT-5.1-Codex-Mini1 host
Per million tokens. Prices and uptime via OpenRouter, checked 13 Sep 2026.
Writing DNA
Style Comparison
Similarity
56%
Gemini 3.6 Flash uses 4.2x more emoji
Gemini 3.6 Flash
GPT-5.1-Codex-Mini
60%Vocabulary68%
19wSentence Length19w
0.13Hedging0.64
5.4Bold2.7
2.7Lists2.6
0.04Emoji0.00
0.99Headings0.10
0.07Transitions0.06
Based on 27 + 17 text responses
Research
What we learned reading every model
FAQ
Common questions
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