Gemini 3.1 Flash Lite PreviewvsGPT-5.1 Codex Max
Gemini 3.1 Flash Lite Preview is the newer model, released after GPT-5.1 Codex Max.
| Spec | Gemini 3.1 Flash Lite Preview | GPT-5.1 Codex Max |
|---|---|---|
| Input price | $0.25/M tokens | — |
| Output price | $1.5/M tokens | — |
| Context window | 1.0M tokens | — |
| Weights | Closed | Closed |
| Free API (OpenRouter) | No | No |
| Released | Mar 2026 | Dec 2025 |
Our Verdict
Gemini 3.1 Flash Lite Preview
GPT-5.1 Codex Max
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 3.1 Flash Lite Preview
Input
$0.25
Output
$1.50
GPT-5.1 Codex Max
Input
—
Output
—
Where to run it
2 hosts
Gemini 3.1 Flash Lite Preview1 host
GPT-5.1 Codex Max1 host
Per million tokens. Prices and uptime via OpenRouter, checked 11 Sep 2026.
Writing DNA
Style Comparison
Similarity
56%
Gemini 3.1 Flash Lite Preview uses 7.7x more headings
Gemini 3.1 Flash Lite Preview
GPT-5.1 Codex Max
56%Vocabulary60%
18wSentence Length16w
0.28Hedging0.36
5.4Bold2.3
3.9Lists4.2
0.00Emoji0.00
0.95Headings0.12
0.07Transitions0.03
Based on 23 + 13 text responses
Research
What we learned reading every model
FAQ
Common questions
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