Gemini 2.5 Flash Preview 05-20 (thinking)vsGPT-5.1-Codex-Mini
Gemini 2.5 Flash Preview 05-20 (thinking) is cheaper than GPT-5.1-Codex-Mini at $0.15/M vs $1.5/M input tokens.
| Spec | Gemini 2.5 Flash Preview 05-20 (thinking) | GPT-5.1-Codex-Mini |
|---|---|---|
| Input price | $0.15/M tokens | $1.5/M tokens |
| Output price | $3.5/M tokens | $6/M tokens |
| Context window | 1.0M tokens | 400K tokens |
| Released | May 2025 | Nov 2025 |
Our Verdict
GPT-5.1-Codex-Mini
Gemini 2.5 Flash Preview 05-20 (thinking)Runner-up
Not enough votes to call it. On the specs, GPT-5.1-Codex-Mini has the edge: bigger model tier, newer.
Too close to call
API pricing
Cost per 1M tokens
Gemini 2.5 Flash Preview 05-20 (thinking)
Input
$0.15
10× cheaper
Output
$3.50
1.7× cheaper
GPT-5.1-Codex-Mini
Input
$1.50
Output
$6.00
Gemini 2.5 Flash Preview 05-20 (thinking) is cheaper on both — 10× input, 1.7× output
Writing DNA
Style Comparison
Similarity
61%
GPT-5.1-Codex-Mini uses 56.4x more hedging
Gemini 2.5 Flash Preview 05-20 (thinking)
GPT-5.1-Codex-Mini
70%Vocabulary65%
11wSentence Length20w
0.00Hedging0.56
4.2Bold3.3
7.3Lists3.4
0.00Emoji0.00
0.00Headings0.08
0.00Transitions0.05
Based on 3 + 13 text responses
Research
What we learned reading every model
FAQ
Common questions
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