GPT-5.1-Codex-Mini vs GPT-5.4
Compare GPT-5.1-Codex-Mini and GPT-5.4, both from OpenAI, context windows of 400K vs 1.1M, tested across 53 shared challenges.
Our Verdict
GPT-5.4
GPT-5.1-Codex-MiniRunner-up
No community votes yet. On paper, GPT-5.4 has the edge — newer, bigger context window.
Too close to call
API pricing
Cost per 1M tokens
GPT-5.1-Codex-Mini
Input
$1.50
1.7× cheaper
Output
$6.00
2.5× cheaper
GPT-5.4
Input
$2.50
Output
$15.00
GPT-5.1-Codex-Mini is cheaper on both — 1.7× input, 2.5× output
Writing DNA
Style Comparison
Similarity
48%
GPT-5.4 uses 23.9x more headings
GPT-5.1-Codex-Mini
GPT-5.4
65%Vocabulary54%
20wSentence Length28w
0.56Hedging0.69
3.3Bold4.1
3.4Lists8.1
0.00Emoji0.00
0.08Headings1.84
0.05Transitions0.02
Based on 13 + 22 text responses
Research
What we learned reading every model
FAQ
