GPT-5.1 vs GPT-5.1-Codex-Mini
Compare GPT-5.1 and GPT-5.1-Codex-Mini, both from OpenAI, in 4 community votes, gpt-5.1 wins 100% of head-to-head duels, context windows of 400K vs 400K, tested across 52 shared challenges.
Reasoning: GPT-5.1 wins 100% of votes
Our Verdict
GPT-5.1Winner
GPT-5.1-Codex-MiniRunner-up
Pick GPT-5.1. In 4 blind votes, GPT-5.1 wins 100% of the time. That's not luck.
GPT-5.1 particularly excels in Reasoning.
Clear winner
API pricing
Cost per 1M tokens
GPT-5.1
Input
$1.25
1.2× cheaper
Output
$10.00
GPT-5.1-Codex-Mini
Input
$1.50
Output
$6.00
1.7× cheaper
GPT-5.1 wins input (1.2× cheaper)·GPT-5.1-Codex-Mini wins output (1.7× cheaper)
Writing DNA
Style Comparison
Similarity
56%
GPT-5.1 uses 7.9x more headings
GPT-5.1
GPT-5.1-Codex-Mini
62%Vocabulary65%
19wSentence Length20w
0.29Hedging0.56
3.5Bold3.3
7.2Lists3.4
0.00Emoji0.00
0.61Headings0.08
0.03Transitions0.05
Based on 14 + 13 text responses
Research
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FAQ
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