GPT-5.1-Codex-Mini
Nothing here. The model returned empty. We stared at it for a while.
GPT-5.1-Codex-Mini vs Gemini 2.5 Pro (I/O Edition)
Compare GPT-5.1-Codex-Mini by OpenAI against Gemini 2.5 Pro (I/O Edition) by Google AI, tested across 35 shared challenges. Updated April 2026.
Which is better, GPT-5.1-Codex-Mini or Gemini 2.5 Pro (I/O Edition)?
GPT-5.1-Codex-Mini and Gemini 2.5 Pro (I/O Edition) are both competitive models. GPT-5.1-Codex-Mini costs $1.5/M input tokens vs $1.25/M for Gemini 2.5 Pro (I/O Edition). Compare their real outputs side by side below.
Key Differences Between GPT-5.1-Codex-Mini and Gemini 2.5 Pro (I/O Edition)
GPT-5.1-Codex-Mini is made by openai while Gemini 2.5 Pro (I/O Edition) is from google. On pricing, GPT-5.1-Codex-Mini costs $1.5/M input tokens vs $1.25/M for Gemini 2.5 Pro (I/O Edition).
Our Verdict
GPT-5.1-Codex-Mini
Gemini 2.5 Pro (I/O Edition)
No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.
Too close to call
Writing DNA
Style Comparison
Similarity
100%
Gemini 2.5 Pro (I/O Edition) uses 8.1x more headings
GPT-5.1-Codex-Mini
Gemini 2.5 Pro (I/O Edition)
65%Vocabulary58%
20wSentence Length16w
0.56Hedging0.38
3.3Bold5.8
3.4Lists5.0
0.00Emoji0.00
0.08Headings0.63
0.05Transitions0.01
Based on 13 + 16 text responses
vsAsk them anything yourself
279 AI models invented the same fake scientist.
We read every word. 250 models. 2.14 million words. This is what we found.
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