Gemini 2.5 Pro Preview 06-05 vs GPT-5.3-Codex
Compare Gemini 2.5 Pro Preview 06-05 by Google AI against GPT-5.3-Codex by OpenAI, context windows of 1.0M vs 400K, tested across 44 shared challenges.
Our Verdict
Gemini 2.5 Pro Preview 06-05
GPT-5.3-Codex
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
API pricing
Cost per 1M tokens
Gemini 2.5 Pro Preview 06-05
Input
$1.25
1.4× cheaper
Output
$10.00
1.4× cheaper
GPT-5.3-Codex
Input
$1.75
Output
$14.00
Gemini 2.5 Pro Preview 06-05 is cheaper on both — 1.4× input, 1.4× output
Writing DNA
Style Comparison
Similarity
46%
GPT-5.3-Codex uses 15.8x more emoji
Gemini 2.5 Pro Preview 06-05
GPT-5.3-Codex
51%Vocabulary65%
15wSentence Length23w
0.31Hedging0.51
4.8Bold6.5
4.1Lists6.2
0.00Emoji0.16
0.98Headings1.90
0.05Transitions0.03
Based on 20 + 23 text responses
Research
What we learned reading every model
FAQ
