Gemini 2.5 Flash Preview 05-20 (thinking) vs GPT-5.4 Mini
Compare Gemini 2.5 Flash Preview 05-20 (thinking) by Google AI against GPT-5.4 Mini by OpenAI, context windows of 1.0M vs 400K, tested across 11 shared challenges.
Our Verdict
Gemini 2.5 Flash Preview 05-20 (thinking)
GPT-5.4 Mini
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 Flash Preview 05-20 (thinking)
Input
$0.15
5.0× cheaper
Output
$3.50
1.3× cheaper
GPT-5.4 Mini
Input
$0.75
Output
$4.50
Gemini 2.5 Flash Preview 05-20 (thinking) is cheaper on both — 5.0× input, 1.3× output
Writing DNA
Style Comparison
Similarity
36%
GPT-5.4 Mini uses 72.0x more hedging
Gemini 2.5 Flash Preview 05-20 (thinking)
GPT-5.4 Mini
70%Vocabulary54%
11wSentence Length20w
0.00Hedging0.72
4.2Bold6.0
7.3Lists8.3
0.00Emoji0.00
0.00Headings2.11
0.00Transitions0.04
Based on 3 + 23 text responses
Research
What we learned reading every model
FAQ
