Gemini 2.5 Flash Preview (thinking) vs Grok 4.5
Compare Gemini 2.5 Flash Preview (thinking) by Google AI against Grok 4.5 by xAI, context windows of 1.0M vs 500K, tested across 20 shared challenges.
Our Verdict
Grok 4.5
Gemini 2.5 Flash Preview (thinking)Runner-up
No community votes yet. On paper, Grok 4.5 has the edge — bigger model tier, newer.
Too close to call
API pricing
Cost per 1M tokens
Gemini 2.5 Flash Preview (thinking)
Input
$0.17
11× cheaper
Output
$3.50
1.7× cheaper
Grok 4.5
Input
$2.00
Output
$6.00
Gemini 2.5 Flash Preview (thinking) is cheaper on both — 11× input, 1.7× output
Writing DNA
Style Comparison
Similarity
50%
Grok 4.5 uses 9.0x more emoji
Gemini 2.5 Flash Preview (thinking)
Grok 4.5
53%Vocabulary61%
14wSentence Length16w
0.38Hedging0.23
4.4Bold2.5
4.1Lists2.4
0.00Emoji0.09
0.00Headings0.48
0.24Transitions0.06
Based on 7 + 27 text responses
Research
What we learned reading every model
FAQ
