Gemini 3 Flash Preview vs xAI: Grok 4.5
Compare Gemini 3 Flash Preview by Google AI against xAI: Grok 4.5 by xAI, context windows of 1.0M vs 500K, tested across 54 shared challenges.
Our Verdict
Gemini 3 Flash Preview
xAI: Grok 4.5
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 3 Flash Preview
Input
$0.50
4.0× cheaper
Output
$3.00
2.0× cheaper
xAI: Grok 4.5
Input
$2.00
Output
$6.00
Gemini 3 Flash Preview is cheaper on both — 4.0× input, 2.0× output
Writing DNA
Style Comparison
Similarity
39%
xAI: Grok 4.5 uses 9.0x more emoji
Gemini 3 Flash Preview
xAI: Grok 4.5
55%Vocabulary61%
18wSentence Length16w
0.42Hedging0.23
7.1Bold2.5
4.5Lists2.4
0.00Emoji0.09
0.84Headings0.48
0.07Transitions0.06
Based on 24 + 27 text responses
Research
What we learned reading every model
FAQ
