Claude Opus 5 vs Gemini 3.1 Pro Preview
Compare Claude Opus 5 by Anthropic against Gemini 3.1 Pro Preview by Google AI, context windows of 1.0M vs 1.0M, tested across 53 shared challenges.
Our Verdict
Claude Opus 5
Gemini 3.1 Pro Preview
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
Claude Opus 5
Input
$5.00
Output
$25.00
Gemini 3.1 Pro Preview
Input
$2.00
2.5× cheaper
Output
$12.00
2.1× cheaper
Gemini 3.1 Pro Preview is cheaper on both — 2.5× input, 2.1× output
Writing DNA
Style Comparison
Similarity
70%
Claude Opus 5 uses 1.7x more emoji
Claude Opus 5
Gemini 3.1 Pro Preview
54%Vocabulary54%
21wSentence Length18w
0.40Hedging0.29
3.9Bold4.9
1.9Lists3.3
0.02Emoji0.00
0.71Headings0.72
0.05Transitions0.14
Based on 27 + 23 text responses
Research
What we learned reading every model
FAQ
