Claude Opus 5 vs Gemini 2.0 Flash Thinking
Compare Claude Opus 5 by Anthropic against Gemini 2.0 Flash Thinking by Google AI, context windows of 1.0M vs 500K, tested across 20 shared challenges.
Our Verdict
Claude Opus 5
Gemini 2.0 Flash ThinkingRunner-up
No community votes yet. On paper, Claude Opus 5 has the edge — bigger model tier, newer, bigger context window.
Gemini 2.0 Flash Thinking is 50x cheaper per token — worth considering if cost matters.
Slight edge
API pricing
Cost per 1M tokens
Claude Opus 5
Input
$5.00
Output
$25.00
Gemini 2.0 Flash Thinking
Input
$0.25
20× cheaper
Output
$0.50
50× cheaper
Gemini 2.0 Flash Thinking is cheaper on both — 20× input, 50× output
Writing DNA
Style Comparison
Similarity
48%
Claude Opus 5 uses 1.7x more emoji
Claude Opus 5
Gemini 2.0 Flash Thinking
54%Vocabulary54%
21wSentence Length15w
0.40Hedging0.64
3.9Bold3.8
1.9Lists2.4
0.02Emoji0.00
0.71Headings0.03
0.05Transitions0.30
Based on 27 + 13 text responses
Research
What we learned reading every model
FAQ
