Claude 3.7 Thinking Sonnet vs Gemini 2.5 Flash Preview 09-2025
Compare Claude 3.7 Thinking Sonnet by Anthropic against Gemini 2.5 Flash Preview 09-2025 by Google AI, context windows of 200K vs 1.0M, tested across 51 shared challenges.
Our Verdict
Gemini 2.5 Flash Preview 09-2025
Claude 3.7 Thinking SonnetRunner-up
No community votes yet. On paper, Gemini 2.5 Flash Preview 09-2025 has the edge — bigger model tier, newer, bigger context window.
Gemini 2.5 Flash Preview 09-2025 is 12x cheaper per token — worth considering if cost matters.
Slight edge
API pricing
Cost per 1M tokens
Claude 3.7 Thinking Sonnet
Input
$6.00
Output
$30.00
Gemini 2.5 Flash Preview 09-2025
Input
$0.30
20× cheaper
Output
$2.50
12× cheaper
Gemini 2.5 Flash Preview 09-2025 is cheaper on both — 20× input, 12× output
Writing DNA
Style Comparison
Similarity
42%
Gemini 2.5 Flash Preview 09-2025 uses 13.5x more emoji
Claude 3.7 Thinking Sonnet
Gemini 2.5 Flash Preview 09-2025
61%Vocabulary53%
49wSentence Length19w
0.64Hedging0.30
2.2Bold5.8
4.5Lists3.1
0.00Emoji0.14
1.81Headings0.93
0.21Transitions0.22
Based on 21 + 22 text responses
Research
What we learned reading every model
FAQ
