DeepSeek R1 vs Gemini 2.5 Flash Preview (thinking)
Compare DeepSeek R1 by DeepSeek against Gemini 2.5 Flash Preview (thinking) by Google AI, context windows of 128K vs 1.0M, tested across 20 shared challenges.
Our Verdict
DeepSeek R1
Gemini 2.5 Flash Preview (thinking)
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
DeepSeek R1
Input
$0.55
Output
$2.19
1.6× cheaper
Gemini 2.5 Flash Preview (thinking)
Input
$0.17
3.1× cheaper
Output
$3.50
Gemini 2.5 Flash Preview (thinking) wins input (3.1× cheaper)·DeepSeek R1 wins output (1.6× cheaper)
Writing DNA
Style Comparison
Similarity
53%
DeepSeek R1 uses 4.3x more emoji
DeepSeek R1
Gemini 2.5 Flash Preview (thinking)
62%Vocabulary53%
15wSentence Length14w
0.52Hedging0.38
8.0Bold4.4
5.7Lists4.1
0.04Emoji0.00
0.62Headings0.00
0.28Transitions0.24
Based on 22 + 7 text responses
Research
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FAQ
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