Claude Opus 5 vs DeepSeek R1
Compare Claude Opus 5 by Anthropic against DeepSeek R1 by DeepSeek, context windows of 1.0M vs 128K, tested across 53 shared challenges.
Our Verdict
Claude Opus 5
DeepSeek R1Runner-up
No community votes yet. On paper, Claude Opus 5 has the edge — bigger model tier, newer, bigger context window.
DeepSeek R1 is 11x 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
DeepSeek R1
Input
$0.55
9.1× cheaper
Output
$2.19
11× cheaper
DeepSeek R1 is cheaper on both — 9.1× input, 11× output
Writing DNA
Style Comparison
Similarity
29%
DeepSeek R1 uses 5.5x more transitions
Claude Opus 5
DeepSeek R1
54%Vocabulary62%
21wSentence Length15w
0.40Hedging0.52
3.9Bold8.0
1.9Lists5.7
0.02Emoji0.04
0.71Headings0.62
0.05Transitions0.28
Based on 27 + 22 text responses
Research
What we learned reading every model
FAQ
