Claude Opus 4.1
Nothing here. The model returned empty. We stared at it for a while.
Claude Opus 4.1 vs DeepSeek R1
Compare Claude Opus 4.1 by Anthropic against DeepSeek R1 by DeepSeek, context windows of 200K vs 128K, tested across 26 shared challenges. Updated April 2026.
Which is better, Claude Opus 4.1 or DeepSeek R1?
Claude Opus 4.1 and DeepSeek R1 are both competitive models. Claude Opus 4.1 costs $15/M input tokens vs $0.55/M for DeepSeek R1. Context windows: 200K vs 128K tokens. Compare their real outputs side by side below.
Key Differences Between Claude Opus 4.1 and DeepSeek R1
Claude Opus 4.1 is made by anthropic while DeepSeek R1 is from deepseek. Claude Opus 4.1 has a 200K token context window compared to DeepSeek R1's 128K. On pricing, Claude Opus 4.1 costs $15/M input tokens vs $0.55/M for DeepSeek R1.
Our Verdict
Claude Opus 4.1
DeepSeek R1Runner-up
No community votes yet. On paper, Claude Opus 4.1 has the edge — bigger model tier, newer, bigger context window.
DeepSeek R1 is 34x cheaper per token — worth considering if cost matters.
Slight edge
Writing DNA
Style Comparison
Similarity
84%
Claude Opus 4.1 uses 8.9x more emoji
Claude Opus 4.1
DeepSeek R1
61%Vocabulary62%
87wSentence Length15w
0.54Hedging0.52
5.1Bold8.0
6.7Lists5.7
0.38Emoji0.04
1.68Headings0.62
0.13Transitions0.28
Based on 17 + 22 text responses
vsAsk them anything yourself
279 AI models invented the same fake scientist.
We read every word. 250 models. 2.14 million words. This is what we found.
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