Claude 3 Opus vs DeepSeek R1 0528

Compare Claude 3 Opus by Anthropic against DeepSeek R1 0528 by DeepSeek, context windows of 200K vs 164K, tested across 12 shared challenges. Updated April 2026.

Which is better, Claude 3 Opus or DeepSeek R1 0528?

Claude 3 Opus and DeepSeek R1 0528 are both competitive models. Claude 3 Opus costs $15/M input tokens vs $0/M for DeepSeek R1 0528. Context windows: 200K vs 164K tokens. Compare their real outputs side by side below.

Key Differences Between Claude 3 Opus and DeepSeek R1 0528

Claude 3 Opus is made by anthropic while DeepSeek R1 0528 is from deepseek. Claude 3 Opus has a 200K token context window compared to DeepSeek R1 0528's 164K. On pricing, Claude 3 Opus costs $15/M input tokens vs $0/M for DeepSeek R1 0528.

Our Verdict
Claude 3 Opus
Claude 3 Opus
DeepSeek R1 0528
DeepSeek R1 0528

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
Writing DNA

Style Comparison

Similarity
98%

DeepSeek R1 0528 uses 683.2x more bold

Claude 3 Opus
DeepSeek R1 0528
54%Vocabulary64%
14wSentence Length10w
0.48Hedging0.30
0.0Bold6.8
3.0Lists4.9
0.00Emoji0.00
0.00Headings0.40
0.06Transitions0.00
Based on 3 + 4 text responses
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Claude 3 OpusDeepSeek R1 0528

279 AI models invented the same fake scientist.

We read every word. 250 models. 2.14 million words. This is what we found.

AI Hallucination Index 2026
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