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Claude Opus 4.5 vs DeepSeek V3 (March 2024)

Compare Claude Opus 4.5 by Anthropic against DeepSeek V3 (March 2024) by DeepSeek, tested across 53 shared challenges. Updated April 2026.

Which is better, Claude Opus 4.5 or DeepSeek V3 (March 2024)?

Claude Opus 4.5 and DeepSeek V3 (March 2024) are both competitive models. Compare their real outputs side by side below.

Key Differences Between Claude Opus 4.5 and DeepSeek V3 (March 2024)

Claude Opus 4.5 is made by anthropic while DeepSeek V3 (March 2024) is from deepseek.

Our Verdict
Claude Opus 4.5
Claude Opus 4.5
DeepSeek V3 (March 2024)
DeepSeek V3 (March 2024)

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
100%

Claude Opus 4.5 uses 3.0x more sentence length

Claude Opus 4.5
DeepSeek V3 (March 2024)
64%Vocabulary58%
55wSentence Length18w
0.86Hedging0.73
5.8Bold7.5
4.5Lists7.6
0.15Emoji0.26
1.59Headings1.60
0.05Transitions0.08
Based on 24 + 16 text responses
vs

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Claude Opus 4.5DeepSeek V3 (March 2024)

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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