Claude 3 Opus vs DeepSeek V3 (March 2024)

Compare Claude 3 Opus by Anthropic against DeepSeek V3 (March 2024) by DeepSeek, context windows of 200K vs 128K, tested across 12 shared challenges. Updated April 2026.

Which is better, Claude 3 Opus or DeepSeek V3 (March 2024)?

Claude 3 Opus and DeepSeek V3 (March 2024) are both competitive models. Claude 3 Opus costs $15/M input tokens vs $0.14/M for DeepSeek V3 (March 2024). Context windows: 200K vs 128K tokens. Compare their real outputs side by side below.

Key Differences Between Claude 3 Opus and DeepSeek V3 (March 2024)

Claude 3 Opus is made by anthropic while DeepSeek V3 (March 2024) is from deepseek. Claude 3 Opus has a 200K token context window compared to DeepSeek V3 (March 2024)'s 128K. On pricing, Claude 3 Opus costs $15/M input tokens vs $0.14/M for DeepSeek V3 (March 2024).

Our Verdict
Claude 3 Opus
Claude 3 Opus
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.

DeepSeek V3 (March 2024) is 268x cheaper per token — worth considering if cost matters.

Too close to call
Writing DNA

Style Comparison

Similarity
87%

DeepSeek V3 (March 2024) uses 748.9x more bold

Claude 3 Opus
DeepSeek V3 (March 2024)
54%Vocabulary58%
14wSentence Length18w
0.48Hedging0.73
0.0Bold7.5
3.0Lists7.6
0.00Emoji0.26
0.00Headings1.60
0.06Transitions0.08
Based on 3 + 16 text responses
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Claude 3 OpusDeepSeek 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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