Claude Opus 4.1 vs DeepSeek V3 (March 2024)

Compare Claude Opus 4.1 by Anthropic against DeepSeek V3 (March 2024) by DeepSeek, context windows of 200K vs 128K, tested across 27 shared challenges. Updated April 2026.

Which is better, Claude Opus 4.1 or DeepSeek V3 (March 2024)?

Claude Opus 4.1 and DeepSeek V3 (March 2024) are both competitive models. Claude Opus 4.1 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 Opus 4.1 and DeepSeek V3 (March 2024)

Claude Opus 4.1 is made by anthropic while DeepSeek V3 (March 2024) is from deepseek. Claude Opus 4.1 has a 200K token context window compared to DeepSeek V3 (March 2024)'s 128K. On pricing, Claude Opus 4.1 costs $15/M input tokens vs $0.14/M for DeepSeek V3 (March 2024).

Our Verdict
Claude Opus 4.1
Claude Opus 4.1
DeepSeek V3 (March 2024)
DeepSeek V3 (March 2024)Runner-up

No community votes yet. On paper, Claude Opus 4.1 has the edge — newer, bigger context window.

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

Too close to call
Writing DNA

Style Comparison

Similarity
100%

Claude Opus 4.1 uses 4.8x more sentence length

Claude Opus 4.1
DeepSeek V3 (March 2024)
61%Vocabulary58%
87wSentence Length18w
0.54Hedging0.73
5.1Bold7.5
6.7Lists7.6
0.38Emoji0.26
1.68Headings1.60
0.13Transitions0.08
Based on 17 + 16 text responses
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Claude Opus 4.1DeepSeek V3 (March 2024)

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