DeepSeek R1 vs Qwen: Qwen3.5 Plus 2026-02-15

Compare DeepSeek R1 by DeepSeek against Qwen: Qwen3.5 Plus 2026-02-15 by Qwen, context windows of 128K vs 1.0M, tested across 52 shared challenges. Updated April 2026.

Which is better, DeepSeek R1 or Qwen: Qwen3.5 Plus 2026-02-15?

DeepSeek R1 and Qwen: Qwen3.5 Plus 2026-02-15 are both competitive models. DeepSeek R1 costs $0.55/M input tokens vs $0.4/M for Qwen: Qwen3.5 Plus 2026-02-15. Context windows: 128K vs 1000K tokens. Compare their real outputs side by side below.

Key Differences Between DeepSeek R1 and Qwen: Qwen3.5 Plus 2026-02-15

DeepSeek R1 is made by deepseek while Qwen: Qwen3.5 Plus 2026-02-15 is from qwen. DeepSeek R1 has a 128K token context window compared to Qwen: Qwen3.5 Plus 2026-02-15's 1000K. On pricing, DeepSeek R1 costs $0.55/M input tokens vs $0.4/M for Qwen: Qwen3.5 Plus 2026-02-15.

Our Verdict
Qwen: Qwen3.5 Plus 2026-02-15
Qwen: Qwen3.5 Plus 2026-02-15
DeepSeek R1
DeepSeek R1Runner-up

No community votes yet. On paper, Qwen: Qwen3.5 Plus 2026-02-15 has the edge — bigger model tier, newer, bigger context window.

Too close to call
Writing DNA

Style Comparison

Similarity
95%

DeepSeek R1 uses 3.0x more transitions

DeepSeek R1
Qwen: Qwen3.5 Plus 2026-02-15
62%Vocabulary54%
15wSentence Length18w
0.52Hedging0.51
8.0Bold5.3
5.7Lists2.9
0.04Emoji0.10
0.62Headings0.75
0.28Transitions0.09
Based on 22 + 23 text responses
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DeepSeek R1Qwen: Qwen3.5 Plus 2026-02-15

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