DeepSeek V4 Flash 0731 vs Qwen: Qwen3.5 Plus 2026-02-15
Compare DeepSeek V4 Flash 0731 by DeepSeek against Qwen: Qwen3.5 Plus 2026-02-15 by Qwen, context windows of 1.0M vs 1.0M, tested across 42 shared challenges.
Our Verdict
DeepSeek V4 Flash 0731
Qwen: Qwen3.5 Plus 2026-02-15
No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.
DeepSeek V4 Flash 0731 is 8.6x cheaper per token — worth considering if cost matters.
Too close to call
API pricing
Cost per 1M tokens
DeepSeek V4 Flash 0731
Input
$0.14
2.9× cheaper
Output
$0.28
8.6× cheaper
Qwen: Qwen3.5 Plus 2026-02-15
Input
$0.40
Output
$2.40
DeepSeek V4 Flash 0731 is cheaper on both — 2.9× input, 8.6× output
Writing DNA
Style Comparison
Similarity
63%
Qwen: Qwen3.5 Plus 2026-02-15 uses 10.0x more emoji
DeepSeek V4 Flash 0731
Qwen: Qwen3.5 Plus 2026-02-15
52%Vocabulary54%
18wSentence Length18w
0.38Hedging0.51
5.7Bold5.3
3.4Lists2.9
0.00Emoji0.10
0.83Headings0.75
0.04Transitions0.09
Based on 23 + 23 text responses
Research
What we learned reading every model
FAQ
