Claude Sonnet 4 vs Qwen: Qwen3.5 Flash
Compare Claude Sonnet 4 by Anthropic against Qwen: Qwen3.5 Flash by Qwen, context windows of 200K vs 1.0M, tested across 53 shared challenges.
Our Verdict
Claude Sonnet 4
Qwen: Qwen3.5 Flash
No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.
Qwen: Qwen3.5 Flash is 38x cheaper per token — worth considering if cost matters.
Too close to call
API pricing
Cost per 1M tokens
Claude Sonnet 4
Input
$3.00
Output
$15.00
Qwen: Qwen3.5 Flash
Input
$0.10
30× cheaper
Output
$0.40
38× cheaper
Qwen: Qwen3.5 Flash is cheaper on both — 30× input, 38× output
Writing DNA
Style Comparison
Similarity
43%
Claude Sonnet 4 uses 34.5x more emoji
Claude Sonnet 4
Qwen: Qwen3.5 Flash
62%Vocabulary50%
111wSentence Length14w
0.40Hedging0.35
5.0Bold6.9
9.3Lists4.2
0.88Emoji0.03
2.16Headings1.00
0.33Transitions0.15
Based on 17 + 23 text responses
Research
What we learned reading every model
FAQ
