Claude Sonnet 5 vs Qwen: Qwen3.5 Plus 2026-04-20
Compare Claude Sonnet 5 by Anthropic against Qwen: Qwen3.5 Plus 2026-04-20 by Qwen, context windows of 1.0M vs 1.0M, tested across 52 shared challenges.
Our Verdict
Claude Sonnet 5
Qwen: Qwen3.5 Plus 2026-04-20
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 Plus 2026-04-20 is 4.2x cheaper per token — worth considering if cost matters.
Too close to call
API pricing
Cost per 1M tokens
Claude Sonnet 5
Input
$2.00
Output
$10.00
Qwen: Qwen3.5 Plus 2026-04-20
Input
$0.40
5.0× cheaper
Output
$2.40
4.2× cheaper
Qwen: Qwen3.5 Plus 2026-04-20 is cheaper on both — 5.0× input, 4.2× output
Writing DNA
Style Comparison
Similarity
76%
Claude Sonnet 5 uses 2.3x more sentence length
Claude Sonnet 5
Qwen: Qwen3.5 Plus 2026-04-20
59%Vocabulary59%
35wSentence Length15w
0.53Hedging0.28
3.5Bold4.4
3.5Lists2.5
0.79Emoji1.53
1.25Headings0.76
0.06Transitions0.04
Based on 27 + 27 text responses
Research
What we learned reading every model
FAQ
