Claude Sonnet 5 vs Qwen: Qwen3.5 Plus 2026-02-15
Compare Claude Sonnet 5 by Anthropic against Qwen: Qwen3.5 Plus 2026-02-15 by Qwen, context windows of 1.0M vs 1.0M, tested across 53 shared challenges.
Our Verdict
Claude Sonnet 5
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.
Qwen: Qwen3.5 Plus 2026-02-15 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 2026-02-15
Input
$0.40
5.0× cheaper
Output
$2.40
4.2× cheaper
Qwen: Qwen3.5 Plus 2026-02-15 is cheaper on both — 5.0× input, 4.2× output
Writing DNA
Style Comparison
Similarity
40%
Claude Sonnet 5 uses 7.9x more emoji
Claude Sonnet 5
Qwen: Qwen3.5 Plus 2026-02-15
59%Vocabulary54%
35wSentence Length18w
0.53Hedging0.51
3.5Bold5.3
3.5Lists2.9
0.79Emoji0.10
1.25Headings0.75
0.06Transitions0.09
Based on 27 + 23 text responses
Research
What we learned reading every model
FAQ
