Claude Sonnet 4.5 vs Qwen: Qwen3.5 Plus 2026-02-15
Compare Claude Sonnet 4.5 by Anthropic against Qwen: Qwen3.5 Plus 2026-02-15 by Qwen, in 5 community votes, qwen: qwen3.5 plus 2026-02-15 wins 100% of head-to-head duels, context windows of 200K vs 1.0M, tested across 42 shared challenges.
Web Design: Qwen: Qwen3.5 Plus 2026-02-15 wins 100% of votes
Our Verdict
Qwen: Qwen3.5 Plus 2026-02-15Winner
Claude Sonnet 4.5Runner-up
Pick Qwen: Qwen3.5 Plus 2026-02-15. In 5 blind votes, Qwen: Qwen3.5 Plus 2026-02-15 wins 100% of the time. That's not luck.
Qwen: Qwen3.5 Plus 2026-02-15 particularly excels in Web Design. Qwen: Qwen3.5 Plus 2026-02-15 is 6.3x cheaper per token — worth considering if cost matters.
Clear winner
API pricing
Cost per 1M tokens
Claude Sonnet 4.5
Input
$3.00
Output
$15.00
Qwen: Qwen3.5 Plus 2026-02-15
Input
$0.40
7.5× cheaper
Output
$2.40
6.3× cheaper
Qwen: Qwen3.5 Plus 2026-02-15 is cheaper on both — 7.5× input, 6.3× output
Writing DNA
Style Comparison
Similarity
38%
Claude Sonnet 4.5 uses 5.3x more sentence length
Claude Sonnet 4.5
Qwen: Qwen3.5 Plus 2026-02-15
64%Vocabulary54%
94wSentence Length18w
0.48Hedging0.51
4.9Bold5.3
8.0Lists2.9
0.45Emoji0.10
1.91Headings0.75
0.07Transitions0.09
Based on 20 + 23 text responses
Research
What we learned reading every model
FAQ
