Qwen: Qwen3.5 Flash vs Sonar Pro Search
Compare Qwen: Qwen3.5 Flash by Qwen against Sonar Pro Search by Perplexity, context windows of 1.0M vs 200K, tested across 52 shared challenges.
Our Verdict
Qwen: Qwen3.5 Flash
Sonar Pro Search
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
Qwen: Qwen3.5 Flash
Input
$0.10
30× cheaper
Output
$0.40
38× cheaper
Sonar Pro Search
Input
$3.00
Output
$15.00
Qwen: Qwen3.5 Flash is cheaper on both — 30× input, 38× output
Writing DNA
Style Comparison
Similarity
45%
Qwen: Qwen3.5 Flash uses 2.5x more emoji
Qwen: Qwen3.5 Flash
Sonar Pro Search
50%Vocabulary60%
14wSentence Length22w
0.35Hedging0.30
6.9Bold2.7
4.2Lists2.6
0.03Emoji0.00
1.00Headings2.08
0.15Transitions0.07
Based on 23 + 25 text responses
Research
What we learned reading every model
FAQ
