GPT-5.1-Codex vs Qwen: Qwen3.5 27B
Compare GPT-5.1-Codex by OpenAI against Qwen: Qwen3.5 27B by Qwen, context windows of 400K vs 262K, tested across 52 shared challenges.
Our Verdict
GPT-5.1-Codex
Qwen: Qwen3.5 27BRunner-up
No community votes yet. On paper, GPT-5.1-Codex has the edge — bigger model tier, bigger context window, major provider backing.
Qwen: Qwen3.5 27B is 4.2x cheaper per token — worth considering if cost matters.
Too close to call
API pricing
Cost per 1M tokens
GPT-5.1-Codex
Input
$1.25
Output
$10.00
Qwen: Qwen3.5 27B
Input
$0.30
4.2× cheaper
Output
$2.40
4.2× cheaper
Qwen: Qwen3.5 27B is cheaper on both — 4.2× input, 4.2× output
Writing DNA
Style Comparison
Similarity
39%
GPT-5.1-Codex
Qwen: Qwen3.5 27B
70%Vocabulary51%
17wSentence Length15w
0.39Hedging0.32
3.4Bold7.3
3.5Lists4.8
0.00Emoji0.01
0.50Headings0.87
0.38Transitions0.19
Based on 14 + 23 text responses
Research
What we learned reading every model
FAQ
