GPT-5.3-Codex vs Qwen: Qwen3.5 27B
Compare GPT-5.3-Codex by OpenAI against Qwen: Qwen3.5 27B by Qwen, context windows of 400K vs 262K, tested across 53 shared challenges.
Our Verdict
GPT-5.3-Codex
Qwen: Qwen3.5 27BRunner-up
No community votes yet. On paper, GPT-5.3-Codex has the edge — bigger model tier, bigger context window, major provider backing.
Qwen: Qwen3.5 27B is 5.8x cheaper per token — worth considering if cost matters.
Slight edge
API pricing
Cost per 1M tokens
GPT-5.3-Codex
Input
$1.75
Output
$14.00
Qwen: Qwen3.5 27B
Input
$0.30
5.8× cheaper
Output
$2.40
5.8× cheaper
Qwen: Qwen3.5 27B is cheaper on both — 5.8× input, 5.8× output
Writing DNA
Style Comparison
Similarity
44%
GPT-5.3-Codex uses 15.8x more emoji
GPT-5.3-Codex
Qwen: Qwen3.5 27B
65%Vocabulary51%
23wSentence Length15w
0.51Hedging0.32
6.5Bold7.3
6.2Lists4.8
0.16Emoji0.01
1.90Headings0.87
0.03Transitions0.19
Based on 23 + 23 text responses
Research
What we learned reading every model
FAQ
