GPT-5.3-Codex vs Qwen3.5 9B
Compare GPT-5.3-Codex by OpenAI against Qwen3.5 9B by Qwen, context windows of 400K vs 262K, tested across 51 shared challenges.
Our Verdict
GPT-5.3-Codex
Qwen3.5 9BRunner-up
No community votes yet. On paper, GPT-5.3-Codex has the edge — bigger model tier, bigger context window, major provider backing.
Qwen3.5 9B is 93x 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
Qwen3.5 9B
Input
$0.10
18× cheaper
Output
$0.15
93× cheaper
Qwen3.5 9B is cheaper on both — 18× input, 93× output
Writing DNA
Style Comparison
Similarity
37%
GPT-5.3-Codex uses 15.8x more emoji
GPT-5.3-Codex
Qwen3.5 9B
65%Vocabulary47%
23wSentence Length15w
0.51Hedging0.41
6.5Bold6.9
6.2Lists4.8
0.16Emoji0.00
1.90Headings0.91
0.03Transitions0.12
Based on 23 + 21 text responses
Research
What we learned reading every model
FAQ
