GPT-5 Codex
Nothing here. The model returned empty. We stared at it for a while.
GPT-5 Codex vs Qwen3 Coder
Compare GPT-5 Codex by OpenAI against Qwen3 Coder by Qwen, tested across 37 shared challenges. Updated April 2026.
Which is better, GPT-5 Codex or Qwen3 Coder?
GPT-5 Codex and Qwen3 Coder are both competitive models. Compare their real outputs side by side below.
Key Differences Between GPT-5 Codex and Qwen3 Coder
GPT-5 Codex is made by openai while Qwen3 Coder is from qwen.
Our Verdict
GPT-5 Codex
Qwen3 CoderRunner-up
No community votes yet. On paper, GPT-5 Codex has the edge — newer, major provider backing.
Too close to call
Writing DNA
Style Comparison
Similarity
93%
Qwen3 Coder uses 4.2x more sentence length
GPT-5 Codex
Qwen3 Coder
64%Vocabulary61%
17wSentence Length72w
0.38Hedging0.61
2.3Bold4.7
3.5Lists5.6
0.15Emoji0.12
0.49Headings1.43
0.05Transitions0.20
Based on 13 + 22 text responses
vsAsk them anything yourself
Some models write identically. You are paying for the brand.
178 models fingerprinted across 32 writing dimensions. Free research.
Model Similarity Index
185x
price gap between models that write identically
178
models
12
clone pairs
32
dimensions
Devstral M / S
95.7%
Qwen3 Coder / Flash
95.6%
GPT-5.4 / Mini
93.3%
279 AI models invented the same fake scientist.
We read every word. 250 models. 2.14 million words. This is what we found.
Free preview13 of 58 slides
FAQ