GPT-5 Codex vs Qwen3 Coder Plus

Compare GPT-5 Codex by OpenAI against Qwen3 Coder Plus by Qwen, in 3 community votes, gpt-5 codex wins 67% of head-to-head duels, tested across 50 shared challenges. Updated April 2026.

Which is better, GPT-5 Codex or Qwen3 Coder Plus?

GPT-5 Codex is the better choice overall, winning 67% of 3 blind community votes on Rival. Compare their real outputs side by side below.

Key Differences Between GPT-5 Codex and Qwen3 Coder Plus

GPT-5 Codex is made by openai while Qwen3 Coder Plus is from qwen. In community voting, In 3 community votes, GPT-5 Codex wins 67% of head-to-head duels.

In 3 community votes, GPT-5 Codex wins 67% of head-to-head duels. GPT-5 Codex leads in Reasoning. Based on blind community voting from the Rival open dataset of 3+ human preference judgments for this pair.

Reasoning: GPT-5 Codex wins 67% of votes
Our Verdict
GPT-5 Codex
GPT-5 CodexWinner
Qwen3 Coder Plus
Qwen3 Coder PlusRunner-up

Pick GPT-5 Codex. In 3 blind votes, GPT-5 Codex wins 67% of the time. That's not luck.

GPT-5 Codex particularly excels in Reasoning.

Clear winner
Writing DNA

Style Comparison

Similarity
93%

Qwen3 Coder Plus uses 3.5x more headings

GPT-5 Codex
Qwen3 Coder Plus
64%Vocabulary65%
17wSentence Length54w
0.38Hedging0.74
2.3Bold3.6
3.5Lists6.0
0.15Emoji0.15
0.49Headings1.72
0.05Transitions0.16
Based on 13 + 22 text responses
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GPT-5 CodexQwen3 Coder Plus

279 AI models invented the same fake scientist.

We read every word. 250 models. 2.14 million words. This is what we found.

AI Hallucination Index 2026
Free preview13 of 58 slides
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