GPT-5 Codex vs GPT-5 Pro

Compare GPT-5 Codex and GPT-5 Pro, both from OpenAI, in 6 community votes, gpt-5 pro wins 67% of head-to-head duels, tested across 40 shared challenges. Updated April 2026.

Which is better, GPT-5 Codex or GPT-5 Pro?

GPT-5 Pro is the better choice overall, winning 67% of 6 blind community votes on Rival. Compare their real outputs side by side below.

Key Differences Between GPT-5 Codex and GPT-5 Pro

GPT-5 Codex is made by openai while GPT-5 Pro is from openai. In community voting, In 6 community votes, GPT-5 Pro wins 67% of head-to-head duels.

In 6 community votes, GPT-5 Pro wins 67% of head-to-head duels. GPT-5 Pro has the edge overall, but performance varies by task type. Based on blind community voting from the Rival open dataset of 6+ human preference judgments for this pair.

Image Generation: GPT-5 Codex and GPT-5 Pro are tied
Our Verdict
GPT-5 Pro
GPT-5 ProWinner
GPT-5 Codex
GPT-5 CodexRunner-up

Pick GPT-5 Pro. In 6 blind votes, GPT-5 Pro wins 67% of the time. That's not luck.

Clear winner
Writing DNA

Style Comparison

Similarity
100%

GPT-5 Codex uses 229.7x more bold

GPT-5 Codex
GPT-5 Pro
64%Vocabulary65%
17wSentence Length15w
0.38Hedging0.32
2.3Bold0.0
3.5Lists2.9
0.15Emoji0.00
0.49Headings0.00
0.05Transitions0.01
Based on 13 + 11 text responses
vs

Ask them anything yourself

GPT-5 CodexGPT-5 Pro

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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