GPT-5 Codex
Nothing here. The model returned empty. We stared at it for a while.
GPT-5 Codex vs xAI: Grok 4
Compare GPT-5 Codex by OpenAI against xAI: Grok 4 by xAI, in 1 community votes, gpt-5 codex wins 100% of head-to-head duels, tested across 35 shared challenges. Updated April 2026.
Which is better, GPT-5 Codex or xAI: Grok 4?
GPT-5 Codex is the better choice overall, winning 100% of 1 blind community votes on Rival. Compare their real outputs side by side below.
Key Differences Between GPT-5 Codex and xAI: Grok 4
GPT-5 Codex is made by openai while xAI: Grok 4 is from xai. In community voting, In 1 community votes, GPT-5 Codex wins 100% of head-to-head duels.
In 1 community votes, GPT-5 Codex wins 100% of head-to-head duels. Based on blind community voting from the Rival open dataset of 1+ human preference judgments for this pair.
Our Verdict
GPT-5 CodexWinner
xAI: Grok 4Runner-up
Pick GPT-5 Codex. In 1 blind votes, GPT-5 Codex wins 100% of the time. That's not luck.
Clear winner
Writing DNA
Style Comparison
Similarity
99%
GPT-5 Codex uses 2.1x more emoji
GPT-5 Codex
xAI: Grok 4
64%Vocabulary53%
17wSentence Length18w
0.38Hedging0.67
2.3Bold2.7
3.5Lists2.7
0.15Emoji0.07
0.49Headings0.86
0.05Transitions0.04
Based on 13 + 21 text responses
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