GPT-5 Codex vs GPT-5.1-Codex
Compare GPT-5 Codex and GPT-5.1-Codex, both from OpenAI, in 24 community votes, gpt-5 codex wins 53% of head-to-head duels, tested across 50 shared challenges. Updated April 2026.
Which is better, GPT-5 Codex or GPT-5.1-Codex?
GPT-5 Codex is the better choice overall, winning 53% of 24 blind community votes on Rival. Compare their real outputs side by side below.
Key Differences Between GPT-5 Codex and GPT-5.1-Codex
GPT-5 Codex is made by openai while GPT-5.1-Codex is from openai. In community voting, In 24 community votes, GPT-5 Codex wins 53% of head-to-head duels.
In 24 community votes, GPT-5 Codex wins 53% of head-to-head duels. GPT-5 Codex leads in Image Generation, while GPT-5.1-Codex leads in Reasoning. Based on blind community voting from the Rival open dataset of 24+ human preference judgments for this pair.
GPT-5 Codex has the edge overall. In 24 blind votes, GPT-5 Codex wins 53% of the time.
Pick GPT-5 Codex for Image Generation. Pick GPT-5.1-Codex for Reasoning.
Style Comparison
GPT-5 Codex uses 14.6x more emoji
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279 AI models invented the same fake scientist.
We read every word. 250 models. 2.14 million words. This is what we found.
