GPT-5 Codex vs GPT-5

Compare GPT-5 Codex and GPT-5, both from OpenAI, in 151 community votes, gpt-5 codex wins 64% of head-to-head duels, tested across 44 shared challenges. Updated February 2026.

In 151 community votes, GPT-5 Codex wins 64% of head-to-head duels. GPT-5 Codex leads in Web Design, Reasoning, Conversation, while GPT-5 leads in Image Generation. Based on blind community voting from the RIVAL open dataset of 151+ human preference judgments for this pair.