Gemini 2.5 Pro Experimental vs GPT-5 Codex

Compare Gemini 2.5 Pro Experimental by Google AI against GPT-5 Codex by OpenAI, in 1 community votes, gpt-5 codex wins 100% of head-to-head duels, tested across 42 shared challenges. Updated February 2026.

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.

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