DeepSeek R1 vs GPT-5 Codex

Compare DeepSeek R1 by DeepSeek against GPT-5 Codex by OpenAI, in 2 community votes, gpt-5 codex wins 100% of head-to-head duels, tested across 42 shared challenges. Updated February 2026.

In 2 community votes, GPT-5 Codex wins 100% of head-to-head duels. GPT-5 Codex leads in Conversation. Based on blind community voting from the RIVAL open dataset of 2+ human preference judgments for this pair.

Conversation: GPT-5 Codex wins 100% of votes
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