ChatGPT-4o (March 2025) vs Grok 3

Compare ChatGPT-4o (March 2025) by OpenAI against Grok 3 by xAI, in 2 community votes, chatgpt-4o (march 2025) and grok 3 are closely matched, context windows of 128K vs 128K, tested across 25 shared challenges. Updated February 2026.

In 2 community votes, ChatGPT-4o (March 2025) and Grok 3 are closely matched. Based on blind community voting from the RIVAL open dataset of 2+ human preference judgments for this pair.

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