GPT-5 vs Grok 3 Thinking

Compare GPT-5 by OpenAI against Grok 3 Thinking by xAI, in 4 community votes, grok 3 thinking wins 75% of head-to-head duels, context windows of 400K vs 128K, tested across 14 shared challenges. Updated February 2026.

In 4 community votes, Grok 3 Thinking wins 75% of head-to-head duels. Grok 3 Thinking has the edge overall, but performance varies by task type. Based on blind community voting from the RIVAL open dataset of 4+ human preference judgments for this pair.

Reasoning: GPT-5 and Grok 3 Thinking are tied
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