Grok Code Fast 1 vs Claude Opus 4

Compare Grok Code Fast 1 by xAI against Claude Opus 4 by Anthropic, in 5 community votes, claude opus 4 wins 80% of head-to-head duels, context windows of 256K vs 200K, tested across 32 shared challenges. Updated February 2026.

In 5 community votes, Claude Opus 4 wins 80% of head-to-head duels. Claude Opus 4 leads in Image Generation. Based on blind community voting from the RIVAL open dataset of 5+ human preference judgments for this pair.

Image Generation: Claude Opus 4 wins 100% of votes
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