Claude Opus 4.1 vs GPT-4.5

Compare Claude Opus 4.1 by Anthropic against GPT-4.5 by OpenAI, in 14 community votes, claude opus 4.1 wins 92% of head-to-head duels, context windows of 200K vs 128K, tested across 11 shared challenges. Updated February 2026.

In 14 community votes, Claude Opus 4.1 wins 92% of head-to-head duels. Claude Opus 4.1 leads in Web Design, Image Generation, Reasoning. Based on blind community voting from the RIVAL open dataset of 14+ human preference judgments for this pair.

Web Design: Claude Opus 4.1 wins 100% of votes
Image Generation: Claude Opus 4.1 wins 100% of votes
Reasoning: Claude Opus 4.1 wins 67% of votes
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