Claude Sonnet 4 vs Gemini 2.5 Flash Preview (thinking)

Compare Claude Sonnet 4 by Anthropic against Gemini 2.5 Flash Preview (thinking) by Google AI, in 3 community votes, claude sonnet 4 wins 67% of head-to-head duels, context windows of 200K vs 1.0M, tested across 14 shared challenges. Updated February 2026.

In 3 community votes, Claude Sonnet 4 wins 67% of head-to-head duels. Claude Sonnet 4 leads in Image Generation. Based on blind community voting from the RIVAL open dataset of 3+ human preference judgments for this pair.

Image Generation: Claude Sonnet 4 wins 100% of votes
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