DeepSeek R1 vs Gemini 2.5 Flash Preview

Compare DeepSeek R1 by DeepSeek against Gemini 2.5 Flash Preview by Google AI, in 1 community votes, deepseek r1 wins 100% of head-to-head duels, context windows of 128K vs 1.0M, tested across 22 shared challenges. Updated February 2026.

In 1 community votes, DeepSeek R1 wins 100% of head-to-head duels. Based on blind community voting from the RIVAL open dataset of 1+ human preference judgments for this pair.

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