DeepSeek R1 vs Gemini 3.5 Flash
Compare DeepSeek R1 by DeepSeek against Gemini 3.5 Flash by Google AI, context windows of 128K vs 1.0M, tested across 53 shared challenges. Updated May 2026.
Which is better, DeepSeek R1 or Gemini 3.5 Flash?
DeepSeek R1 and Gemini 3.5 Flash are both competitive models. DeepSeek R1 costs $0.55/M input tokens vs $1.5/M for Gemini 3.5 Flash. Context windows: 128K vs 1049K tokens. Compare their real outputs side by side below.
Key Differences Between DeepSeek R1 and Gemini 3.5 Flash
DeepSeek R1 is made by deepseek while Gemini 3.5 Flash is from google. DeepSeek R1 has a 128K token context window compared to Gemini 3.5 Flash's 1049K. On pricing, DeepSeek R1 costs $0.55/M input tokens vs $1.5/M for Gemini 3.5 Flash.
Per 1M tokens
DeepSeek R1 is cheaper on both — 2.7× input, 4.1× output
No community votes yet. On paper, Gemini 3.5 Flash has the edge — newer, bigger context window.
DeepSeek R1 is 4.1x cheaper per token — worth considering if cost matters.
Style Comparison
DeepSeek R1 uses 4.3x more emoji
