Gemini 2.5 Flash Preview (thinking) vs Grok 3

Compare Gemini 2.5 Flash Preview (thinking) by Google AI against Grok 3 by xAI, context windows of 1.0M vs 128K, tested across 19 shared challenges. Updated April 2026.

Which is better, Gemini 2.5 Flash Preview (thinking) or Grok 3?

Gemini 2.5 Flash Preview (thinking) and Grok 3 are both competitive models. Context windows: 1049K vs 128K tokens. Compare their real outputs side by side below.

Key Differences Between Gemini 2.5 Flash Preview (thinking) and Grok 3

Gemini 2.5 Flash Preview (thinking) is made by google while Grok 3 is from xai. Gemini 2.5 Flash Preview (thinking) has a 1049K token context window compared to Grok 3's 128K.

Our Verdict
Gemini 2.5 Flash Preview (thinking)
Gemini 2.5 Flash Preview (thinking)
Grok 3
Grok 3

No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.

Too close to call
Writing DNA

Style Comparison

Similarity
95%

Grok 3 uses 3.9x more emoji

Gemini 2.5 Flash Preview (thinking)
Grok 3
53%Vocabulary49%
14wSentence Length18w
0.38Hedging0.94
4.4Bold2.5
4.1Lists3.0
0.00Emoji0.04
0.00Headings0.65
0.24Transitions0.08
Based on 7 + 17 text responses
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Gemini 2.5 Flash Preview (thinking)Grok 3

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