Gemini 3 Flash Preview vs Grok 4.20 Beta

Compare Gemini 3 Flash Preview by Google AI against Grok 4.20 Beta by xAI, context windows of 1.0M vs 2.0M, tested across 52 shared challenges. Updated March 2026.

Which is better, Gemini 3 Flash Preview or Grok 4.20 Beta?

Gemini 3 Flash Preview and Grok 4.20 Beta are both competitive models. Gemini 3 Flash Preview costs $0.5/M input tokens vs $2/M for Grok 4.20 Beta. Context windows: 1049K vs 2000K tokens. Compare their real outputs side by side below.

Key Differences Between Gemini 3 Flash Preview and Grok 4.20 Beta

Gemini 3 Flash Preview is made by google while Grok 4.20 Beta is from xai. Gemini 3 Flash Preview has a 1049K token context window compared to Grok 4.20 Beta's 2000K. On pricing, Gemini 3 Flash Preview costs $0.5/M input tokens vs $2/M for Grok 4.20 Beta.

Our Verdict
Grok 4.20 Beta
Grok 4.20 Beta
Gemini 3 Flash Preview
Gemini 3 Flash PreviewRunner-up

No community votes yet. On paper, Grok 4.20 Beta has the edge — bigger model tier, newer, bigger context window.

Slight edge
FAQ

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