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Gemini 3.5 Flash vs Grok 4.5

Gemini 3.5 Flash leads in 3 of 8 categories

Arena ELO

Tie

Cheaper

Gemini 3.5 Flash

Faster

Tie

Detailed Comparison

CategoryGemini 3.5 FlashGrok 4.5
ProviderGoogle xAI
Context Window1M WIN128K
Input Price ($/1M)$1.5 WINN/A
Output Price ($/1M)$9 WINN/A
Arena ELON/A N/A
CodingN/A N/A
ReasoningN/A N/A
Speed (tokens/sec)N/A N/A
Open SourceNo No

Frequently Asked Questions

Which has a larger context window?

Gemini 3.5 Flash supports 1M context, while Grok 4.5 supports 128K.

Is Gemini 3.5 Flash or Grok 4.5 open source?

Gemini 3.5 Flash is proprietary. Grok 4.5 is proprietary.

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Grok Imagine 1.5 turns prompts into 720p video

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