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Gemini 2.5 Flash vs Grok 4.5

Gemini 2.5 Flash leads in 5 of 8 categories

Arena ELO

Gemini 2.5 Flash

Cheaper

Gemini 2.5 Flash

Faster

Gemini 2.5 Flash

Detailed Comparison

CategoryGemini 2.5 FlashGrok 4.5
ProviderGoogle xAI
Context Window1M WIN128K
Input Price ($/1M)$0.3 WINN/A
Output Price ($/1M)$2.5 WINN/A
Arena ELO1362 WINN/A
Codingunknown N/A
Reasoningunknown N/A
Speed (tokens/sec)~150 t/s WINN/A
Open SourceNo No

Frequently Asked Questions

Which is better for coding, Gemini 2.5 Flash or Grok 4.5?

Gemini 2.5 Flash scores unknown on coding benchmarks, while Grok 4.5 scores N/A.

Which has a larger context window?

Gemini 2.5 Flash supports 1M context, while Grok 4.5 supports 128K.

Is Gemini 2.5 Flash or Grok 4.5 open source?

Gemini 2.5 Flash is proprietary. Grok 4.5 is proprietary.