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Gemini 2.5 Flash vs Kimi K2

Gemini 2.5 Flash leads in 3 of 8 categories

Arena ELO

Kimi K2

Cheaper

Gemini 2.5 Flash

Faster

Gemini 2.5 Flash

Detailed Comparison

CategoryGemini 2.5 FlashKimi K2
ProviderGoogle Moonshot
Context Window1M WIN128K
Input Price ($/1M)$0.3 WIN$0.55
Output Price ($/1M)$2.5 $2.2 WIN
Arena ELO1362 1380 WIN
Codingunknown 65.8% SWE-bench
Reasoningunknown 60.2% BrowseComp
Speed (tokens/sec)~150 t/s WIN~50 t/s
Open SourceNo Yes

Frequently Asked Questions

Which is cheaper, Gemini 2.5 Flash or Kimi K2?

Kimi K2 is approximately 2% cheaper than Gemini 2.5 Flash per million tokens.

Which is better for coding, Gemini 2.5 Flash or Kimi K2?

Gemini 2.5 Flash scores unknown on coding benchmarks, while Kimi K2 scores 65.8% SWE-bench.

Which has a larger context window?

Gemini 2.5 Flash supports 1M context, while Kimi K2 supports 128K.

Is Gemini 2.5 Flash or Kimi K2 open source?

Gemini 2.5 Flash is proprietary. Kimi K2 is open source.

Which ranks higher on the Chatbot Arena leaderboard?

Kimi K2 ranks higher with ELO 1380 vs 1362.

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