DeepSeek V4-Pro vs Gemini 3.5 Flash

Gemini 3.5 Flash leads in 3 of 8 categories

Arena ELO

Tie

Cheaper

Gemini 3.5 Flash

Faster

Tie

Detailed Comparison

Category	DeepSeek V4-Pro	Gemini 3.5 Flash
Provider	DeepSeek	Google
Context Window	128K	1M WIN
Input Price ($/1M)	N/A	$1.5 WIN
Output Price ($/1M)	N/A	$9 WIN
Arena ELO	N/A	N/A
Coding	N/A	N/A
Reasoning	N/A	N/A
Speed (tokens/sec)	N/A	N/A
Open Source	No	No

Frequently Asked Questions

Which has a larger context window?

DeepSeek V4-Pro supports 128K context, while Gemini 3.5 Flash supports 1M.

Is DeepSeek V4-Pro or Gemini 3.5 Flash open source?

DeepSeek V4-Pro is proprietary. Gemini 3.5 Flash is proprietary.

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