DeepSeek V4.1 Flash vs Gemini 3.1 Pro Preview Custom Tools

Price, context window & benchmark comparison

DeepSeek

$0.022 / $0.40

Input / Output · per 1M tokens

Google

$2.00 / $12.00

Input / Output · per 1M tokens

Compare different models

Verdict: DeepSeek V4.1 Flash is 38.6× cheaper than Gemini 3.1 Pro Preview Custom Tools on a typical 3:1 input/output mix.

	DeepSeek V4.1 Flash	Gemini 3.1 Pro Preview Custom Tools
Input price / 1M	$0.022	$2.00
Output price / 1M	$0.40	$12.00
Blended price (3:1)	$0.12	$4.50
Cached input / 1M	$0.004	$0.20
Context window	1M	1M
Max output	944K	66K
Intelligence index	—	—
Coding index	—	—
Providers	36	—
Best provider uptime (30m)	100.0%	—
Vision input	Yes	Yes
Reasoning	Yes	Yes
Tool calling	Yes	Yes
Released	2026-09-10	2026-02-25
Retirement	—	—

Input tokens / requestOutput tokens / requestRequests / day

Which is cheaper, DeepSeek V4.1 Flash or Gemini 3.1 Pro Preview Custom Tools?

DeepSeek V4.1 Flash is 38.6× cheaper than Gemini 3.1 Pro Preview Custom Tools on a typical 3:1 input/output mix.

DeepSeek V4.1 Flash vs Gemini 3.1 Pro Preview Custom Tools: which has a bigger context window?

DeepSeek V4.1 Flash: 1,048,576 tokens. Gemini 3.1 Pro Preview Custom Tools: 1,048,576 tokens.

How much would 1 million requests cost?

At 2,000 input + 500 output tokens per request: DeepSeek V4.1 Flash ≈ $244.00, Gemini 3.1 Pro Preview Custom Tools ≈ $10,000.

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