Gemini 3.1 Pro Preview Custom Tools vs Kimi K3.1 Pro

Price, context window & benchmark comparison

Google

$2.00 / $12.00

Input / Output · per 1M tokens

Moonshot AI

$2.00 / $10.00

Input / Output · per 1M tokens

Compare different models

Verdict: Kimi K3.1 Pro is 11% cheaper than Gemini 3.1 Pro Preview Custom Tools on a typical 3:1 input/output mix.

	Gemini 3.1 Pro Preview Custom Tools	Kimi K3.1 Pro
Input price / 1M	$2.00	$2.00
Output price / 1M	$12.00	$10.00
Blended price (3:1)	$4.50	$4.00
Cached input / 1M	$0.20	$0.20
Context window	1M	1M
Max output	66K	944K
Intelligence index	—	46.5
Coding index	—	—
Providers	—	23
Best provider uptime (30m)	—	100.0%
Vision input	Yes	Yes
Reasoning	Yes	Yes
Tool calling	Yes	Yes
Released	2026-02-25	2026-10-23
Retirement	—	—

Input tokens / requestOutput tokens / requestRequests / day

Which is cheaper, Gemini 3.1 Pro Preview Custom Tools or Kimi K3.1 Pro?

Kimi K3.1 Pro is 11% cheaper than Gemini 3.1 Pro Preview Custom Tools on a typical 3:1 input/output mix.

Gemini 3.1 Pro Preview Custom Tools vs Kimi K3.1 Pro: which has a bigger context window?

Gemini 3.1 Pro Preview Custom Tools: 1,048,576 tokens. Kimi K3.1 Pro: 1,048,576 tokens.

How much would 1 million requests cost?

At 2,000 input + 500 output tokens per request: Gemini 3.1 Pro Preview Custom Tools ≈ $10,000, Kimi K3.1 Pro ≈ $9,000.

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