Gemini 3.8 Flash vs Kimi K3.1 Pro

Price, context window & benchmark comparison

Gemini 3.8 Flash

Google

$0.82 / $4.13

Input / Output · per 1M tokens

Kimi K3.1 Pro

Moonshot AI

$2.00 / $10.00

Input / Output · per 1M tokens

Compare different models

Verdict: Gemini 3.8 Flash is 2.4× cheaper than Kimi K3.1 Pro on a typical 3:1 input/output mix. Kimi K3.1 Pro scores higher on the Artificial Analysis Intelligence Index (46.5 vs 30.8).

	Gemini 3.8 Flash	Kimi K3.1 Pro
Input price / 1M	$0.82	$2.00
Output price / 1M	$4.13	$10.00
Blended price (3:1)	$1.65	$4.00
Cached input / 1M	$0.0825	$0.20
Context window	1M	1M
Max output	66K	944K
Intelligence index	30.8	46.5
Coding index	76.3	—
Providers	7	23
Best provider uptime (30m)	100.0%	100.0%
Vision input	Yes	Yes
Reasoning	Yes	Yes
Tool calling	Yes	Yes
Released	2026-09-02	2026-10-23
Retirement	—	—

Cost calculator

Input tokens / requestOutput tokens / requestRequests / day

FAQ

Which is cheaper, Gemini 3.8 Flash or Kimi K3.1 Pro?

Gemini 3.8 Flash is 2.4× cheaper than Kimi K3.1 Pro on a typical 3:1 input/output mix.

Gemini 3.8 Flash vs Kimi K3.1 Pro: which has a bigger context window?

Gemini 3.8 Flash: 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 3.8 Flash ≈ $3,713, Kimi K3.1 Pro ≈ $9,000.

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