GPT-5.6 Luna Pro vs Kimi K3.1 Pro

Price, context window & benchmark comparison

GPT-5.6 Luna Pro

OpenAI

$0.20 / $1.20

Input / Output · per 1M tokens

Kimi K3.1 Pro

Moonshot AI

$2.00 / $10.00

Input / Output · per 1M tokens

Compare different models

Verdict: GPT-5.6 Luna Pro is 8.9× cheaper than Kimi K3.1 Pro on a typical 3:1 input/output mix. GPT-5.6 Luna Pro has the larger context window (1.1M vs 1M).

	GPT-5.6 Luna Pro	Kimi K3.1 Pro
Input price / 1M	$0.20	$2.00
Output price / 1M	$1.20	$10.00
Blended price (3:1)	$0.45	$4.00
Cached input / 1M	$0.02	$0.20
Context window	1.1M	1M
Max output	128K	944K
Intelligence index	—	46.5
Coding index	—	—
Providers	5	23
Best provider uptime (30m)	100.0%	100.0%
Vision input	Yes	Yes
Reasoning	Yes	Yes
Tool calling	Yes	Yes
Released	2026-07-09	2026-10-23
Retirement	—	—

Cost calculator

Input tokens / requestOutput tokens / requestRequests / day

FAQ

Which is cheaper, GPT-5.6 Luna Pro or Kimi K3.1 Pro?

GPT-5.6 Luna Pro is 8.9× cheaper than Kimi K3.1 Pro on a typical 3:1 input/output mix.

GPT-5.6 Luna Pro vs Kimi K3.1 Pro: which has a bigger context window?

GPT-5.6 Luna Pro: 1,050,000 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: GPT-5.6 Luna Pro ≈ $1,000, Kimi K3.1 Pro ≈ $9,000.

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