How much does Kimi K3.1 Pro cost?

Kimi K3.1 Pro is billed pay-as-you-go at $2.20 per 1M input tokens and $11.00 per 1M output tokens. There is no subscription — you only pay for what you use.

What can Kimi K3.1 Pro do?

Kimi K3.1 Pro supports Vision, Tool calling.

Is Kimi K3.1 Pro free to use?

Kimi K3.1 Pro is a paid, pay-as-you-go model — no subscription, you are only charged for usage.

How do I use Kimi K3.1 Pro via the API?

Kimi K3.1 Pro is OpenAI-compatible. Point any OpenAI SDK at https://api.airforce/v1 and pass the model ID kimi-k3.1-pro with your Api.Airforce API key.

Who makes Kimi K3.1 Pro?

Kimi K3.1 Pro is Moonshot AI's chat model, served through the unified Api.Airforce gateway alongside 100+ other models.

Moonshot AIPaidOperational

Kimi K3.1 Pro

API model name: kimi-k3.1-pro

Kimi K3.1 Pro is Moonshot AI's chat model, served on the Api.Airforce unified API. Capabilities include Vision, Tool calling. It is priced at $2.20 per million input tokens and $11.00 per million output tokens. That is below the provider's $2.00 official input rate. Access it through the OpenAI-compatible API with one key, alongside 100+ other models on Api.Airforce.

Get an API key View pricing

Pricing

Input / 1M tokens

$2.20

Output / 1M tokens

$11.00

Cache read / 1M tokens

$0.22

Cache write / 1M tokens

$2.75

Official input rate

$2.00

Official output rate

$10.00

Api.Airforce price vs. the provider's official rate.

Specifications

Provider: Moonshot AI
Type: chat model

Capabilities

VisionTool calling

What is Kimi K3.1 Pro used for?

Chatbots & assistants — conversational AI, drafting, summarizing and Q&A.
Image understanding — analyze photos, screenshots, charts and scanned documents.
Agents & automation — function calling and tool use for multi-step workflows.

Kimi K3.1 Pro vs. similar models

Model	Intelligence	Context	Input / 1M	Output / 1M
Kimi K3.1 Pro	—	—	$2.20	$11.00
GPT-5.4 Low OpenAI Compact	—	—	$1.30	$7.78
GPT-5.4 Medium OpenAI Compact	—	—	$1.30	$7.78
GPT-5.4 Mini	24.1	—	$0.45	$2.20

Prices are Api.Airforce pay-as-you-go rates per 1M tokens. Context is the maximum input length.

Kimi K3.1 Pro — frequently asked questions

How much does Kimi K3.1 Pro cost?: Kimi K3.1 Pro is billed pay-as-you-go at $2.20 per 1M input tokens and $11.00 per 1M output tokens. There is no subscription — you only pay for what you use.
What can Kimi K3.1 Pro do?: Kimi K3.1 Pro supports Vision, Tool calling.
Is Kimi K3.1 Pro free to use?: Kimi K3.1 Pro is a paid, pay-as-you-go model — no subscription, you are only charged for usage.
How do I use Kimi K3.1 Pro via the API?: Kimi K3.1 Pro is OpenAI-compatible. Point any OpenAI SDK at https://api.airforce/v1 and pass the model ID kimi-k3.1-pro with your Api.Airforce API key.
Who makes Kimi K3.1 Pro?: Kimi K3.1 Pro is Moonshot AI's chat model, served through the unified Api.Airforce gateway alongside 100+ other models.

All models·Quickstart·Chat API reference

Use Kimi K3.1 Pro via the API

OpenAI-compatible — point any OpenAI SDK at https://api.airforce/v1 and pass kimi-k3.1-pro as the model.

cURL

curl https://api.airforce/v1/chat/completions \
  -H "Authorization: Bearer $AIRFORCE_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "kimi-k3.1-pro",
    "messages": [{ "role": "user", "content": "Hello!" }]
  }'

Python

from openai import OpenAI
client = OpenAI(base_url="https://api.airforce/v1", api_key="$AIRFORCE_API_KEY")
r = client.chat.completions.create(
    model="kimi-k3.1-pro",
    messages=[{"role": "user", "content": "Hello!"}],
)
print(r.choices[0].message.content)

JavaScript

import OpenAI from "openai";
const client = new OpenAI({ baseURL: "https://api.airforce/v1", apiKey: process.env.AIRFORCE_API_KEY });
const r = await client.chat.completions.create({
  model: "kimi-k3.1-pro",
  messages: [{ role: "user", content: "Hello!" }],
});
console.log(r.choices[0].message.content);