Get an API key

Kimi K3 API

  • $2.10 per 1M input tokens
  • $10.50 per 1M output tokens

Kimi K3, 30% under list.

We serve Kimi K3, Moonshot AI’s open-weight model, through an OpenAI-compatible API (ARC isn’t affiliated with Moonshot).

What you get

The real model, through an OpenAI-compatible API.

  • 01

    The real model

    It’s the real model: Moonshot’s official K3 checkpoint, unmodified.

  • 02

    OpenAI-compatible

    Use the OpenAI SDK with the base URL we send with your key and the model name kimi-k3.

  • 03

    Your data

    We don’t keep live requests at all, delete batch files 24 hours after a job finishes, don’t train on your data, and process in the United States.

Pricing

Live and batch.

  • Live

    30% under K3’s list price.

    Input
    $2.10
    Cached input
    $0.21
    Output
    $10.50
  • Batch

    Up to 70% under list, with results within 24 hours.

    Input
    $1.00
    Cached input
    $0.10
    Output
    $4.50

Prices per 1M tokens, in US dollars.

Get started

Email tj@arc.ai for an API key.

We send the base URL with your key. Then call Kimi K3 with the OpenAI SDK:

import os
from openai import OpenAI

client = OpenAI(
    base_url=os.environ["ARC_BASE_URL"],  # the base URL we send with your key
    api_key=os.environ["ARC_API_KEY"],
)

response = client.chat.completions.create(
    model="kimi-k3",
    messages=[{"role": "user", "content": "Hello"}],
)
print(response.choices[0].message.content)

Or copy the address: tj@arc.ai