Moonshot AI · Chat Completions

Kimi K3.1 Pro API

Moonshot's Kimi, built for very long files and research. Served through RouterHub at $0.20 input / $1.00 output per million tokens (prices as of ).

Chat with Kimi K3.1 ProGet an API keyConnect a coding agent

Kimi K3.1 Pro pricing

−90% vs the official API price of $2.00 input / $10.00 output per 1M tokens (source, checked 2026-10-30).

Input
$0.20
Cached input
$0.02
Output
$1.00
Typical message
≈ 0.070¢

USD per 1 million tokens. A typical message is about 1,000 input and 500 output tokens. Cached input uses the cache-read rate when the provider reports a cache hit. Billed from your prepaid balance.

Compare Kimi K3.1 Pro variants

RouterHub token prices, USD per 1 million tokens
Model / exact API IDInput / 1MCached / 1MOutput / 1MContextActions
Kimi K3.1 Prokimi-k3.1-pro $2.00$0.20−90% $0.020 $10.00$1.00 1M Chat
Kimi K3.1 Pro UncensoredUncensoredkimi-k3.1-pro-uncensored $2.00$0.30−85% $0.030 $10.00$1.50 1M Chat

API compatibility and context

Exact model ID
kimi-k3.1-pro
Provider
Moonshot AI
Variant
Standard
Supported API
OpenAI-compatible Chat Completions API (/v1/chat/completions)
Availability
Available
Context window
1,048,576 tokens
Maximum input
1,048,575 tokens
Maximum output
1,048,576 tokens

Use Kimi K3.1 Pro through the API

Create a RouterHub account, add prepaid credits and create an API key. Set ROUTERHUB_API_KEY locally, then send a first request with the exact model ID.

cURL
curl --connect-timeout 30 --max-time 600 https://routerhub.si/v1/chat/completions \
  -H "Authorization: Bearer $ROUTERHUB_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model":"kimi-k3.1-pro","messages":[{"role":"user","content":"Write a short noir scene set in a lighthouse."}],"max_tokens":256}'

Python: install openai with pip. The example requests 256 output tokens and disables automatic retries, so check Usage before resending a paid request.

Python
import os
from openai import OpenAI

client = OpenAI(
    api_key=os.environ["ROUTERHUB_API_KEY"],
    base_url="https://routerhub.si/v1",
    timeout=600.0,
    max_retries=0,
)
response = client.chat.completions.create(
    model="kimi-k3.1-pro",
    messages=[{"role": "user", "content": "Write a short noir scene set in a lighthouse."}],
    max_tokens=256,
)
print(response.choices[0].message.content)

Coding tools that work with Kimi K3.1 Pro

Common questions

What is Kimi K3.1 Pro?

Kimi K3.1 Pro is a Moonshot AI language model served through RouterHub using the OpenAI-compatible Chat Completions API. Its exact API model ID is kimi-k3.1-pro.

How much does Kimi K3.1 Pro cost?

RouterHub charges $0.20 input, $0.02 cached input and $1.00 output per million tokens (prices as of 2026-11-08). A typical chat message of about 1,000 input and 500 output tokens costs about 0.070¢. Usage is billed against your prepaid balance.

What is the Kimi K3.1 Pro context window?

Context window: 1,048,576 tokens. Maximum input: 1,048,575 tokens. Maximum output: 1,048,576 tokens.

Which API does Kimi K3.1 Pro support?

Use the OpenAI-compatible Chat Completions API at https://routerhub.si/v1/chat/completions with the exact model ID kimi-k3.1-pro and your RouterHub API key (Authorization: Bearer header).

Which coding tools work with Kimi K3.1 Pro?

OpenCode, VS Code + Continue, VS Code + Cline, Hermes Agent. Each setup guide lists only compatible model IDs.

Can I try Kimi K3.1 Pro for free?

Kimi K3.1 Pro needs a free RouterHub account with prepaid credits. New accounts get $5 free on their first top-up of $20 or more.

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