Cheap Kimi K3 API

What a top-up buys on Kimi K3

Output-token count only; input tokens are cheaper. First top-up is at least 2.5×.

When to pick Kimi K3

Kimi K3 costs $0.01 per 1,500-in/500-out request at list price, $0.0060 effective. It sits in the mid price range — a good default for production apps.

Kimi K3 vs similarly priced models

Nearest models to Kimi K3 by blended price (3 input : 1 output). All run on one Somnus key.

Getting the most out of Kimi K3 for less

• Input is 5.0× cheaper than output on Kimi K3, so long context with short answers is the cheapest pattern.
• A $200 top-up gives $500 credit — about 83M blended Kimi K3 tokens.
• Mix models: send easy steps to DeepSeek V4 Flash and keep Kimi K3 for the steps that need it.

Use Kimi K3

import OpenAI from "openai";

const client = new OpenAI({
  apiKey: process.env.SOMNUS_API_KEY,
  baseURL: "https://gateway-production-c837.up.railway.app/v1",
});

const resp = await client.chat.completions.create({
  model: "claude-sonnet-5",
  messages: [
    {"role": "user", "content": "Summarise this in one line"}
  ],
});
console.log(resp.choices[0].message.content);

Copy the exact model id from your dashboard.

Questions

Related