Kimi K3 API — pricing, playground & code

Name: Kimi K3 API
Brand: Moonshot AI

Overview

About Kimi K3

Agentic coding model with strong multi-step tool use. Every model on CompanyFabric shares the same API key, billing balance, and rate-limit envelope — one integration covers the entire library.

Facts

At a glance

Availability

Live

Pricing

$1.2/Mtok in

Metered exactly per call

Context window

256k tokens

Commercial use

See license

Commercial output use permitted per Moonshot terms.

Variants

All endpoints

Kimi K3

$1.2/Mtok in

Agentic coding model with strong multi-step tool use.

Chat Completions

Prompt library

Example runs

Refactor this 300-line route handler into service + validation layers.

// services/orders.ts…

This exact run cost $0.011

Quickstart

How to use the Kimi K3 API

1
Create a free CompanyFabric account — starter credits are included, no card required.
2
Copy your API key from the dashboard. One key covers every model in the library.
3
Point any OpenAI SDK at api.companyfabric.com/v1 and set model to "moonshotai/kimi-k3".
4
Read the exact metered cost of the call from the response — the same number shown in the playground.

Use cases

What teams build with it

Coding agents

Agentic edit loops, repo comprehension, and tool-driven refactors.

coding agenttool use

Autocomplete & FIM

Editor completions and fill-in-the-middle at latency and prices built for every keystroke.

autocompletefim

Bulk code generation

Test scaffolding, migrations, and boilerplate at commodity cost — reviewed by a frontier model.

codegentests

Get better output

Prompting tips

Give the failing test or error output verbatim — it beats describing the bug.
Constrain the diff: name the files in scope and forbid drive-by refactors.
Ask for the plan before the patch on multi-file changes.

Exact, metered, prepaid

Pricing

Endpoint	Type	Price
Kimi K3	Chat	$1.2 / M input · $3.6 / M output

Production-grade

Code samples

import OpenAI from "openai"

const client = new OpenAI({
  baseURL: "https://api.companyfabric.com/v1",
  apiKey: process.env.COMPANYFABRIC_API_KEY,
})

const res = await client.chat.completions.create({
  model: "moonshotai/kimi-k3",
  max_tokens: 1024,
  temperature: 0.7,
  messages: [{ role: "user", content: "Say hello from the fabric." }],
})

console.log(res.choices[0].message.content)

Playground

Try it in the browser

Playground$1.2 in / $3.6 out per 1M tokens

Model

Max output tokens

Prompt

≈ $0.0037

Comparisons

Kimi K3 vs the alternatives

Kimi K3 vs Qwen3 Coder

Kimi K3 and Qwen3 Coder compete for the same code workloads. Both run behind the same CompanyFabric key at exact metered prices — A/B them on your real prompts and let the outputs decide, then switch with a one-line change.

Kimi K3 vs Claude Sonnet 4.5

Kimi K3 and Claude Sonnet 4.5 compete for the same code workloads. Both run behind the same CompanyFabric key at exact metered prices — A/B them on your real prompts and let the outputs decide, then switch with a one-line change.

FAQ

Frequently asked questions

How much does the Kimi K3 API cost?

$1.2 / M input · $3.6 / M output. Every call is metered exactly and shown before you run it.

How do I get a Kimi K3 API key?

Create a CompanyFabric account, and one key unlocks Kimi K3 and every other model in the library. Free starter credits are included — no subscription, no card required to try it.

Why use Kimi K3 on CompanyFabric instead of going direct?

One key, one prepaid balance, and one rate-limit envelope across the whole library, at pricing at parity with or below the direct API. Model switching is a one-line change, and BYOK routing is 0% fee.

Is the API OpenAI-compatible?

Yes — point any OpenAI SDK at api.companyfabric.com/v1 and set model to "moonshotai/kimi-k3".

Can I use the output commercially?

Commercial output use permitted per Moonshot terms.

How does billing work?

Prepaid credits via card, or BYOK with your own provider keys at 0% platform fee. No subscription required; balances never expire.

Provider

About Moonshot AI

Moonshot AI publishes the kimi family. License: Commercial output use permitted per Moonshot terms.

Explore

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Browse all models A–Z →

One key. Every model. Exact prices.

Run Kimi K3 with free starter credits. Free starter credits included — no subscription required.

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