Text · Moonshot AI

Kimi API

Moonshot AI Kimi API access via RunAPI — 1T-parameter MoE with 256K context, 58.6% SWE-bench Pro.

Operational · 2 variants · from $0.020
runapi.ai
# Base URL
https://runapi.ai

# Endpoints
POST /v1/chat/completions
curl https://runapi.ai/v1/chat/completions \
  -H "Authorization: Bearer $RUNAPI_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "model": "kimi-k2.6",
  "messages": [
    {
      "role": "user",
      "content": "Plan and implement a small CLI tool: scaffold the project, write the commands, add tests, and run them until they pass."
    }
  ]
}'
from openai import OpenAI

client = OpenAI(
    base_url="https://runapi.ai/v1",
    api_key="your-runapi-key"
)

response = client.chat.completions.create(
    model="kimi-k2.6",
    messages=[{"role": "user", "content": "Plan and implement a small CLI tool: scaffold the project, write the commands, add tests, and run them until they pass."}]
)
import OpenAI from "openai";

const client = new OpenAI({
  baseURL: "https://runapi.ai/v1",
  apiKey: "your-runapi-key"
});

const response = await client.chat.completions.create({
  model: "kimi-k2.6",
  messages: [{ role: "user", content: "Plan and implement a small CLI tool: scaffold the project, write the commands, add tests, and run them until they pass." }]
});
https://runapi.ai /v1/chat/completions
OVERVIEW

Kimi is Moonshot AI's K2 family of Mixture-of-Experts language models — 1 trillion total parameters with 32B active per token, 384 experts per layer. kimi-k2.5 (256K context) added native multimodal input and strong coding benchmarks. kimi-k2.6 refines post-training for long-horizon agent stability, reaching 58.6% on SWE-bench Pro and scaling Agent Swarm orchestration to 300 sub-agents. Both are available through RunAPI with one key and per-token billing.

  • Multiple variants for different speed, quality, and cost tiers
  • Model skill includes docs, schemas, pricing, and setup notes
  • Works with Claude Code, Codex, Gemini CLI, Cursor, and VS Code
  • Single API key and unified billing across all variants
  • Async task management with polling and webhook callbacks
  • Failed generations are not charged
VARIANTS

Compare all API variants

Variant Billing From
kimi-k2.5 1K tokens $0.020 View →
kimi-k2.6 1K tokens $0.020 View →
API

Kimi API endpoints

Use the OpenAI or Anthropic SDK with your RunAPI key. No extra SDK required.

Endpoint Protocol
/v1/chat/completions OpenAI compatible
HOW IT WORKS

From model skill to first result in four steps

01

Choose a model

Browse the model catalog and pick the model and variant that match your output type, quality bar, and latency target. Each variant page shows its model ID, pricing, and parameter constraints so you can compare before committing.

02

Configure

Set your RunAPI API key as an environment variable and install the model skill in your coding workspace. The skill loads docs, typed schemas, pricing notes, and setup steps so your agent has the right context from the start.

03

Call

Use the skill instructions to add the model feature inside your application. Send a POST request with your prompt, model ID, and parameters. RunAPI routes the request, manages the async lifecycle, and returns structured JSON.

04

Receive

Poll by task ID for completion, stream results end-to-end when supported, or configure a webhook callback URL to receive results automatically. The CLI provides a built-in wait command, and the SDKs offer both polling and callback patterns.

CONTEXT

What is the Kimi API?

Kimi K2 models from Moonshot AI are 1T-parameter MoE LLMs with 256K context, optimized for autonomous coding and multi-agent orchestration. kimi-k2.6 scores 58.6% on SWE-bench Pro. Through RunAPI they share a single API key with pay-as-you-go token billing, callable from the OpenAI Chat Completions, OpenAI Responses, and Anthropic Messages surfaces.

Provider
Moonshot AI
Modality
Text
WHY RUNAPI

Why route the Kimi API through RunAPI

One auth, every provider

A single RunAPI API key unlocks the whole model catalog across all providers. No separate accounts to create, no API keys to rotate per integration, and no credential management overhead. Add a new model to your app by changing one parameter.

Unified pricing & billing

Per-call pricing in USD, billed monthly into a single invoice. No subscription tiers, no minimum spend, and failed generations are never charged. The pricing page and check_pricing API show exact costs before you commit to a model.

Schema-first SDK

Typed schemas, parameter constraints, and setup notes are packaged in the model skill so your implementation starts from the right contract. The skill loads into Claude Code, Codex, Gemini CLI, Cursor, and VS Code — your agent knows the correct request shape before you write a line of code.

FAQ

Common questions

Which variant should I start with?

Pick the cheapest variant that meets your quality bar. Most teams start on the fast variant and graduate to pro for production.

Is there a free tier?

New accounts get free first calls on every model. After that, pay per call.

Do you stream results?

Where streaming is available, RunAPI streams end-to-end.

How are failures billed?

Failed generations are not charged.

Are outputs cached?

Generated outputs are stored and retrievable by task ID. Inputs are not cached.

Can I use commercially?

Yes — commercial use is included for every variant unless a model license explicitly restricts it, which is called out on the variant page.

What about rate limits?

Per-key rate limits scale with usage tier. See pricing page for current limits.

Where can I report issues?

Open an issue on the public GitHub repo or email support.

START NOW

Start building with the Kimi API.