How do I use Kimi K3 through YepAPI?

Sign up for a free API key, then send requests to the /v1/ai/chat endpoint.

Moonshot AIText Generation/v1/ai/chatReasoning

Kimi K3

Access Kimi K3 through one API key. Moonshot AI Kimi K3 Open-Weight Reasoning.

Kimi K3 is a 2.8T-parameter open-weight multimodal reasoning model from Moonshot AI, built for complex coding, knowledge work and long-horizon agentic workflows. It suits long agent runs, large refactors and research tasks where an open-weight model with frontier-scale reasoning is preferred.

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2,400+

Developers

1.2M+

API calls served

100+

Endpoints

$0.01

Per call

Yep, that's it.

Try it live

Send a message and see Kimi K3 respond in real time.

POST/v1/ai/chatmoonshotai/kimi-k3

Message *

Max Tokens

Maximum tokens in the response.

Stream

Real-time tokens

Hit "Send Request" to see the response

Context Window

1.0M tokens

Max Output

944K tokens

Input Price

$4.43 / 1M tokens

Output Price

$22.15 / 1M tokens

Strengths

✓

Open-weight at frontier scale

2.8T parameters with open weights, for teams that prefer models they could also self-host.

✓

Long-horizon agents

Built for multi-step agentic workflows that run for many tool calls.

✓

1M token context

Up to 1,048,576 input tokens per request.

✓

Multimodal input

Takes text, images and video alongside code and documents.

Quick start

Copy this snippet and start making calls with Kimi K3.

const res = await fetch('https://api.yepapi.com/v1/ai/chat', {
  method: 'POST',
  headers: {
    'x-api-key': 'YOUR_API_KEY',
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({
    "model": "moonshotai/kimi-k3",
    "messages": [
      {
        "role": "user",
        "content": "Explain API gateways in 2 sentences."
      }
    ],
    "maxTokens": 256
  }),
});
const { data } = await res.json();
console.log(data.message.content);

Why use Kimi K3 through YepAPI?

✓One API key for all models — no separate accounts

✓OpenAI SDK compatible — just change the base URL

✓No monthly minimums — pay per token

✓Switch models with one line of code

✓Full provider passthrough — citations, search results, and all extras included

✓Streaming and non-streaming support on every model

✓Works with Cursor, Claude, LangChain, and any LLM tool

✓Unified billing across all providers

Kimi K3 API — pricing, context window & access

Kimi K3 is a 2.8T-parameter open-weight multimodal reasoning model from Moonshot AI, built for complex coding, knowledge work and long-horizon agentic workflows. It pairs a 1,048,576-token context window with up to 943,718 output tokens per response, at $4.43 per 1M input and $22.15 per 1M output tokens through YepAPI.

Through YepAPI you call Kimi K3 on an OpenAI-compatible endpoint with a single key — the same key that reaches GPT-6, Claude, Gemini, Grok and the SEO, SERP and scraping APIs. Input: text, images, video.

What is Kimi K3?

Kimi K3 is a 2.8T-parameter open-weight multimodal reasoning model from Moonshot AI, built for complex coding, knowledge work and long-horizon agentic workflows. It succeeds Kimi K2.5 and K2.7 Code, adds image and video input, and is one of the largest open-weight models available. It accepts text, images, video as input, handles up to 1,048,576 tokens of context and returns up to 943,718 output tokens per call.

Build with Kimi K3 via YepAPI

YepAPI serves Kimi K3 on the OpenAI-compatible /v1/ai/chat endpoint. Point your base URL at YepAPI, add your key, and set the model string to kimi-k3 (or the full moonshotai/kimi-k3). Function calling, structured outputs and reasoning settings pass straight through, and switching to any other model on the platform is a one-string change per request.

Kimi K3 API pricing — $4.43 / 1M input, $22.15 / 1M output

Kimi K3 costs $4.43 per 1M input tokens and $22.15 per 1M output tokens through YepAPI, pay per token with no minimums. Failed calls are never charged, and every request is itemised in your dashboard API Logs.

Kimi K3 use cases

It suits long agent runs, large refactors and research tasks where an open-weight model with frontier-scale reasoning is preferred.

Try Kimi K3 free

Every new YepAPI account includes $5 in free credit with no card required — enough to test Kimi K3 on your own prompts before committing to paid usage. Create an account, copy your key, and call kimi-k3 right away.

Start generating in 30 seconds

$5 free credit on signup. No credit card required. Pay per call.

Get API Key

What developers say

“Switched from SerpAPI and cut our SERP costs by 80%. Same data quality, way simpler billing.”
Marcus T.
SEO Platform Founder

“One API key for AI models, SERP data, and web scraping. Saved us from managing 4 separate providers.”
Priya S.
Full-Stack Developer

“The $5 free credit let us prototype our entire rank tracking feature before committing. No other API does that.”
Jake R.
Indie Hacker

Frequently asked questions

Input tokens cost $4.43 per 1M tokens and output tokens cost $22.15 per 1M tokens through YepAPI. No monthly minimums — you only pay for what you use.

Kimi K3 supports a 1.0M token context window with up to 944K output tokens per request.