Kimi K2 API

Kimi K2 is a powerful open-source language model with a 128K-token context window, ideal for coding and agentic reasoning, utilizing CometAPI.

AnnaAI model and API research team

Updated Sep 3, 2026 3 min read

Use this pattern

Make the first API call.

from openai import OpenAI

client = OpenAI(
    api_key="YOUR_COMETAPI_KEY",
    base_url="https://api.cometapi.com/v1",
)

response = client.chat.completions.create(
    model="gpt-5-mini",
    messages=[{"role": "user", "content": "Build this workflow."}],
)

print(response.choices[0].message.content)

Kimi K2 API is an open‑source, trillion‑parameter Mixture‑of‑Experts language model with a 256K‑token context window, optimized for high‑performance coding, agentic reasoning, and efficient inference.

Kimi K2-0905 is the latest AI model released by Darkside of the Moon Technology Co., Ltd. It boasts powerful programming assistance capabilities, excelling in code generation and front-end development. Its context length is extended to 256KB, supporting complex tasks. The high-speed API output speed of the model reaches 60–100 tokens/second, ensuring fast response times.

The model is compatible with the Anthropic API, supports the WebSearch Tool, and offers an enhanced Claude Code experience. It also provides automatic context caching to reduce user costs. Users can now experience it through CometAPI (kimi-k2-250905).

Basic Information & Features

Kimi K2

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Published on Sep 4, 2025

Last updated Sep 3, 2026

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Reviewed for clarity, source attribution and current API terminology.

pythonimport openai

openai.api_key = "YOUR_CometAPI_API_KEY"
openai.api_base = "https://api.cometapi.com/v1/chat/completions"

messages = [
    {"role": "system",  "content": "You are a helpful assistant."},
    {"role": "user",    "content": "Summarize Kimi K2's main features."}
]

response = openai.ChatCompletion.create(
    model="kimi-k2-250905",
    messages=messages,
    temperature=0.7,
    max_tokens=500
)

print(response.choices.message)

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Kimi K2 API

Make the first API call.

Basic Information & Features

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Technical Architecture

Benchmark Performance

How to call Kimi K2 API from CometAPI

`Kimi K2` API Pricing in CometAPI，20% off the official price:

Required Steps

Use Method

API Integration & Examples

Read More

Kimi K2 API

Make the first API call.

Basic Information & Features

Connect this article to the next decision.

Technical Architecture

Benchmark Performance

How to call Kimi K2 API from CometAPI

Kimi K2 API Pricing in CometAPI，20% off the official price:

Required Steps

Use Method

API Integration & Examples

How to call Kimi K2 API from CometAPI

`Kimi K2` API Pricing in CometAPI，20% off the official price: