First month for free!

Get started

Mistral AI API

Open-Source LLM API

Powered by Zephyr and Mixtral AI, delivering ChatGPT level performance.

75% cheaper than GPT-3.5 - From $0.50 per 1 million tokens.

Our OpenAI-compatible chat API is trained to be a helpful assistant. We are supporting two state of the art open-source AI models (Zephyr and Mixtral AI). Both can be utilized for a wide range of applications. They excel in tasks such as commonsense reasoning, world knowledge, reading comprehension, code-related tasks, and more. Test it for yourself in our AI API playground.

API Usage

Our OpenAI-compatible API takes a list of messages as input and provides an AI-generated (assistant) message as output. If you haven't already, you will need to create an API key to authenticate your requests.

// npm install --save openai or yarn add openai
import OpenAI from "openai";

const openai = new OpenAI({
  apiKey: "YOUR_API_KEY",
  baseURL: "",

const completion = await{
  messages: [
    { role: "system", content: "You are a helpful assistant." },
    { role: "user", content: "How many days are in a year?" },
  model: "zephyr-chat",


API Response

  "id": "cmpl-8a9ba025b8a744e881636351a26e4642",
  "object": "chat.completion",
  "created": 1697721484,
  "model": "zephyr-chat",
  "choices": [
          "index": 0,
          "message": {
              "role": "assistant",
              "content": "There are typically 365 days in a year. However, in a leap year, which occurs every four years, there are 366 days. Leap years are used to account for the extra fraction of a day that is not included in a regular year."
          "finish_reason": "stop"
  "usage": {
      "prompt_tokens": 30,
      "total_tokens": 90,
      "completion_tokens": 60

You can obtain only the generated assistant message with the following code:


API Parameters

The API POST takes the following parameters:


Start Your Free Trial