JSON mode

Users have the option to set response_format to {"type": "json_object"} to enable JSON mode. Currently, JSON mode is available for all of our models through API.

python

import os
from mistralai import Mistral

api_key = os.environ["MISTRAL_API_KEY"]
model = "mistral-large-latest"

client = Mistral(api_key=api_key)
messages = [
    {
        "role": "user",
        "content": "What is the best French meal? Return the name and the ingredients in short JSON object.",
    }
]
chat_response = client.chat.complete(
      model = model,
      messages = messages,
      response_format = {
          "type": "json_object",
      }
)

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

Example output:

{"name": "Coq au Vin", "ingredients": ["chicken", "red wine", "bacon", "mushrooms", "onions", "garlic", "chicken broth", "thyme", "bay leaf", "flour", "butter", "olive oil", "salt", "pepper"]}

typescript

import { Mistral } from "mistralai";

const apiKey = process.env.MISTRAL_API_KEY;

const mistral = new Mistral({apiKey: apiKey});

const chatResponse = await mistral.chat.complete({
    model: "mistral-large-latest",
    messages: [{role: 'user', content: 'What is the best French meal? Return the name and the ingredients in JSON format.'}],
    response_format: {type: 'json_object'},
    }
);

console.log('JSON:', chatResponse.choices[0].message.content)

curl

curl --location "https://api.mistral.ai/v1/chat/completions" \
     --header 'Content-Type: application/json' \
     --header 'Accept: application/json' \
     --header "Authorization: Bearer $MISTRAL_API_KEY" \
     --data '{
    "model": "mistral-large-latest",
    "messages": [
     {
        "role": "user",
        "content": "What is the best French cheese? Return the product and produce location in JSON format"
      }
    ],
    "response_format": {"type": "json_object"}
  }'