Mistral AI API Not Working?

Standard API (Python + OpenAI SDK)

from openai import OpenAI
import os

# Mistral is fully OpenAI SDK compatible — just change base_url
client = OpenAI(
    api_key=os.environ["MISTRAL_API_KEY"],
    base_url="https://api.mistral.ai/v1",
)

response = client.chat.completions.create(
    model="mistral-small-latest",  # or mistral-large-latest
    messages=[{"role": "user", "content": "Hello!"}],
)
print(response.choices[0].message.content)

Codestral — code completion (different endpoint + key)

from openai import OpenAI
import os

# Codestral: DIFFERENT base_url AND different api_key!
codestral = OpenAI(
    api_key=os.environ["CODESTRAL_API_KEY"],  # NOT MISTRAL_API_KEY
    base_url="https://codestral.mistral.ai/v1",  # NOT api.mistral.ai
)

# Regular chat completions
resp = codestral.chat.completions.create(
    model="codestral-latest",
    messages=[{"role": "user", "content": "Write a Python function to sort a list"}],
)

# FIM (fill-in-middle) — unique to Codestral
import requests
fim_resp = requests.post(
    "https://codestral.mistral.ai/v1/fim/completions",
    headers={"Authorization": f"Bearer {os.environ['CODESTRAL_API_KEY']}"},
    json={
        "model": "codestral-latest",
        "prompt": "def fibonacci(",
        "suffix": "
    return result",
    },
)
print(fim_resp.json()["choices"][0]["message"]["content"])

Tool calling — use "any" not "required"

response = client.chat.completions.create(
    model="mistral-large-latest",
    messages=[{"role": "user", "content": "What's the weather in Paris?"}],
    tools=[{
        "type": "function",
        "function": {
            "name": "get_weather",
            "description": "Get current weather",
            "parameters": {
                "type": "object",
                "properties": {"city": {"type": "string"}},
                "required": ["city"]
            }
        }
    }],
    tool_choice="any",  # Mistral: "any" forces tool use (NOT "required" like OpenAI)
                        # Other values: "auto" (model decides), "none" (disable tools)
)

Pixtral vision (image input)

# Vision: use pixtral-12b-2409 or pixtral-large-latest
response = client.chat.completions.create(
    model="pixtral-12b-2409",
    messages=[{
        "role": "user",
        "content": [
            {"type": "text", "text": "What's in this image?"},
            {
                "type": "image_url",
                "image_url": {
                    "url": "https://example.com/image.jpg"
                    # OR base64: "url": "data:image/jpeg;base64,..."
                }
            }
        ]
    }]
)