Mistral Medium 3.1 API

About Mistral Medium 3.1

Enterprise-grade model with strong reasoning, coding, and STEM performance, supporting hybrid, on-prem, and in-VPC deployments.

Also known as Mistral Medium, Mistral-Medium-3.1

Mistral Medium 3.1 specs

Model ID

mistral-medium-3-1

Provider

Mistral AI

Category

Text Generation

Context window

131K tokens

Max output

40,000 tokens

Input

text, image

Output

text

Endpoints

POST /v1/chat/completions
POST /v1/responses
POST /v1/messages

Mistral Medium 3.1 API pricing

Live pay-as-you-go rates from the EmpirioLabs catalog. You are billed only for what you use, with no monthly minimum.

How to call the Mistral Medium 3.1 API

Mistral Medium 3.1 serves the OpenAI-compatible Chat Completions API. Point any OpenAI SDK at https://api.empiriolabs.ai/v1 with your EmpirioLabs API key and use the model id mistral-medium-3-1. Get an API key from the EmpirioLabs dashboard.

curl https://api.empiriolabs.ai/v1/chat/completions \
  -H "Authorization: Bearer $EMPIRIOLABS_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "mistral-medium-3-1",
    "messages": [
      {"role": "user", "content": "Write a haiku about the ocean."}
    ]
  }'

from openai import OpenAI

client = OpenAI(
    base_url="https://api.empiriolabs.ai/v1",
    api_key="YOUR_EMPIRIOLABS_API_KEY",
)

response = client.chat.completions.create(
    model="mistral-medium-3-1",
    messages=[{"role": "user", "content": "Write a haiku about the ocean."}],
)
print(response.choices[0].message.content)

Mistral Medium 3.1 API parameters

Request parameters supported by the Mistral Medium 3.1 API on EmpirioLabs. Defaults apply when a field is omitted.

Mistral Medium 3.1 API: common questions

How much does the Mistral Medium 3.1 API cost?

On EmpirioLabs, Mistral Medium 3.1 is billed pay as you go: Input $0.52 per 1M prompt tokens; Output $2.60 per 1M generated tokens; Web Search (Linkup) $0.013 per call when invoked. The live rate card on this page always matches what the API charges.

What is the context window of Mistral Medium 3.1?

Mistral Medium 3.1 supports a 131K-token context window with up to 40,000 output tokens per response.

Is the Mistral Medium 3.1 API OpenAI-compatible?

Yes. Mistral Medium 3.1 serves the OpenAI-compatible Chat Completions API, so existing OpenAI SDKs work by pointing base_url at https://api.empiriolabs.ai/v1 and setting the model id to mistral-medium-3-1.

Can I try Mistral Medium 3.1 in the browser before integrating?

Yes. The EmpirioLabs playground runs Mistral Medium 3.1 in the browser with the same parameters the API exposes, so you can test prompts before writing code.

How do I get a Mistral Medium 3.1 API key?

Create an EmpirioLabs account, then generate a key under API Keys in the dashboard. Billing is pay-as-you-go credits, so you only pay for the requests you make.