Does Mistral Medium 3.1 support zero data retention?

Yes. Mistral Medium 3.1 is available with zero data retention on Mistral through the Opper gateway.

Where is Mistral Medium 3.1 hosted?

Mistral Medium 3.1 runs on EU hosting routes through the Opper gateway, with contractually enforced residency on supported providers.

Is Mistral Medium 3.1 trained on prompts and outputs?

No. Every hosting route for Mistral Medium 3.1 is configured so customer prompts and outputs are not used to train models by default.

Is a GDPR DPA available for Mistral Medium 3.1?

Yes. A GDPR Data Processing Agreement is available on at least one route serving Mistral Medium 3.1. Contact hello@opper.ai to receive it.

Mistral Medium 3.1

by Mistral

Mistral Medium 3.1 is Mistral's frontier-class multimodal model, released August 2025 to lead professional use cases including coding, document understanding, and agentic workflows. It supports text, vision, function calling, and structured outputs across a 128k token context window. The model balances performance with efficiency, making it suitable for production systems that reason over documents and mixed-modality input. Support for agent orchestration and structured outputs makes it a versatile choice for full-stack AI applications. The model is scheduled for deprecation on May 22, 2026, with Mistral Medium 3.5 as its successor.

Call Mistral Medium 3.1 on Opper with the OpenAI SDK. Sign up without a credit card. Get started

Open in playground Try in chat Compare

Key info

Input

Output

Features

Context window

128K

Max output

Input price

$0.40 /1M

Output price

$2.00 /1M

EU residency available
Zero data retention on pay-as-you-go
No training by default
GDPR DPA available

Available routes

Mistral Medium 3.1 runs on 1 route through the Opper gateway. Compare residency, zero data retention and training posture at a glance, with full data-handling detail per route below.

Provider	Region	Zero data retention	Training	Input	Output	Cache read
Mistral	EU		No	$0.40	$2.00	Input price

Uptime and availability

Mistral Medium 3.1 runs on a single route through the Opper gateway today, so its availability is that provider's availability.

100%route uptime, last 30 days

Single route, no failover target within this model.

Name a second model in the same request and the gateway tries it on retriable errors, so a busy hour never has to reach your users. Set up a fallback chain.

Measured over the last 30 days from each provider's official status feed via StatusGator. Refreshed hourly. See uptime for every provider Opper monitors.

Data handling per route

Each route hosting Mistral Medium 3.1 has its own privacy posture, residency, and GDPR terms. Postures are maintained by Opper with a last-verification timestamp.

Mistral — France🇫🇷

Zero data retention: nothing is logged, held for abuse monitoring or used for training. No training on customer data. EU; DPA available.

Zero data retention: Yes. Nothing is logged, held for abuse monitoring or used for training.
Training: No training on customer data.
Logging: None
Abuse monitoring: No classifier
Caching: Content cached for replay
GDPR DPA: DPA available
Transfer mechanism: Not applicable — data stays in EU

Get started

Call Mistral Medium 3.1 through the Opper gateway with one API key. Opper is drop-in compatible with the OpenAI, Anthropic and Google AI SDKs.

Mistral Medium 3.1 is a premium model on Opper. Sign up needs no credit card: you get an API key straight away and the free models work in the playground and the API. Add a card to use premium models, pay-as-you-go with no minimum.

Set it up with your agent

Copy this and paste it into a coding agent like Claude Code, Cursor or Codex and it'll wire up Opper for you.

Or call it directly

1import OpenAI from "openai";
2
3const client = new OpenAI({
4  apiKey: process.env.OPPER_API_KEY,
5  baseURL: "https://api.opper.ai/v3/compat",
6});
7
8const completion = await client.chat.completions.create({
9  model: "mistral/mistral-medium-2508",
10  messages: [{ role: "user", content: "Hello" }],
11});
12console.log(completion.choices[0].message.content);