Does Mistral Small 4 support zero data retention?

Not self-serve on Pay-as-you-go. Zero data retention for Mistral Small 4 is available on request via Opper Enterprise — contact hello@opper.ai.

Where is Mistral Small 4 hosted?

Mistral Small 4 runs on EU hosting routes through the Opper gateway, with contractually enforced residency on supported providers.

Is Mistral Small 4 trained on prompts and outputs?

No. Every hosting route for Mistral Small 4 is configured so customer prompts and outputs are not used to train models by default.

Is a GDPR DPA available for Mistral Small 4?

Yes. A GDPR Data Processing Agreement is available on at least one route serving Mistral Small 4. Contact hello@opper.ai to receive it.

Mistral Small 4

by Mistral

Mistral Small 4, released March 16 2026, is a Mixture-of-Experts model that consolidates the capabilities of Magistral (reasoning), Devstral (coding), and Mistral Small (instruct) into one versatile system. It has roughly 119B total parameters with about 6B active per token, so it stays efficient at inference while eliminating the need to choose between a fast chat model, a reasoning engine, and a multimodal assistant. With a 256K token context window and Apache 2.0 licensing, Small 4 accepts both text and image inputs for general chat, agentic tasks, and complex reasoning. A reasoning effort setting lets you trade response speed against depth. With reasoning enabled, Small 4 matches or surpasses GPT-OSS 120B on several reasoning benchmarks while producing significantly shorter outputs. The model is available across common inference stacks including NVIDIA NIM, vLLM, SGLang, llama.cpp, and Hugging Face Transformers, supporting both cloud and on-premise deployment. Small 4 is built for agentic AI, reasoning workflows, and code-intensive applications where a single adaptable model reduces operational complexity.

Open in playground Try in chat Compare

Key info

Input

Output

Features

Context window

256K

Max output

Input price

$0.15 /1M

Output price

$0.60 /1M

EU residency available
Zero data retention via Enterprise
No training by default
GDPR DPA available

Available routes

Mistral Small 4 runs on 1 route through the Opper gateway. Compare residency, ZDR, and training posture at a glance — full data-handling detail per route below.

Provider	Region	Zero data retention	Training	Input	Output
Mistral	EU	Enterprise	No	$0.15	$0.60

Training posture across routes: No training on prompts by default.

Data handling per route

Each route hosting Mistral Small 4 has its own privacy posture, residency, and GDPR terms. Postures are maintained by Opper with a last-verification timestamp.

Mistral — France🇫🇷

Zero data retention is available via Opper Enterprise contract. No training on customer data. EU; DPA available.

Zero data retention: Available via Opper Enterprise contract.
Training: No training on customer data.
Logging: Abuse monitoring (30-day retention)
Third-party access: Provider may share with subprocessors / partners
GDPR DPA: DPA available
Transfer mechanism: Not applicable — data stays in EU

Get started

Call Mistral Small 4 through the Opper gateway with one API key. Let your coding agent set it up, or call it directly — Opper is drop-in compatible with the OpenAI, Anthropic, and Google AI SDKs.

Set it up with your agent

Copy this and paste it into your coding agent — Claude Code, Cursor, Codex, and more — 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-small-2603",
10  messages: [{ role: "user", content: "Hello" }],
11});
12console.log(completion.choices[0].message.content);