Mistral AI: Mistral Small 4

Name: Mistral Small 4 API
Brand: Mistral

stable

Mistral Small 4 is available through Everstack's OpenAI-compatible gateway with routing, fallback, retries, and observability.

mistral-small-2603mistral-smallreleased Mar 16, 2026

Provider Quick start

Context

256K

tokens

Max output

256K

tokens

Input

$0.15

per 1M

Output

$0.60

per 1M

Activity

Daily period usage

Aggregated managed Everstack traffic. Buckets below 5 tenants or 100 requests are withheld.

Providers

ProviderContextInput /MOutput /M

Mistral AI

256K$0.15$0.60

Pricing

Item	Price	Unit
Input	$0.15	per 1M tokens
Output	$0.60	per 1M tokens

Performance

Reliability

Compare

Compare usage and performance

Place this model beside up to three other catalog models.

Capabilities

Modalities

Input

Output

Details

Model ID: mistral-small-2603
Family: mistral-small
Status: stable
Knowledge: Jun 1, 2025
Released: Mar 16, 2026

Gateway Config

API: 2024-01-01
Auth: MISTRAL_API_KEY
Discovery: static
Provider type: static

Quick Start

index.ts

import Everstack from "@everstack/node";const client = new Everstack({  apiKey: process.env.EVERSTACK_API_KEY!,  baseUrl: "https://{instance}.{region}.everstack.ai",});const completion = await client.chat.completions.create({  model: "@mistral/mistral-small-2603",  messages: [{ role: "user", content: "Explain vector cache routing." }],});console.log(completion.choices[0]?.message?.content);

Endpoint

Base URL

https://api.mistral.ai/v1

Chat completions

https://api.mistral.ai/v1/chat/completions

Model

mistral-small-2603

Auth env

MISTRAL_API_KEY

Mistral Small 4 FAQ

How much does the Mistral Small 4 API cost?

Through Mistral AI, Mistral Small 4 costs $0.15 per 1M input tokens and $0.60 per 1M output tokens.

What is the context window of Mistral Small 4?

Mistral Small 4 accepts up to 256K tokens of context and returns up to 256K output tokens on Mistral AI.

What can Mistral Small 4 do?

Mistral Small 4 supports chat, function calling, image input and reasoning. It accepts text and image input.

How do I call Mistral Small 4 through Everstack?

Point any OpenAI-compatible SDK at your Everstack gateway and set the model to @mistral/mistral-small-2603. Everstack adds retries, provider fallback, caching, per-tenant budgets and OpenTelemetry traces for every request.