Mistral Medium 3.1
Mistral Medium 3.1 (Mistral, 2025) is an image-generation model. Mistral Medium 3.1 is an updated version of Mistral Medium 3, which is a high-performance enterprise-grade language model designed to deliver frontier-level capabilities at significantly reduced operational cost. It balances...
by Mistral · 131K token context window
Best for
- image generation from text
- creative design and ideation
Ways to use Mistral Medium 3.1 in osFoundry
Connect with your own key (BYOK)
Open the key dialog and paste your Mistral API key. osFoundry discovers Mistral Medium 3.1 automatically — assign it to a Maestro role (router, direct, orchestrator, or fallback) in the Pipeline tab and it is live in every chat. Your key, your provider account — no token markup.
Use it in a Room App
Room Apps declare AI features in their manifest, then call them with invokeAI:
import { invokeAI } from '@osfoundry/app-sdk'
// 'summarize' is an AI feature declared in your app manifest.
const result = await invokeAI('summarize', userText)
Call it from your own apps
Once a model is wired into your workspace you can host it as an API and reach it from your own services, scripts, or CI — outside osFoundry.
Mistral Medium 3.1 vs similar models
| Model | Org | Params | Context | Input price | Self-host |
|---|
| Mistral Medium 3.1 | Mistral | — | 131K | $ 0.400 /1M | API only |
| Grok 4 Fast | xAI | — | 2000K | $ 0.200 /1M | API only |
| ERNIE 4.5 VL 28B A3B | Baidu | — | 30K | $ 0.140 /1M | API only |
| GPT-5 Codex | OpenAI | — | 400K | $ 1.25 /1M | API only |
Licence
Hosted — usage subject to provider terms — Hosted-only model — usage governed by the provider's API terms. Bring your own provider key.
No weights distributed; usage subject to provider terms.
Frequently asked about Mistral Medium 3.1
How much does Mistral Medium 3.1 cost?
Mistral Medium 3.1 is metered at $ 0.400 /1M for input, and $ 2.00 /1M for output. Bring your own Mistral API key — osFoundry passes through provider pricing without markup.
Can I use Mistral Medium 3.1 commercially?
Commercial use is allowed with conditions. Hosted-only model — usage governed by the provider's API terms. Bring your own provider key. No weights distributed; usage subject to provider terms.
What is the context window of Mistral Medium 3.1?
Mistral Medium 3.1 supports a 131K token context window.
Can I run Mistral Medium 3.1 locally?
No — Mistral Medium 3.1 is hosted only and accessed via the Mistral API.
What is Mistral Medium 3.1 best at?
Mistral Medium 3.1 is well-suited to image generation from text, creative design and ideation.
How do I use Mistral Medium 3.1 in osFoundry?
Paste your Mistral API key in the key dialog (or deploy the open weights for self-hostable models), assign Mistral Medium 3.1 to a Maestro role in the Pipeline tab, then use it in chat, Room Apps via invokeAI, or your own apps.
Published by Mistral on August 13, 2025. Source: https://openrouter.ai/mistralai/mistral-medium-3.1