Mistral Medium is the middle-sized line of language models from the French company Mistral AI, aimed at businesses that want strong results at a lower price.
In plain words
Mistral sells models in several sizes. Medium sits between the small, cheap ones and the biggest ones. Mistral Medium 3 arrived in May 2025, pitched at companies that want to run it in their own cloud. The newest version, Mistral Medium 3.5, is a single dense model with 128 billion parameters that handles chat, reasoning and coding together, and its weights are published under a modified MIT licence.
A quick example
Imagine a company that wants a coding assistant but must keep its code on its own servers. It could download the open weights of a Mistral Medium model and run it on its own machines instead of sending code to an outside service.
Where you'll meet it
- Mistral's Le Chat assistant and Vibe coding agent.
- Company deployments in a private cloud or on-premises.
Related
Sources
- DocsMedium is the new large., Mistral AI · read 12 Oct 2026
- DocsRemote agents in Vibe. Powered by Mistral Medium 3.5., Mistral AI · read 29 Sept 2026
- DocsMistral Medium 3.5, Mistral Docs · read 29 Sept 2026
Checked by WhatIsAI against the sources above · 12 Oct 2026. Spotted an error? Report it.