Mistral AI history, from its founding to the Large 4 preview
By Christophe Paka · Facts checked on 24 October 2026
Mistral AI is a young French company that makes AI models and a chat app. This page gives its short Mistral AI history on one timeline, so you can tell how old a guide is.
You follow a Mistral tutorial. It says to open Le Chat, but you cannot find it. It names a model, and the API says that model is not served. The guide is not wrong. It is old, and it can cost you an afternoon.
The timeline below marks six moments in date order: when Mistral began, how it raised money, when the app changed its name, and when its largest model opened.
How to read this figure
Read the dots left to right. Each dot is one moment, in date order. The dots are evenly spaced, not to scale, so the gap between two dots tells you nothing about time. Read the date above each dot, then the event below it.
Blue dots: the founding and two rounds. Mistral was founded in Paris in April 2023. It raised a Series B round in June 2024. In a round, investors buy shares in the company, and rounds get letters in order, A, B, C, as a firm grows. A Series C in September 2025 valued it at EUR 11.7 billion.
The green dot: Le Chat becomes Vibe. In May 2026 the app Le Chat took the name Vibe. It is the same app. That is why guides and forum posts use both names, and why many readers still say Le Chat or Vibe Chat.
Purple dots: money, then a new model. In September 2026 came a EUR 3 billion Series D, led by Samsung. In October 2026 Mistral Large 4 opened as a public preview: an early release anyone can try, with fewer guarantees than a final version.
One thing the line does not mark. Models also retire, and no dot shows that. In the summer of 2026, Studio, Mistral's API platform for developers, stopped serving older models such as Devstral 2 and Magistral. If you only use the app, skip this. If you follow a tutorial, check each model name first. The post on what Mistral AI is explains Studio and Vibe.
Key takeaways
- Treat Le Chat and Vibe as one app when you read guides, reviews and forum posts.
- Check every model name from an old tutorial against the models overview before you copy it.
- Try a preview model, but do not build a product that depends on a test release.
Worked example: date an old tutorial before you follow it
You find a guide that says to open Le Chat and call Devstral 2. Use the timeline to date it.
- The guide says Le Chat, so it was written before the app became Vibe.
- It names Devstral 2, one of the models Studio stopped serving after the rename.
- It never mentions Large 4, so it may also predate the preview.
- Open the models overview and look up each model name the guide uses.
Result: The guide is older than the rename. Keep its ideas, swap each retired model for one the models overview lists, and look for the app under the name Vibe.
Questions readers ask
When was Mistral AI founded?
Mistral AI was founded in Paris in April 2023. Its founders came from Google DeepMind and Meta: Arthur Mensch, the CEO, Guillaume Lample, the Chief Science Officer, and Timothée Lacroix, the CTO.
Is Le Chat still available?
Yes, under a new name. Le Chat became Vibe in May 2026, and it is the same app. Readers still say Le Chat or Vibe Chat, so search for both names when you look for help.
Who funds Mistral AI?
Investors who buy shares in funding rounds. The timeline marks three of them: Series B in June 2024, Series C in September 2025, which valued Mistral at EUR 11.7 billion, and Series D in September 2026. That last one raised EUR 3 billion and was led by Samsung.
Where does Mistral keep my data?
Mistral is a French company, incorporated in Paris, so EU law governs it. That alone sets no data switch. On Studio, its API, you pick the EU or US region yourself. For chats in the Vibe app, the book's sources name no region, so ask Mistral in writing. See how Mistral hands data to other companies.
Sources: Company page (Mistral AI); Series D announcement (Mistral AI); Vibe gets to work (Mistral AI).
This figure is from Mistral Made Crystal Clear, chapter 1.
The chapter builds the idea step by step, with recipes you can follow, a Try it to check yourself, and every source.
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