They don’t call this open source anywhere, do they? As far as I can see, they only say it’s open weights and that it’s available under their Mistral AI Non-Production License for research and testing. That doesn’t scream “open source” to me.
If you're talking about exclusively personally use, sure. If you're talking about a business setting in a jurisdiction that Mistral can sue in, not so much.
Being able to use it in a business setting is a pretty darn important part of what Open Source has always meant (it's why it exists as a term at all).
I'm reminded of the Japanese concept called Sosumi :)
> Being able to use it in a business setting is a pretty darn important part of what Open Source has always meant (it's why it exists as a term at all).
I'm quite familiar with the history of that term, but neither I nor Mistral used it. None of their models have been open source; they have been open weight. You can argue that they are actually "weight available" given the terms they write next to the download link, but since there has been no ruling on whether weights themselves are covered by copyright (and I think that would be terribly bogus if they are), I simply choose not to care what they write in their "terms of use".
That's typically called freeware, though.