Proton claims their “Lumo” to be a fully open source AI chatbot.

Luckily, there is @dingemansemark ’s European Open Source AI Index that makes clear that Lumo is in fact “the least open 'open' model” that they have seen so far.

https://osai-index.eu/news/lumo-proton-least-open

Lumo: the least open 'open' AI assistant | European Open Source AI Index

Proton sets a new record in open-washing

European Open Source AI Index