Proton released an "AI" (Lumo) that they market as open source. About that... with zero openness features checked it is the least open "open" model ever to arrive in the European OS AI index
Compare Lumo, Deepseek and OLMo: https://osai-index.eu/compare?models=OLMo,deepseek-v3,lumo
Until Proton tells us more about the base LLM and other aspects of this system, it is officially the least open LLM that is marketed as "open source"
Screenshot of Lumo promotion website with claim highlighted: "Opens source code to the public". Checkbox for Lumo is incorrect.
Screenshot of dark-mode OSAI website showing Lumo AI with 14 categories in red, from source code to training data to architecture to model card, data sheets and licensing.