Lumo AI

by Proton

About the model:

Lumo by Proton, advertised as 'open source' and 'based upon open-source language models'.

Model type:

Text

Model performance class:

Full

Link to the model:

https://lumo.proton.me/about

Base models:

Undisclosed

End model:

Undisclosed

End model license:

Undisclosed

About the organisation:

Proton, a privacy-aware ISP based in Switzerland.

Link to the organisation:

https://proton.me/blog/lumo-ai

Model release date:

July 2025

Availability

Base Model Data

Training data not disclosed.

End User Model Data

Source code not disclosed. Link on Proton website points to code for web app, not code for LLM.

Base Model Weights

Based model weights not shared or disclosed. Some web app code contains a trace that points to Mistral 7B.

End User Model Weights

Post-trained or instruction-tuned model weights not shared nor disclosed.

Training Code

No source code made available for training or architecture of the model.

Documentation

Code Documentation

No source code, so no documentation.

Hardware Architecture

No details about underlying model provided.

Preprint

No scientific documentation.

Paper

No peer-reviewed scientific documentation.

Modelcard

No model card available. Evaluations, risks, biases, guardrails and safety measures unclear.

Datasheet

No data sheet available. Training data undisclosed.

Access

Licenses

License unclear.

Last updated 13 March 2026

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