Proton Lumo 2.0: Privacy Design and What Changed

Lumo AI 2.0 from Proton: what the update is

Lumo is Proton's privacy-focused AI assistant, and Lumo 2.0 is a major update to it. Proton announced it on June 30, 2026.

Proton also says more than 10 million people have started using Lumo. The announcement gives these details:

Lumo 2.0 privacy: Swiss law and zero-access encryption

Lumo's privacy claim rests on three points, and all three come from Proton. Zero-access encryption means Proton, as the provider, cannot read what Lumo stores.

• Swiss privacy laws protect the service.
• Zero-access encryption covers what Lumo stores.
• It runs on Proton's fully European infrastructure.

These are Proton's statements about its own service. For a wider look at AI built to stay inside one jurisdiction, see Apertus AI: The Swiss Open LLM for Sovereign AI.

Proton Lumo AI score: 15 to 51 for Lumo 2.0

Proton reports 15 for Lumo 1.4, 34 for Lumo 2.0 Lite and 51 for Lumo 2.0 Max on the Artificial Analysis Intelligence Index. According to Proton, the index is run independently and pools 10 tests that cover agent tasks, coding, science reasoning and general knowledge.

Proton states that Lite scores 127% higher than Lumo 1.4 and Max scores 240% higher. Within Lumo 2.0, Max is about 1.5 times Lite (51 divided by 34).

Intelligence Index scores reported by Proton on June 30, 2026

These are Proton's reported numbers for its own line-up on one date. The chart shows the gain between Lumo versions and does not rank Lumo against other vendors' models.

02040

51Lumo 2.0 Max

34Lumo 2.0 Lite

15Lumo 1.4 (old)

Lumo AI 2.0 features: Fast, Thinking and images

Lumo 2.0 adds two reasoning modes. Fast prioritizes speed, and Thinking is built for harder, multi-step reasoning.

Lumo 2.0 can also read and produce images. Its context window is twice as large, so one conversation can hold more text.

Lumo AI vs ChatGPT: no official score comparison

Proton's performance section compares Lumo 2.0 with Lumo 1.4 only. It gives no score for ChatGPT or any other vendor's model.

The 15 to 51 gain shows how far Lumo moved, not where it ranks among assistants such as ChatGPT. If you are choosing between them, this announcement cannot settle it.

For a broader look at another assistant, see What Is Claude AI? Free Plan, Models, vs ChatGPT.

Proton Lumo 2.0 privacy: which work it suits

The privacy design fits material you do not want the provider to read. Proton says zero-access encryption means it cannot read the stored contents, which is the condition that kind of work needs. To keep everything on your own hardware instead, Local LLM Coding Now Hits 75% of Cloud AI covers that route.