Updated October 21, 2026

Lewis models

Our models support simulated research and conversation. Each system has its own role and evaluation scope.

Current models

Current model

The model used for Lewsearch simulated research studies.

Public evaluations document the study configuration and its scope.

Current chatbot model

The current chatbot model in the Lewis family.

A separate public evaluation for this chatbot has not been established.

Plans confirmed October 21, 2026. Release dates and performance results have not been announced.

Next model. In development.

Next chatbot model. In development.

Planned model based on consented longitudinal human observations. Its name refers to Marcel Proust and his writing about memory and time.

Planned chatbot model based on Lewis Proust 3.

Planned research model. Further details have not been announced.