PLUTO (PathAI)

PLUTO is PathAI's compact pathology foundation model, a vision transformer pretrained at multiple resolutions with DINOv2 combined with masked autoencoding, so the same network works at the magnification a given task needs. The 2024 arXiv paper describes a lightweight multi-scale model trained on 195M tiles from 158k slides across 50+ sites, and it powers PathAI's AISight platform and biomarker quantification tools. It is aimed at laboratories and pharma partners who need efficient inference across many tasks rather than a separate model for each. Being proprietary, its weights cannot be independently benchmarked or adapted by outside groups, so external claims rest on the company's publications and deployments. For a newcomer: it is a smaller, efficient slide-reading model that is already inside a commercial pathology product.