{"entity":{"id":"h-optimus","kind":"technology","name":"H-optimus (Bioptimus)","aka":[],"tldr":"An open 1.1-billion-parameter pathology model from a French startup, among the strongest on public benchmarks.","summary":"H-optimus is a ViT-giant vision transformer for histopathology from the French company Bioptimus, pretrained with the DINOv2 self-supervised method so it learns tissue features without labels. H-optimus-0 (2024) was trained on hundreds of millions of tiles from 500k slides and led public benchmarks on release; H-optimus-1 followed. The weights are open and available for research and commercial licensing, which makes the model a common backbone for groups building their own biomarker or diagnostic classifiers. The gap is clinical: it has less clinical validation than commercial products that have gone through regulatory review, so users must validate downstream tasks themselves. For a newcomer: it is a strong, freely downloadable pathology model that other tools can be built on, not a diagnostic product in itself.","status":"emerging","asOf":"2026-09-08","links":[{"label":"Hugging Face model card","url":"https://huggingface.co/bioptimus/H-optimus-0"}],"tags":["foundation-model","pathology"],"related":[],"cancers":[],"sections":["ai-computation"],"technologies":["pathology-foundation-model"],"targets":[],"drugs":[],"companies":["bioptimus"],"institutions":[],"pathways":[],"terms":[],"trials":[],"people":[],"bottlenecks":[],"keyPapers":[],"journals":[],"dependsOn":[],"notes":[],"principle":"H-optimus is a ViT-giant pretrained with DINOv2.","strengths":["Open weights","Benchmark leader on release"],"limitations":["Less clinical validation than commercial products"],"since":2024},"route":"/technologies/h-optimus/","neighbours":{"section":[{"id":"ai-computation","kind":"section","name":"AI & Computation","route":"/fronts/ai-computation/"}],"technology":[{"id":"pathology-foundation-model","kind":"technology","name":"Pathology & radiology foundation models","route":"/technologies/pathology-foundation-model/"}],"company":[{"id":"bioptimus","kind":"company","name":"Bioptimus","route":"/companies/bioptimus/"}],"roadmap":[{"id":"ai-oncology-roadmap","kind":"roadmap","name":"AI in oncology roadmap: pattern readers → foundation models → agents in the workflow","route":"/roadmaps/ai-oncology-roadmap/"}]}}