Osseus

Osseus is a Y Combinator backed company that supplies medical and biological data and training environments to frontier AI labs. It describes its long term goal as building medical superintelligence, and its current products are aimed at teams training and evaluating large models rather than at clinicians or patients. The offering has two parts. The first is datasets, both off the shelf and custom, covering patient histories and clinical conversations, pathology, molecular data and experimental results, curated for training and evaluation. The second is interactive environments for reinforcement learning, where a model works through multi step medical and biological tasks, gathers evidence, analyzes data and uses clinical or scientific tools, and receives feedback on accuracy, uncertainty and safe behavior. Osseus says it builds datasets with partners across different populations, conditions and settings to address the narrow range of people represented in existing medical data, and that it collects feedback from real world model deployments to find where models fail. It also releases separate benchmarks. The team has backgrounds at Imperial College London, Apple's machine learning and data teams, and a joint Harvard and HKU lab, with work spanning AI safety, health AI, robot learning and data systems. No pricing is published, and datasets and environments appear to be arranged directly with the company.