  cosmosage is a natural-language assistant intended for a wide audience, from
laypersons interested in cosmology to students, teachers, and professional
cosmologists. cosmosage provides a novel way to access knowledge and reason
about cosmology. Leveraging the power of advanced large language models (LLMs),
cosmosage has learned from a vast corpus of open-access source texts, including
textbooks and papers. cosmosage is found to be state-of-the-art on the narrow
task of answering questions about cosmology, outperforming all general-purpose
models. The model parameters and code are publicly available.
