Cosmosage: A Specialized AI Assistant for Cosmology

Author

Andrea Zonca

Published

December 17, 2025

Cosmosage is an AI assistant specialized in cosmology. It has been trained on thousands of cosmology papers and textbooks, starting from a large-language model base and subsequently fine-tuned on cosmology-specific data and synthetic Q&A pairs. This specialized training enables it to answer domain-specific questions more accurately than general-purpose models.

We invite the community to try it out and share feedback, report bugs, or suggest features by leaving comments on the Hugging Face model page: https://huggingface.co/AstroMLab/AstroSage-70B

I assisted Tijmen de Haan with the deployment of this service on Jetstream 2.