An open weightsA model whose trained parameters are published for anyone to download and run — unlike API-only models you can access but never possess.Full definition →, MIT-licensed 124B mixture-of-expertsA model built from many specialist sub-networks where only a few activate per token, giving big-model capability at small-model running cost.Full definition → with only 5.1B active parameters, specialized for medical reasoning and tool-using research workflows, now ships in FP8 for cheaper serving. It is a research model, not a medical device.
Terms in this piece · Glossary
mixture-of-experts — A model built from many specialist sub-networks where only a few activate per token, giving big-model capability at small-model running cost.
context window — The maximum amount of text a model can consider at once — its working memory for the current conversation or task.
tool use — A model's ability to call external functions — run code, search the web, edit files — instead of only generating text.
open weights — A model whose trained parameters are published for anyone to download and run — unlike API-only models you can access but never possess.
