Meta AI

The open-source AI division of Meta, creators of the Llama model family. Meta's decision to release Llama as open-weight models has been one of the most consequential moves in AI history, democratizing access to frontier-class capabilities. The Llama 4 family uses Mixture-of-Experts architecture and supports context windows up to 10 million tokens, from the lightweight Scout (17B active params) to the massive Behemoth (2T total parameters).