Largest open-weights AI lab via Llama (Llama 3.1 405B, Llama 4 405B). Operates Meta AI (the in-app assistant in WhatsApp, Instagram, Messenger, Facebook; over 1B monthly users cited 2025-Q2) and uses internal AI heavily for ad ranking (Andromeda, Lattice). AI is the largest single capex line at Meta (over $40B FY2024 capex, rising). Acquired roughly 49% of Scale AI in 2025 for a reported $14.3B-equivalent transaction that brought Alex Wang into Meta's superintelligence org.
