Killed by Meta
Meta has shut down 5 AI products tracked here — 3 models, 1 services, 1 hardwares. By year: 2017: 1, 2022: 1, 2023: 1, 2025: 1, 2026: 1. The first was Facebook AI Chatbots (Bob & Alice) (June 20, 2017); the most recent is Meta Llama API (July 6, 2026). Each tombstone links its source.