This topic brief explores Large Action Models (LAMs) as a new category of AI systems that can autonomously perform multi‑step actions within software environments. It assesses their potential for automation, human‑machine collaboration, and productivity gains across sectors. Issues such as transparency, reliability, safety, and governance challenges—especially regarding autonomy and system oversight—are analyzed. The report highlights both the transformative potential and the early‑stage risks associated with deploying LAMs in real‑world contexts.