AI features that operate during a live meeting, with sub-second latency, rather than after the call is over. Examples: a private prompt-coach that suggests follow-up questions to the user as their counterpart speaks, on-the-fly definitions of unfamiliar acronyms, live translation overlays, and instant pull-up of relevant prior-meeting context when a name or topic is mentioned. Real-time assist is technically harder than post-call processing because the model has only milliseconds of context, must run continuously, and must not distract the user. The user-experience design is at least as important as the model — a real-time assist that pings the user every ten seconds is worse than no assist at all. The bar for shipping is high; the value when done well is also high.