Mr. Zuckerberg delivered the remarks in a roughly half-hour address to thousands of employees at Meta’s Menlo Park, Calif., campus. The talk, made on an outdoor pavilion the company calls Hacker Square, was also livestreamed to tens of thousands of employees around the world.

It was one of Meta’s few major all-hands meetings over the last three years to be conducted in person, and included presentations from other Meta executives, like Andrew Bosworth, the chief technology officer, and Chris Cox, the chief product officer.

During the presentation, Mr. Cox detailed Meta’s plans for making improvements to Reels, Instagram’s short-form video product, to better take on TikTok, one of Meta’s most formidable competitors.

Executives also spoke about Project 92, a long-rumored social app in development at Meta that will function similar to Twitter. The app, executives said, will work with other apps like Mastodon and Bluesky.

While Meta has aggressively worked on A.I. for several years, it has been slower than competitors like Google and Microsoft to turn that research into consumer products. Mr. Zuckerberg on Thursday detailed plans for artificially intelligent assistants that aid people across all Meta’s apps, including WhatsApp, Messenger and Instagram.