Meta’s CTO defined the technical the explanation why the important thing Join keynote stay demos failed.
When you missed it: in the course of the Join 2025 primary keynote on Wednesday, the stay on-stage demos of two of Meta’s largest good glasses options failed.
In each instances, Mark Zuckerberg blamed the convention Wi-Fi. However now, in an Instagram ask-me-anything session, Meta CTO Andrew Bosworth has supplied a unique technical clarification for what prompted every failure.
The Ray-Ban Meta Reside AI demo failure.
The primary failure was the demo of the Reside AI function.
Obtainable within the US & Canada on all Meta’s AI-capable glasses, Reside AI lets you’ve got an ongoing dialog with Meta AI with out having to maintain saying “Hey Meta”, and the AI will get a steady stream of what you are seeing.
I attempted Reside AI whereas within the US, and I can affirm it really works as described. But it surely undoubtedly didn’t within the Join demo.
Influencer chef Jack Mancuso, who was in a kitchen on Meta’s campus, was in a position to begin the session by saying “Hey Meta, begin Reside AI”. Meta AI responded “I like the setup you’ve got right here with soy sauce and different components.” However when Mancuso requested what he ought to do first to make a Korean-inspired steak sauce for his sandwich, Meta AI merely stored repeating “You’ve got already mixed the bottom components”.
In response to Bosworth, when Mancuso mentioned “Hey Meta, begin Reside AI”, as a result of it was broadcast on the venue’s audio system, it began Reside AI on each Ray-Ban Meta within the constructing. And since Meta had rerouted campus Reside AI site visitors to a improvement server, in principle to isolate it and make sure the demo went nicely, the site visitors from all these good glasses overwhelmed the server.
Bosworth would not clarify why this prompted the AI to repeatedly suppose the components have been already combined. The charitable clarification might be that the failing server began serving cached responses from a rehearsal. Alternatively, it may have uncovered that Meta partially faked the demo.
In fact, what would forestall one thing like this from taking place in any respect can be for Meta to implement voice authentication. Alexa, Google, and Siri all help solely executing delicate instructions once they acknowledge your distinctive voice, however Meta AI doesn’t but have such a function.
The Meta Ray-Ban Show video name demo failure.
The opposite main Join demo failure occurred when Mark Zuckerberg, sporting the Meta Ray-Ban Show glasses and Meta Neural Band, tried to reply an incoming WhatsApp video name from Bosworth.
In principle, he ought to have been in a position to settle for the decision and see the caller’s digital camera stream on the heads-up show. And several other mainstream tech information shops, together with The Verge, have confirmed that they tried the video calling performance and that it labored. However within the demo, it didn’t.
As a substitute, Zuckerberg was unable to just accept Bosworth’s incoming name 4 occasions in a row, regardless of Meta AI asserting it, and the WhatsApp name sound taking part in. The CEO appeared visibly pissed off.
In response to Bosworth, what occurred right here is that the show went to sleep on the precise time the incoming name notification got here in, which prompted a race situation within the system software program, stopping that decision and any future calls from coming by way of. Bosworth says Meta had by no means run into that bug earlier than, regardless of operating video name exams “100 occasions”.
“That is a horrible, horrible place for that bug to indicate up”, Bosworth remarked, noting that it has now been mounted.
Reactions to the Join stay demo failures have been combined. Whereas many individuals are partaking within the anticipated schadenfreude at seeing Meta’s CEO squirm, others see Meta’s method of uncooked, unfiltered demos as a refreshing distinction to the extremely produced infomercial-style occasions of Tim Cook dinner’s Apple.
Additional, many inside the tech trade sympathize with Zuckerberg’s plight, understanding simply how cursed pre-launch tech demos typically are – and the way hardly ever this displays whether or not a transport product may have the identical points.
In his AMA session, Bosworth was additionally requested whether or not he nonetheless thought stay demos have been the proper method. This is how he replied:
“I am unsure what individuals suppose the chance actually is. I imply this, significantly, once more, It was nice. And go learn the articles and the press and the individuals who sat down with the glasses who’re critics a number of occasions, and in the event that they did not work they would not write good issues, you realize, they’re beneath no obligation to take action.
They put them on they usually used them, they usually’ll inform you it is legit and it really works simply high-quality. So I believe individuals truly would – underselling our audiences – audiences perceive, each within the room and on the published, why stay demos do not signify actual world eventualities.
You are not normally in a room with, I do not know, 2500 radios, 3000 radios, all going on the identical time on completely different units. Individuals perceive that. So, once more, clearly I did not need it to go that method. But it surely wasn’t that unhealthy and I assumed it got here out nice and I believe individuals belief us and know the product’s actual, and you’ll learn the critiques about it and check out it for your self in case you’re unsure”
Meta Ray-Ban Show Is Official & Contains Meta Neural Band For $800
The Meta Ray-Ban Show glasses are official, after months of rumors and a last-minute leak, priced at $800 with the Meta Neural Band included.

From September 30, Meta Ray-Ban Show will likely be accessible to demo at choose bodily US retailers, together with Finest Purchase, LensCrafters, and Ray-Ban Shops. So in case you’re within the US, you do not have to take Bosworth at his phrase – you’ll be able to head right into a retailer and check out it your self.