Siri-revamp engineer Kelsey Peterson leaves Apple to join OpenAI

Kelsey Peterson, the Apple executive who introduced the company’s overhauled Siri vision at WWDC 2024, has left Apple and joined OpenAI, according to a post Sunday from Bloomberg’s Mark Gurman. Gurman wrote that Peterson “just started at OpenAI,” making the move notable because she had been one of the most visible faces tied to Apple’s still-unshipped Siri overhaul. Daring Fireball, linking to Gurman’s post, described Peterson as “the Apple AI employee who introduced the never-launched Siri revamp in 2024.” ### Who is Kelsey Peterson in Apple’s Siri story? Kelsey Peterson was the Apple executive who publicly walked through the company’s next-generation Siri plans during the Apple Intelligence launch in June 2024. In coverage of that event, CNBC quoted Peterson, identified as Apple’s director of machine learning, saying Siri would have “the ability to take hundreds of new actions in and across apps.” (daringfireball.net) The June 2024 presentation mattered because Apple positioned Siri as a more capable assistant that could use personal context, understand on-screen content and act across apps. Peterson became associated with that effort because she was the executive presenting those capabilities when Apple first showed them to developers and consumers. (nbcnews.com) ### Why does her exit stand out now? March 7, 2025 was the date Apple publicly acknowledged that the “more personalized” Siri features were taking longer than expected. Apple said at the time that the work would arrive “in the coming year,” and Craig Federighi later repeated at WWDC 2025 that the project “needed more time to reach our high quality bar.” (nbcnews.com) June 12, 2025 reporting from Bloomberg, summarized by 9to5Mac, said Apple had shifted the target for the delayed Siri upgrade to iOS 26.4, typically released in March, after earlier internal targets slipped from fall 2024 to early 2025 and then later in 2025. The same report said the delays stemmed from engineering problems in a hybrid architecture that combined old and new systems. (axios.com) ### What exactly happened to the Siri revamp she helped unveil? Apple never shipped the Siri experience it previewed in 2024. The promised upgrade was presented as a more conversational assistant able to use a customer’s data and app context to complete multi-step requests, but Apple later delayed those features. (9to5mac.com) WWDC 2025 did not bring a public relaunch of that Siri effort. Instead, Federighi said only that Apple was continuing the work and would share more in the coming year, leaving the 2024 Siri presentation as an unusually prominent product preview that had still not reached users by mid-2026. ### Why does OpenAI matter in this particular move? (nbcnews.com) OpenAI is not just another AI employer in Apple’s orbit. Bloomberg reported in 2025 and 2026 that Apple had explored outside model providers for Siri, including OpenAI and Anthropic, as it tried to recover from delays in its in-house assistant plans. That backdrop makes Peterson’s move to OpenAI more closely watched than a routine job change. (macrumors.com) Gurman’s post did not say what role Peterson would hold at OpenAI, and neither company had publicly detailed the move in the materials reviewed for this article. ### What comes next for Apple’s assistant work? June 8 is the scheduled start of Apple’s WWDC 2026 conference, where investors and developers are again expected to look for updates on Siri and Apple Intelligence. (techrepublic.com) Gurman’s post said Peterson’s departure means Apple will have “someone new next month” for another Siri-related WWDC moment. Apple’s most recent publicly reported internal target for the delayed Siri upgrade was iOS 26.4, according to Bloomberg’s June 2025 reporting, while Apple’s public language has remained that it will share more “in the coming year.” OpenAI, meanwhile, has not publicly outlined Peterson’s start date beyond Gurman’s report that she had already begun. (daringfireball.net) (9to5mac.com)