Brad Lightcap is departing from OpenAI after eight years to pursue a new opportunity.

      Brad Lightcap, who dedicated eight years to OpenAI, four of which he served as chief operating officer, announced on Tuesday his decision to leave the company to pursue new ventures, although he did not disclose any details about what he plans to do.

      In a post on X, Lightcap expressed a mix of emotions about his departure, stating, "It is bittersweet to share that I’ll be moving on from OpenAI to start something new," a sentiment echoed in an internal memo he distributed the same day.

      He shared his belief that there are several significant new developments the world will need to address as we enter this next phase. "I’ll have more to share soon," he added, emphasizing his continued faith in OpenAI and his eagerness to further the mission from a different perspective.

      Lightcap joined OpenAI in 2018 after working at Y Combinator with Sam Altman and became COO in 2022. This past April, he transitioned from that role during a reshuffle, with most of his commercial responsibilities shifting to chief revenue officer Denise Dresser while he took on a special-projects role focused on complex deals and investments, reporting to Altman.

      In the interim, he developed the less glamorous aspects of OpenAI. "I had the privilege of building the first versions of most of our operations and business teams," he noted, "including Finance, Legal, People, CorpSec, GTM/Gov, Partnerships, and more."

      He played a key role in establishing the Deployment Company, an enterprise venture backed by over $4 billion from a syndicate of nineteen firms led by TPG, and in integrating Jony Ive’s hardware startup io, whose team he publicly welcomed last year.

      The timing of his departure is noteworthy; it comes just a day after OpenAI finalized a $7 billion employee tender offer that valued the company at $852 billion, reportedly two months after it filed confidentially for an initial public offering.

      Executives typically do not exit a pre-IPO cap table without a significant reason, and Lightcap has only indicated that "Sitting here today, mission success feels within sight."

      He is the ninth senior leader to depart since spring, following the exit of chief product officer Kevin Weil, Sora architect Bill Peebles, and enterprise CTO Srinivas Narayanan on the same day in April. Chief marketing officer Kate Rouch also stepped down that month, and Barret Zoph left in June after a brief return. Fidji Simo, the chief executive of applications and effectively the company’s second-in-command, transitioned to a part-time advisory role in July.

      Safety systems head Johannes Heidecke, AI ethics head Chloé Bakalar, and chief futurist Joshua Achiam also departed that month, with Bakalar being OpenAI’s only dedicated ethicist and not yet replaced.

      While some of the exits have benign reasons, and two were linked to health issues disclosed by the company at the time, collectively they represent a near-total turnover of the leadership team within roughly four months, while the company’s valuation has quadrupled during the same timeframe.

      Altman has not publicly commented on Lightcap’s departure, which is atypical for a CEO who usually shares warm farewells to departing executives. Lightcap concluded his note with an old internal joke, writing, “The old OpenAI meme that ‘the real AGI is the friends you made’ really rings true.” He plans to leave in a few weeks and has stated that he will reveal more about his future plans soon.