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In a dramatic turn of events late Friday, ex-Y Combinator president Sam Altman was fired as CEO of AI startup OpenAI, the company behind viral AI hits like ChatGPT, GPT-4, and DALL-E 3, by OpenAI’s board of directors. Then, the company’s longtime president and co-founder, Greg Brockman, resigned — as did three senior OpenAI researchers. And the fallout continues.

It’s a fast-moving situation that we’re still trying to get to the bottom of. No doubt more will become clear as time goes on. To make it easier to follow all that’s happened in the meantime, though, we’ve put together a timeline; we’ll do our best to keep it current.

Timeline of Sam Altman’s firing from OpenAI January 5 The identity of OpenAI’s board observer has been revealed. According to Bloomberg, Microsoft has chosen Dee Templeton, VP for tech and research partnerships and operations and an advisor to Microsoft CTO Kevin Scott, as its non-voting board observer. Bloomberg says that Templeton has already begun attending board meetings; The Information previously reported that Templeton was being considered for the role.

November 29 Microsoft gains a board observer Microsoft will gain representation on the new initial board of directors in the form of a non-voting observer, OpenAI announced. It wasn’t immediately clear who this observer might be — only that they won’t have an official vote in board business.

November 21 Sam Altman, OpenAI reach agreement on return as CEO and ‘initial’ new board In a sudden late announcement, OpenAI revealed that it and Altman “have reached an agreement in principle” for him to return as the company’s CEO. In addition to Altman’s return, its new “initial” board will include former Salesforce chief executive Bret Taylor, former US Secretary of the Treasury Larry Summers and Quora founder Adam D’Angelo.

Altman also posted about the new deal, giving some insight into the roller coaster that we’ve all been riding since his firing was revealed Friday. In his words, his decision to join Microsoft on Sunday “was the best path for me and the team.” Since then, the new board’s composition and Microsoft’s support appear to have been enough to bring him back to the AI company he co-founded.

Altman and board in talks OpenAI’s board of directors is reportedly in talks with Sam Altman, ex-Y Combinator president and an OpenAI co-founder, to return to OpenAI as CEO as soon as this week. That’s according to Bloomberg, which in a brief — citing sources close to the matter — said that discussions are happening between Quora CEO Adam D’Angelo, one current member of the OpenAI board, and Altman and possibly other board members as well.

Board tensions boil over The New York Times reports that, before his ousting, Sam Altman made a move to push out board member Helen Toner because he thought a paper she had co-written was overly critical of OpenAI. That, among other issues, led to OpenAI’s current predicament. Speaking of, The Times indicates that negotiations to hire Altman back continue — but that one major sticking point remaining is “guardrails” meant to improve Altman’s communication with the board.

November 20 Altman joins Microsoft Sam Altman, Greg Brockman and colleagues announce that they’ll join Microsoft to lead a new AI research team. Nadella leaves the door open to other OpenAI staffers, saying that they’ll be given the resources they need should they choose to join.

Employees threaten to resign Nearly 500 of OpenAI’s roughly 770 employees — including, remarkably, Sutskever — publish a letter saying that they might quit unless the startup’s board resigns and reappoints the ousted Altman. Later Monday, that number climbed to over 650.

Altman and Brockman considering return As reported by The Verge, Altman’s move to Microsoft isn’t a done deal — and both Altman and Brockman are still open to returning to OpenAI. That is, if the remaining board members who initially fired him step aside.

OpenAI board considers merger OpenAI’s board of directors approached Dario Amodei, the co-founder and CEO of rival large-language model developer Anthropic, about a potential merger of the two companies, The Information reports. The approach was part of an effort by OpenAI to persuade Amodei to replace Altman as CEO — but Amodei quickly turned down the CEO offer.

November 19 Altman to meet at OpenAI HQ According to The Information, Altman is expected to meet at OpenAI’s San Francisco headquarters as executives at OpenAI push to have him reinstated as CEO. Brockman was invited to join — but it’s unclear whether he’ll take execs up on that invitation.

Board negotiations hit a snag Bloomberg reports that Lightcap and Murati, among others, are pushing the board to reinstate Altman. But unsurprisingly, the directors are resisting. As of midday Sunday, the board hadn’t resigned out of concern over who could replace them, and were vetting candidates. One possible new addition could be Salesforce co-CEO Bret Taylor.

Altman out, Shear in Altman won’t be returning as CEO, according to a report in The Information citing an internal memo sent by Sutskever. As the search for a new permanent CEO continues, OpenAI has appointed Emmett Shear, the co-founder of video streaming site Twitch, as interim CEO — replacing Murati.

November 18 “Not … in response to malfeasance” In an internal memo obtained by Axios sent Saturday morning, OpenAI COO Brad Lightcap said yesterday’s announcement “took [the management team] by surprise” and that management had had “multiple conversations with the board to try to better understand the reasons and process behind their decision.” Discussions were ongoing as of Saturday morning, per the memo.

“We can say definitively that the board’s decision was not made in response to malfeasance or anything related to our financial, business, safety, or security/privacy practices,” Lightcap added. “This was a breakdown in communication between Sam and the board … We still share your concerns about how the process has been handled, are working to resolve the situation, and will provide updates as we’re able.”

OpenAI’s funding in jeopardy The planned sale of OpenAI employee shares that would value the startup at about $86 billion could be in jeopardy. The Information, speaking to three sources formerly with the company, reports that they no longer expect the sale — led by Thrive Capital — to happen, or, if it does, to come with a lesser valuation because of the recent turn of events.

Altman planning new venture Altman has been telling investors that he’s planning to launch a new venture, according to The Information. Brockman is expected to join the effort — whatever form it takes. (Possibly an AI chip startup.)

Investors pushing for Altman’s return Investors — furious at the turn of events — are reportedly exerting pressure on OpenAI’s board to reinstate Altman, going so far as to recruit Microsoft. Nadella is said to be sympathetic.

Board agrees to reverse course — in principle The Verge reports that the board agreed in principle to resign and to allow Altman and Brockman to return. It waffled, however, missing a deadline yesterday by which many OpenAI staffers were set to leave the company. Altman is said to be ambivalent about coming back and asking for “significant” governance changes.

November 17 Brockman demoted Brockman says he got a text from Sutskever shortly after noon on Friday asking for a quick call. After sending a Google Meet link, Brockman was told that he was being removed from the board as chairman “but was vital to the company and would retain his role” as president, and that Altman had been fired.

Altman’s firing publicly announced OpenAI published a post on its blog announcing the executive shake-up. The company’s management team was aware shortly after.

All-hands meeting OpenAI held an all-hands meeting Friday afternoon during which Sutskever defended Altman’s ouster. He dismissed suggestions that pushing Altman out amounted to a “hostile takeover,” and claimed that it was necessary to protect OpenAI’s mission of “making AI beneficial to humanity.”

Microsoft releases a statement Satya Nadella, the CEO of Microsoft, a major investor in — and partner with — OpenAI, published a statement about Altman’s firing:

“As you saw at Microsoft Ignite this week, we’re continuing to rapidly innovate for this era of AI, with over 100 announcements across the full tech stack from AI systems, models and tools in Azure, to Copilot. Most importantly, we’re committed to delivering all of this to our customers while building for the future. We have a long-term agreement with OpenAI with full access to everything we need to deliver on our innovation agenda and an exciting product roadmap; and remain committed to our partnership, and to Mira and the team. Together, we will continue to deliver the meaningful benefits of this technology to the world.”

Senior OpenAI researchers resign Three senior OpenAI researchers resign after Brockman, including the director of research Jakub Pachocki and head of preparedness Aleksander Madry.