A post-95s young man from Hangzhou purchased a Silicon Valley castle for 500 million yuan.

Where did all the co-founders of Elon Musk's xAI go after leaving the company?

Some started their own businesses, others switched to new jobs.

In contrast, Tony Wu (Wu Yuhuai) is very pragmatic and down-to-earth:

Bought a mansion in Silicon Valley.

Yes, you read that right, he is the post-95s generation from Hangzhou who appeared on stage arm in arm with Elon Musk at the Grok 3 launch event last year.

At the age of 31, he just spent a whopping 500 million yuan on a huge luxury house in the Bay Area... The life of a protagonist in a wish-fulfilling novel is as easy as pie for him!

What exactly is the story behind this?

Recently, the most high-value luxury home transaction in the San Francisco Bay Area so far this year was completed. Media traced related clues and found that the buyer points to Wu Yuhuai, a co-founder of xAI and "a young man engaged in the AI industry".

Last year, he just bought a top-tier residence for 12 million US dollars (equivalent to about 80 million yuan).

Wow, he is even playing the real-life "Monopoly" tech edition.

The transaction price is soaring just like SpaceX rockets. This historic largest IPO completed after xAI's integration brought him huge profits!

The most expensive luxury home in the Bay Area this year: Sold to Chinese xAI co-founder

The newly purchased manor is located in Hillsborough, the traditional wealthy district of Silicon Valley, covering an area of about 12 acres, with the main house spanning about 12,000 square feet and an additional 4,600-square-foot guest house.

Tennis courts, 9-hole golf course, 18-hole putting green, and koi ponds are just standard configurations. The manor also has a 150-seat open-air theater, a 2100-gallon aquarium, and a set of open-air fountains modeled after the Bellagio in Las Vegas.

The house was originally listed for 88 million US dollars. After a 10 million US dollar price cut, it was finally sold for 70 million US dollars (equivalent to about 500 million yuan) on August 6, becoming the largest residential transaction in Northern California so far this year.

Unlike its staggering luxury level, the identity of the buyer was kept strictly confidential.

Public records show that the property was purchased by a company called Daikon no Hana Capital. The company was registered on July 9, and its manager is a lawyer specializing in estate planning.

And he "happened to" transfer Wu Yuhuai's previous 12 million US dollar residence to a family trust one week before the new manor transaction was completed.

Even more coincidentally, the only other large residential transaction handled by the buyer's agent in the past 5 years is exactly the house that Wu Yuhuai bought in 2025.

Multiple clues point to him at the same time, and the identity of the real buyer is almost clear.

But compared to real estate investment, Wu Yuhuai was known earlier in the AI circle for his work on reasoning models.

Wu Yuhuai was born in Jiande, Hangzhou in 1995. He later went to the University of Toronto to pursue a doctorate in machine learning, studying under Roger Grosse and Jimmy Ba.

After graduating with his doctorate, he went to Stanford University for postdoctoral research. On his personal homepage, his research direction is written as "building machines that can reason".

Following this path, he has participated in projects such as StarCraft AI AlphaStar, self-learning reasoner STaR, mathematical model Minerva, and geometric reasoning system AlphaGeometry, and has worked and interned at OpenAI and Google.

Simply put, his main research focus is to enable models to generate reasoning steps, check the process, and continue learning from their own reasoning results.

This research line is exactly the current competitive hotspot in the large model industry.

In 2023, Elon Musk founded xAI, and Wu Yuhuai joined with his mentor Jimmy Ba, becoming one of the 12 co-founders. By the time Grok 3 was released, he had already been the core key figure of the reasoning team.

The core features of Grok 3, "think first, then answer", as well as the implementation of backtracking, verification and long-term deduction, are all productized applications of his years of previous research directions.

Until February this year, after xAI was merged into SpaceX, Wu Yuhuai announced his resignation. One day later, his mentor Jimmy Ba also announced his departure one after another.

At that time, he gave the reason:

In the next stage, I will explore a new chapter in my life, and I believe that a small team armed with AI can move mountains.

Half a year has passed, there is no news about his new company yet, but the equity he accumulated at xAI has once again sparked heated discussions in the form of luxury real estate.

Wealth creation by xAI

The merger of SpaceX and xAI at the beginning of the year has indeed achieved a 1+1>2 effect as it seems now.

The bundled IPO has refreshed the largest record in history, and the equity rights of all initial co-founders have multiplied several times.

U.S. securities documents disclose that after conversion, each share of xAI corresponds to 0.7165 share of SpaceX, which is worth about 115.32 US dollars according to the closing price on the first day of listing.

It is about 53% higher than the cash option of 75.46 US dollars per share provided by SpaceX to some eligible participants at the time of the merger.

However, the specific number of shares held by Wu Yuhuai has not yet been made public, and it is still unknown how much cash he has cashed out.

But judging from his current extravagant purchase behavior, the value of his equity is obviously huge, after all, the wealth creation scale of SpaceX itself is quite considerable.

According to media estimates, more than 4,400 current and former employees have become millionaires through the listing, and about 400 of them hold shares worth more than 100 million US dollars.

And such wealth leap stories are happening every day in Silicon Valley now.

After Anthropic and OpenAI go public one after another, more top AI talents will achieve continuous asset growth through equity mergers and super IPOs.

This group of front-line researchers are rapidly becoming the protagonists in the new round of Silicon Valley wealth landscape.

The most intuitive manifestation of this change is the housing price in the Bay Area:

The housing price has been rising steadily, with an increase of 14% in the past year alone.

Reference Links: [1]https://sfstandard.com/2026/08/12/xai-cofounder-hillsborough-buyer/[2]https://xhslink.cn/o/6g6pj41mkne[3]https://www.linkedin.com/in/yuhuai-tony-wu-02a641b5/[4]https://yuhuaiwu.github.io/

One-click triple action "Like", "Repost", "Send a Heart"

Welcome to leave your thoughts in the comment section!

This article is from WeChat official account "QbitAI", author: Focus on cutting-edge technology, published with authorization from 36Kr.