The Founder-Scientist Labs

Mira Murati closed a $2 billion seed round at a $12 billion valuation for Thinking Machines Lab on July 15, 2025, a figure large enough to fund a mid-size public company, attached to a startup that had yet to ship a product ¹. Ten months later, a third of her founding team had departed for rivals, and the same compensation war she left OpenAI to escape had followed her out the door ². The pattern repeats across a small cluster of labs built around a single scientist's reputation: eye-popping capital arrives first, then the market for the people who justify that capital tests whether the founder's gravity holds.

Murati's Team Learns What Nine Figures Buys

Thinking Machines drew heavily from OpenAI at its founding, and the roughly 150-person company Murati built has more than quadrupled since launch, according to American Bazaar's reporting ². Growth masked an exodus running in parallel. Three of six co-founders left; Meta recruited seven founding-team members plus one additional star researcher, OpenAI reclaimed five, and xAI pulled one more ². Departures accelerated once the standard one-year cliff on vesting equity passed, precisely the moment a rival's cash offer starts to outweigh unvested upside ². Engineer Joshua Gross, who helped build the company's flagship product Tinker "from zero to one," left after shipping it; co-founder Andrew Tulloch departed for Meta Superintelligence Labs on Oct. 12, 2025.

Plain dollar figures explain most of the churn. Recruiters pitched even rank-and-file Thinking Machines staff on packages starting near $1.5 million in cash, more than three times the $350,000-to-$475,000 band the company itself advertised, American Bazaar reported, while offers to senior founding members reportedly reached "well into nine figures" ². Lilian Weng, another prominent researcher, left Thinking Machines to rejoin OpenAI on July 30, 2026, in a departure reported alongside health struggles distinct from a straightforward counteroffer ³. Compensation covers most of the exits; a smaller remainder traces to personal circumstance, a distinction that matters for anyone reading Murati's roster as a pure pay story.

Sutskever Bets on Patience Instead of Product

Safe Superintelligence took the opposite path from Thinking Machines. Ilya Sutskever founded the company on June 19, 2024, and by September that year had raised $1 billion; the valuation reached $32 billion on a $2 billion round reported April 13, 2025, an ascent built entirely on Sutskever's reputation as OpenAI's former chief scientist ⁵. Co-founder Daniel Gross left the company for Meta Superintelligence Labs in July 2025, leaving Sutskever alone atop the company he started, a leadership shift that coincided almost exactly with the funding round that made SSI one of the world's most valuable pre-product startups. Multiple 2026 trackers describe SSI as still product-less, a company valued in the tens of billions on a research bet rather than a released model. Nvidia validated that bet on July 27, 2026, announcing a multibillion-dollar investment reported by Bloomberg near $5 billion, paired with compute access to Nvidia's Vera Rubin GPU platform expected to expand SSI's capacity "by an order of magnitude" ⁴. Sutskever's own framing captured the wager precisely: "We have research that is worthy of scaling up, and having access to a big NVIDIA computer will let us do so," he said, adding that the Vera Rubin partnership would take the company "to the next level" ⁴.

Andreessen Horowitz, Alphabet, Lightspeed, GV and Sequoia round out SSI's investor base, a roster that reads like a hedge against every other lab's approach rather than a bet on one architecture ⁴. SSI's structural bet is patience: forgo revenue, forgo a public model, and let a research agenda mature on someone else's clock. That approach only survives so long as its investors keep believing the wait produces a payoff eventually, distinct from a promise about when.

Discovery Loop Tests the Formula at Google's Scale

A group departure, rather than a single celebrity founder, built this next entrant, though the group itself carries celebrity weight. Jeff Dean, Sanjay Ghemawat, Oriol Vinyals and Quoc Le left Google on Aug. 5, 2026, to found Discovery Loop together, pursuing automated, recursive scientific-discovery systems that echo the research all four pursued inside Google ⁶. Alphabet itself backed the new company, converting a talent loss into an equity position, a hedge Google has used elsewhere as departures accelerated through 2026.

Four peers founded Discovery Loop together, a structure that diverges from Murati's and Sutskever's in a meaningful way, splitting the reputational risk a single founder-scientist carries alone. Reading the roster against Thinking Machines' churn suggests co-founder density functions as its own retention tool, since a rival recruiter has to pry loose an entire cohort rather than pick off individuals one signing bonus at a time.

LeCun and the Physical-World Wager

Yann LeCun left Meta on Nov. 20, 2025, and founded AMI Labs, which closed a $1.03 billion seed round on March 9, 2026, at a $3.5 billion valuation ⁷. The investor list spans Cathay Innovation, Greycroft, Hiro Capital, Bezos Expeditions, Nvidia, Samsung and Temasek, alongside angels including Tim and Rosemary Berners-Lee, Mark Cuban and Eric Schmidt ⁷. LeCun took the chairman title rather than chief executive, ceding day-to-day command to Alexandre LeBrun, formerly of Nabla and Meta's FAIR research group, while Laurent Solly, Meta's former Europe vice president, runs operations ⁷. AMI's stated wager targets world models, systems built to learn from physical reality instead of language corpora alone, a research direction LeCun championed for years before Meta's roadmap moved elsewhere. LeBrun's own framing carries a note of caution about the crowd he is about to join: "Every company will call itself a world model to raise funding" within months, he said, positioning AMI's differentiation as substantive rather than semantic ⁷.

Periodic Labs and Reflection AI complete the cluster with less name recognition but comparable capital velocity. Founded by former OpenAI and Google Brain researchers around an AI-for-science thesis, Periodic entered deal talks near a $7 billion valuation by March 25, 2026, per Bloomberg ⁸. Reflection AI, founded by former DeepMind researchers Misha Laskin and Ioannis Antonoglou to build open foundation models, sought investors at a valuation exceeding $20 billion by March 2, 2026, up from an $8 billion valuation on a $2 billion round the company closed in October 2025 ⁹. Both companies raised on team pedigree well ahead of commercial proof, the same formula Murati and Sutskever wrote first.

What the Formula Actually Buys

Investors underwriting these rounds are pricing a person or a small cluster of people, distinct from a product roadmap, a customer base or even a working prototype in several cases. That pricing model concentrates risk in a way traditional venture math rarely tolerates: lose the founder-scientist, and the valuation's foundation goes with them. Thinking Machines' experience through 2026 shows the risk compounds further, because a founder staying in place guarantees little about the team staying around her. Murati kept her seat. A third of the people she recruited to build around her chose a rival's instead.

Reflection AI, Periodic Labs and AMI Labs have avoided comparable public churn so far, though each remains younger than Thinking Machines and has yet to clear the one-year vesting cliff where Murati's departures concentrated. Discovery Loop's four-founder structure offers one hedge against the pattern; Sutskever's patient, product-free strategy offers another, betting that a team drawn to a long research horizon self-selects against the recruiters chasing quick liquidity. Whether either hedge holds through 2027 will say more about the founder-scientist model's durability than any funding announcement has said so far.

By the numbers

• Thinking Machines Lab's valuation reached $12 billion on a $2 billion seed round announced July 15, 2025 ¹.
• One-third of Thinking Machines' six-person founding team had departed by May 2026 ².
• Recruiters reportedly dangled a $1.5 million cash-compensation floor to Thinking Machines' rank-and-file staff, against an advertised $350,000-to-$475,000 salary band ².
• Safe Superintelligence's valuation reached $32 billion on a $2 billion round reported April 13, 2025 ⁵.
• Nvidia's reported investment in Safe Superintelligence, announced July 27, 2026, approached $5 billion ⁴.
• AMI Labs closed a $1.03 billion seed round March 9, 2026, at a $3.5 billion valuation ⁷.
• Periodic Labs' reported valuation in deal talks reached $7 billion as of March 25, 2026 ⁸.
• Reflection AI's targeted valuation in funding talks reported March 2, 2026 topped $20 billion ⁹.

What to watch

Thinking Machines' Tinker product will show whether a stabilized headcount can still ship on Murati's original cadence after the founding-team churn. SSI's next research disclosure, whenever it surfaces, will test whether Sutskever's patient bet converts Nvidia's compute infusion into results investors can point to. Discovery Loop's first published output will indicate whether a four-founder structure actually protects a lab from the individual raids reshaping its rivals.

Sources

1. Reuters, "Mira Murati's AI startup Thinking Machines valued at $12 billion in early-stage funding," Reuters (via TradingView), July 15, 2025, https://it.tradingview.com/news/reuters.com%2C2025%3Anewsml_L4N3TC1L6%3A0-mira-murati-s-ai-startup-thinking-machines-valued-at-12-billion-in-early-stage-funding
2. American Bazaar Staff, "One-third of Thinking Machines Lab founding team exits amid fierce AI hiring battle," American Bazaar, May 14, 2026, https://americanbazaaronline.com/2026/05/14/one-third-of-thinking-machines-lab-founding-team-exits-480782/
3. American Bazaar Staff, "Weng leaves Thinking Machines to rejoin OpenAI amid health struggles," American Bazaar, July 30, 2026, https://americanbazaaronline.com/2026/07/30/weng-leaves-thinking-machines-to-rejoin-openai-485496/
4. TechCrunch Staff, "Ilya Sutskever's Safe Superintelligence partners with Nvidia to scale its AI research," TechCrunch, July 27, 2026, https://techcrunch.com/2026/07/27/ilya-sutskevers-safe-superintelligence-partners-with-nvidia-to-scale-its-ai-research/
5. CTech Staff, "Ilya Sutskever's Safe Superintelligence raises $2 billion at $32 billion valuation," Calcalist (CTech), April 13, 2025, https://www.calcalistech.com/ctechnews/article/hjfywdtajl
6. TechCrunch Staff, "Jeff Dean and other top AI researchers are leaving Google to launch their own startup," TechCrunch, Aug. 5, 2026, https://techcrunch.com/2026/08/05/jeff-dean-and-other-top-ai-researchers-are-leaving-google-to-launch-their-own-startup/
7. TechCrunch Staff, "Yann LeCun's AMI Labs raises $1.03B to build world models," TechCrunch, March 9, 2026, https://techcrunch.com/2026/03/09/yann-lecuns-ami-labs-raises-1-03-billion-to-build-world-models/
8. Bloomberg News, "AI Science Startup Periodic Labs Is in Deal Talks at About $7 Billion Valuation," Bloomberg, March 25, 2026, https://www.bloomberg.com/news/articles/2026-03-25/ai-science-startup-periodic-labs-is-in-deal-talks-at-about-7-billion-valuation
9. Roic Staff, "Reflection AI Seeks Investors at Over $20 Billion Valuation Amid Rapid Growth," Roic, March 2, 2026, https://www.roic.ai/news/reflection-ai-seeks-investors-at-over-20-billion-valuation-amid-rapid-growth-03-02-2026