Soumith Chintala
About Soumith Chintala
Soumith Chintala is an AI researcher and engineer based in New York. He grew up in Hyderabad, India, and studied at NYU and VIT Vellore. His personal site describes him as an AI researcher, engineer and community builder.
He co-founded PyTorch and maintained Torch-7. He spent 11 years at Meta, including about eight years leading PyTorch, and announced in November 2025 that he was leaving Meta and stepping down from PyTorch. According to the AI Engineer conference bio, he became CTO of Thinking Machines Lab in January 2026 and keeps an affiliation with NYU. His site says his current focus is AI infrastructure, AI research and robotics.
His site says he occasionally invests. He says he mostly invests within his network, when friends start companies, and rarely otherwise. The companies he names there are Runway, 1X, Osmo, Anthropic, Together.ai and Lepton, among others.
Crunchbase lists 8 personal investments: Mowito, RadixArk, UMA (Universal Mechanical Assistant), OpenHands, Odyssey, Together AI, Osmo and Hot Games. Tracxn dates his Runway investment to its $50M Series C in December 2022 and his OpenHands (All Hands AI) investment to its $5M seed in September 2024.
Most of his disclosed investments are in AI. These include AI infrastructure (Together AI, RadixArk, Lepton), AI agents for software development (OpenHands), generative video and world models (Runway, Odyssey) and robotics (1X).
RadixArk is his most recent AI round on the Lounge deals desk, a $100M seed listed as January 2026. RadixArk's launch press release describes the round as led by Accel and names him as an investor. It describes him as the PyTorch creator and CTO of Thinking Machines Lab. RadixArk builds on the SGLang inference project.
The public record shows seed and early-stage rounds in AI infrastructure, developer tools, generative models and robotics, mainly in the United States. He has said he invests mostly through his own network. He has not published a check size, so none is given here.
- RadixArk: AI inference infrastructure company built around SGLang; $100M seed.
- Runway: AI tools for generating video and world simulations; he is listed in its Series C (December 2022).
- OpenHands (All Hands AI): AI software development agents; he is listed in its seed round (September 2024).
- Together AI: AI infrastructure company; he is listed in its Series A.
- Odyssey: listed as a seed investor on Crunchbase.
- Osmo: listed as a Series A investor on Crunchbase.
- Anthropic, 1X and Lepton: named on his personal site, with no round or year given.
- soumith.ch
- crunchbase.com/person/soumith-chintala
- tracxn.com/d/people/soumith-chintala/__yRsRBFrFptSG0csW2u03dt1Xd3DlqLQ
- ai.engineer/speakers/soumith-chintala
- x.com/soumithchintala/status/1986503070734557568
- businesswire.com/news/home/20260505077157/en/RadixArk-Launches-with-$1
- crunchbase.com/funding_round/odyssey-4336-seed--35d862e7
- crunchbase.com/funding_round/together-1a7e-series-a--3a8ef82d
Investing activity
Soumith Chintala appears in 1 AI deal tracked by the Lounge deals desk, rounds totalling $100M. The rounds are mostly Seed, with a median round size of $100M. The most recent is RadixArk (Seed, $100M, Jan 2026).
Soumith Chintala most often invests alongside Spark Capital, Accel, AMD and Hock Tan, and the companies they back on Lounge are mostly in AI Infrastructure.
Deals
Frequently asked questions about Soumith Chintala
Does Soumith Chintala invest in AI startups?
Yes. His disclosed investments include Runway, Together AI, OpenHands, Odyssey, RadixArk, 1X and Anthropic. He describes his investing as occasional.
How do founders get Soumith Chintala to invest?
He says he mostly invests when friends start companies and rarely otherwise, so a cold pitch is unlikely to be his usual route. His site gives a Gmail address built from his first name.
What is Soumith Chintala's check size?
He has not published one, so any figure would be a guess.
What is Soumith Chintala known for?
He co-founded PyTorch and led it at Meta. He is now CTO of Thinking Machines Lab.
What stage does Soumith Chintala invest in?
His known rounds range from pre-seed and seed to Series A and C. He has no stated stage preference.
Where is Soumith Chintala based?
He lives in New York.
Is Soumith Chintala an angel investor?
Yes. Soumith Chintala invests personally as an angel.
What AI companies has Soumith Chintala invested in?
Soumith Chintala's AI investments include RadixArk. The 1 round on Lounge are listed on this page with amounts, dates and co-investors.
What stage does Soumith Chintala invest at?
In the rounds tracked on Lounge, Soumith Chintala has invested at Seed, with a median round of $100M.
Who does Soumith Chintala co-invest with?
Soumith Chintala's most frequent co-investors on Lounge are Spark Capital (1 deal), Accel (1 deal), AMD (1 deal), Hock Tan (1 deal) and John Schulman (1 deal).