CEO & Founder, Fractile Building the future of planet-scale AI inferencing

London, UK
Joined February 2020
🕊️
More Jensen Huang. This time: what does he think of British chip makers like @fractile_ai and @OLIXComputing? His response is fascinating
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We need faster chips to make scientific discoveries faster. Very pleased to be supporting @sotalikesfuture 🚀
SoTA Scientific Parallelism Hackathon | 21st-22nd November | London Which scientific questions could we investigate better if computation were faster or could run at a greater scale? The Society for Technological Advancement (@sotalikesfuture), supported by Callosum (@CallosumAI), Inherent Labs (@inherent_labs), the Advanced Research + Invention Agency (@ARIA_research) and Fractile (@fractile_ai), is holding a hackathon to tackle open scientific questions that could benefit from faster computation or experiments at a greater scale. Contestants will use parallel computing on challenges across biology, chemistry, physics, materials science, astronomy, and Earth sciences – pushing GPUs to their limits and rethinking architectures for this new paradigm.
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Walter Goodwin retweeted
🚨 NEW: The US has now restored the UK’s access to unreleased AI models after lobbying from AI Minister Kanishka Narayan
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This is a very strong showing for model efficiency. One of the most exciting effects of having open models built right next to the ecosystems that scale and deploy them is that we are going to see some very effective pressures toward fast hill-climbing in model-hardware co-design. Looks like Reflection has already been very thoughtful on how to maximise intelligence-per-FLOP 🚀
Replying to @reflection_ai
Beam leads in inference efficiency for its model class -- 3-4x more efficient than GLM 5.2 and over 4x more efficient than leading Western open models. This means Beam completes tasks faster and cheaper.
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Very fun talking with @saranormous about why the world needs semiconductor companies that are wired for the extraordinary needs of AI today, and why @fractile_ai is a frontier AI company, not just a chip builder 🚀
Really fun @NoPriorsPod with @goodwin_ml founder of @fractile_ai topics: - how to win the ai chip market, structurally - ai for chip design, what’s compressible - the need to be a frontier lab to serve frontier labs - solving memory bandwidth - new hardware scaling laws
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Walter Goodwin retweeted
it’s 2028. you ask your agent to buy ingredients for soup. it notices carrots are 10¢ more expensive than usual. it reroutes agricultural shipments, floods the west coast carrot market and triggers a diplomatic incident with canada. your groceries arrive. total savings: 23¢.
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Walter Goodwin retweeted
we made an unhinged video to let you know that you’re overpaying for your tokens… …and there’s something you can do about it. Introducing Doubleword. 🕊️✨🙏 LET THERE BE TOKENS 🙏✨🕊️
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The biggest economic opportunity is in the advanced manufacturing behind AI chips. Britain has the talent. It’s time for us to grab more of the opportunity! 🇬🇧
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Walter Goodwin retweeted
If London had Washington DC’s homicide rate (2024), it would have around 2,500 murders a year. The true figure is about 100.
Replying to @MaxE2review
"London is a much safer city than any city in the United States." Imagine believing this.
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At @fractile_ai we look to hire the people that we call ‘killers with a heart’ — driven, intensely capable, but also warm and present. @saranormous is a killer with a heart who I am proud to count as an investor!
In 2018, Sarah Guo became the youngest general partner in Greylock's 60-year history. She was 28. Four years later, she quit to launch Conviction, a firm staked entirely on AI. Before ChatGPT shipped, she seeded Baseten and Harvey; each is now worth over $11 billion. In Conviction's first year, she wrote early checks into Sierra, Cognition, and Mistral; those three companies are now worth, together, $54 billion. Andrej Karpathy worked out of Conviction's office until Anthropic hired him in May. Guo has been close to Jensen Huang for over a decade. Her first two calls after starting the firm were to Sam Altman and Nat Friedman. And yet the investor closest to the AI frontier is betting against its biggest companies. The two big frontier labs, worth close to a trillion dollars apiece, no longer just want to build the models. They also want to build every product and company on top of them, leaving nothing for anyone else. The market is paying as though they might succeed. Of the $300 billion in venture capital deployed in the first quarter of 2026, the biggest quarter in the history of the trade, 65% went to only four companies: Anthropic, OpenAI, xAI, and Waymo. Guo is betting the labs can't build everything, and she spends her days making sure of it. She won Harvey its first client. She flew across the country to take a single Baseten candidate to a four-hour lunch. On one wedding anniversary, she spent the whole weekend on back-to-back calls, keeping two founders on the line so they couldn't speak to rival firms. Twice a year, she flies the world's brightest young founders to San Francisco and inducts them into the fight. In the months @domcooke spent reporting this piece, @saranormous had her fourth child, walked the Met Gala in 45 pounds of chainmail, and still answered her founders' texts within minutes. Guo's parents arrived from China in 1987 with $50, built a company, and took it public at $1.2 billion. Then it went bankrupt. Guo grew up inside that startup. She built its first website, did her homework in a cubicle, and slept over for bug bashes. She loved it. If two labs build everything, no one gets to do that again. Welcome to Sarah's Wager. Read it below.
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Walter Goodwin retweeted
Two years ago, we funded Fractile as part of our Scaling Compute programme. Today, Fractile have announced a $220M funding round to build the next generation of inference hardware. Huge congratulations to Walter and the team. We can't wait to see what you do next 🚀
I am thrilled to share the news that Fractile's mission to build chips and systems that unlock the next generation of AI scaling has been bolstered, with a $220M funding round led by Accel, Factorial Funds, and Founders Fund, alongside some incredible backers old and new. AI inference is driving the defining infrastructure buildout of the 21st Century. We've written a bit about where we think capabilities must go, and how Fractile is working to bring this about: fractile.ai/news/fractile-ra… It has been a privilege working on one of the hardest but most rewarding technical challenges of our time for over three years, with the most brilliant, kind and driven people I could have ever hoped to work alongside. We are still just getting started. There is a lot to be done to deliver on our goals, but we are grateful to have the support of so many people in chasing these down every minute of every day. Thanks, all, for being part of the Fractile mission! 🚀 @fractile_ai
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Walter Goodwin retweeted
Big congratulations to Walter and team! Amazing work. Really feels like we’re entering a golden age for UK AI 🇬🇧🚀
I am thrilled to share the news that Fractile's mission to build chips and systems that unlock the next generation of AI scaling has been bolstered, with a $220M funding round led by Accel, Factorial Funds, and Founders Fund, alongside some incredible backers old and new. AI inference is driving the defining infrastructure buildout of the 21st Century. We've written a bit about where we think capabilities must go, and how Fractile is working to bring this about: fractile.ai/news/fractile-ra… It has been a privilege working on one of the hardest but most rewarding technical challenges of our time for over three years, with the most brilliant, kind and driven people I could have ever hoped to work alongside. We are still just getting started. There is a lot to be done to deliver on our goals, but we are grateful to have the support of so many people in chasing these down every minute of every day. Thanks, all, for being part of the Fractile mission! 🚀 @fractile_ai
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I am thrilled to share the news that Fractile's mission to build chips and systems that unlock the next generation of AI scaling has been bolstered, with a $220M funding round led by Accel, Factorial Funds, and Founders Fund, alongside some incredible backers old and new. AI inference is driving the defining infrastructure buildout of the 21st Century. We've written a bit about where we think capabilities must go, and how Fractile is working to bring this about: fractile.ai/news/fractile-ra… It has been a privilege working on one of the hardest but most rewarding technical challenges of our time for over three years, with the most brilliant, kind and driven people I could have ever hoped to work alongside. We are still just getting started. There is a lot to be done to deliver on our goals, but we are grateful to have the support of so many people in chasing these down every minute of every day. Thanks, all, for being part of the Fractile mission! 🚀 @fractile_ai
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Walter Goodwin retweeted
Replying to @Steve_Yegge
Maybe tell your buddy to do some actual work and to stop spreading absolute nonsense. This post is completely false and just pure clickbait.
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Walter Goodwin retweeted
Replying to @elonmusk @WSJ
I think it depends on how much you care about people in general vs. your own kin. I do intend to have kids, but I still feel like I have a strong personal stake in the future because I care a lot about people thriving, even if they're not related to me.
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Walter Goodwin retweeted
I've been working on this essay for a while, and it is mainly about AI and about the future. But given the horror we're seeing in Minnesota, its emphasis on the importance of preserving democratic values and rights at home is particularly relevant.
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Walter Goodwin retweeted
Our position on Greenland is very clear – it is part of the Kingdom of Denmark and its future is a matter for the Greenlanders and the Danes. We have also made clear that Arctic Security matters for the whole of NATO and allies should all do more together to address the threat from Russia across different parts of the Arctic. Applying tariffs on allies for pursuing the collective security of NATO allies is completely wrong. We will of course be pursuing this directly with the US administration.
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Walter Goodwin retweeted
For the rest of us: we are impotent and they know it. There’s no point in being angry unless we can do something about it. Economic growth is required for our self-defence and autonomy. Growth, so that we can defend ourselves, has to override every other thing we care about.
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