AI interpretability. prev co-founded @thirdweb at @fdotinc. @UCBerkeley.

Joined November 2011
15 Photos and videos
I am building a team. If you're really really really good at building stuff, design, filmmaking, writing, pushing the models to their limits, or just making people care about a product at mass, certainly reach out. Let's collab make stuff. Details: docs.google.com/document/d/1…
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I've stepped down from @thirdweb. After 4 years as co-founder and CTO, building this company from the ground up, scaling the team to 50 , shipping tools developers need to build onchain apps, it's been one of the most rewarding experiences of my career. I got to work alongside some genuinely brilliant people across engineering, product, business, and marketing. The kind of people who challenged me, inspired me, and made me better at what I do. Lucky to have learned from every one of them, and especially grateful to have built this alongside @FurqanR an incredible co-founder and partner. The crypto industry looks nothing like it did when we started. The use case has sharpened: disrupting financial rails. I'm excited to watch the team take thirdweb to the next level. I'll always be cheering from the sidelines. At thirdweb, we built and deployed multiple AI agents across our product and org. I watched AI go from a nice-to-have to something that fundamentally changed how we worked. That experience shifted my thinking. In early 2025, I only trusted AI with non-critical parts of the codebase. That has changed. Over the last couple of months, I've trusted it to build critical-path systems. It still demands proper system design, planning, and testing. But the gap between what AI can do and what we let it do is closing fast. I don't think anything matters more than AI right now. Not as hype, but as a practical shift in how software gets built and used, how teams operate, how entire industries reorganize. So I'm going all in. Right now, i'm researching, experimenting, and building in AI. If you're working on something interesting, I'd love to hear about it -- let's connect!
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software engineering is shifting from writing code to designing the world agents work in. the real skill now is crafting the environment for the agents to thrive. maybe it’s time to update the job title.
New Engineering blog: We tasked Opus 4.6 using agent teams to build a C compiler. Then we (mostly) walked away. Two weeks later, it worked on the Linux kernel. Here's what it taught us about the future of autonomous software development. Read more: anthropic.com/engineering/bu…
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6 Nov 2025
it's consistent with what we found ~6 months ago. switching to code execution tools reduces our agents latency significantly x.com/jakeloo/status/1922717…

4 Nov 2025
New on the Anthropic Engineering blog: tips on how to build more efficient agents that handle more tools while using fewer tokens. Code execution with the Model Context Protocol (MCP): anthropic.com/engineering/co…
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Jake Loo retweeted
17 Jul 2025
4x FASTER. we now default to eip7702 execution for server wallets instead of erc4337. sending to confirmation: 2 secs (~4x faster than 4337!). as fast as a EOA tx, but with gas sponsorship, atomic batching and session keys support!
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Jake Loo retweeted
we just open sourced engine-core 2 years 7 months of our learnings distilled into 25k lines of production Rust. this is the best thing I've ever built as an engineer. our first open source rust repo at @thirdweb. let me tell you about my baby:
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Jake Loo retweeted
9 Jul 2025
The Dead Internet Theory claims all online content will be AI generated - destroying the internet experience. Blockchains will solve this problem. Our Founder and CEO @FurqanR explains how. 👇
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25 Jun 2025
making ai multiplayer multiplies intelligence it forces clear communication, and that will lead to better results this will be the norm for how work gets done
We made Claude, but multiplayer. For the first time (ever) -- you can collaborate with a model others in the same exact chat. Demo available now:
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12 Jun 2025
This is so exciting - LLMs, but for the physical world V-JEPA 2: real-world video in -> next action out LLMs: text in -> next token out Combining them is gonna be wild: LLMs as brains, V-JEPA as bodies. Robotic agents that plan and act are almost here
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2 Jun 2025
As companies scale up, they ship more slowly. Why? Coordination. It requires multiple people to ship. An AI agent works across the stack. From reading code and product specs to producing content. Zero coordination needed No more "finding time on your calendar". It just ships
2 Jun 2025
The wildest AI takes are "it's not good enough yet" or "it can't do X well." This completely ignores the exponential improvement curve we're on. If you don't believe every aspect of digital work will reach human-level quality soon, you're setting yourself up for failure. Agents are already handling tasks that required entire teams a few years ago. The building blocks for autonomous digital work is already here. Most people aren't ready for how fast this will impact every company on the planet. Jobs will transform, companies will become leaner, but we'll also see an explosion of new startups. We're entering the greatest entrepreneurial opportunity in decades.
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27 May 2025
Interpretability gives users direct control over AI systems to get their tasks done
27 May 2025
We created a canvas that plugs into an image model’s brain. You can use it to generate images in real-time by painting with the latent concepts the model has learned. Try out Paint with Ember for yourself 👇
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22 May 2025
The development time has gone down so much that it's more impactful to just ship, learn and iterate
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21 May 2025
Eval-driven development (EDD) is the new test-driven development (TDD)
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20 May 2025
There's a big shift happening in how we learn online Search-based learning required knowing what to look for and refining queries yourself LLMs make learning more collaborative and exploratory - they help you discover the right questions “good at googling” is now irrelevant
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Jake Loo retweeted
16 May 2025
IT'S DEMO DAY 🎉 Come see 30 of the most exciting web3 startups demo their apps, including ◆ Onchain AI Agents ◆ Blockchain games ◆ Consumer crypto apps x.com/i/broadcasts/1vAxRDbAn…

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16 May 2025
this is gonna change the engineering field completely just knowing how to code isn't enough anymore, and the engineering manager's role will go away staff engs will make 10x the impact understanding product, business, and systems is more critical than ever
16 May 2025
today we are introducing codex. it is a software engineering agent that runs in the cloud and does tasks for you, like writing a new feature of fixing a bug. you can run many tasks in parallel.
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14 May 2025
Releasing a new architecture for @thirdweb Nebula! It’s now cheaper, faster, and more accurate. Over the past couple of months, we’ve tested 5 different agent architectures, each a step forward in speed and accuracy. What’s changed? 🧵
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14 May 2025
We're constantly experimenting with crypto AI agents - this is just the start! More exciting updates coming soon. :) Shoutout to @cjberragan for shipping this!
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