Anthropic just bought your favorite JS runtime...

A few days ago, there was a massive acquisition that no one saw coming.

Anthropic, the AI research company behind Claude, acquired Bun, the all-in-one JavaScript and TypeScript toolkit that I first talked about on this channel back in 2022. The reason no one saw this coming is because just a

few weeks ago, we were told that software engineering is done, but by a member of Claude Code's technical staff.

Clearly, Daario didn't get the message or they could have saved themselves a lot of money. In today's video, we'll break down how the Bun team got here, what it means for the future of Bun, and how everyone but you is getting filthy

rich in the AI bubble. It is December 5th, 2025, and you're watching the code report. When the average developer runs

report. When the average developer runs into slow build times, they check Twitter while they wait. But when Jared Sumner runs into slow build times, he ports ES builds JSX and TypeScript transpiler from Go to Zig, creating a

new compiler to speed up the process. At

least, this was the origin story of Bun.

But back in 2021, when his initial tweet about his new compiler caught some traction, he discovered everyone else was also sick of how slow the JavaScript ecosystem had become. The only problem is that we were just too dumb to fix it

ourselves. So Jared did what any former

ourselves. So Jared did what any former Stripe Teal fellow high school dropout would do. He moved to Oakland and spent

would do. He moved to Oakland and spent a year making his GitHub graph look like this. His bank account looked like this

this. His bank account looked like this and Bun look like this. The fastest

all-in-one bundler, transpiler, runtime, testr runner, and package manager in the game. This was enough to get him a $7

game. This was enough to get him a $7 million seed round from Kleiner Perkins, from which he immediately pissed off the internet by saying, "If you wanted to come work for Bun, you better be ready to grind." And despite the backlash,

to grind." And despite the backlash, that's exactly what him and his team did.

>> Honestly, I spend pretty much all my time working on Bun. Uh, yeah, I mostly just work on Bun.

>> They announced Bun 1.0 0 a year later in 2023, Windows support a year after that and have since improved their compatibility with node, added built-in Postgress, MySQL, Reddus clients, and have become one of the most loved tools

in the JavaScript ecosystem. As of

today, Bun gets more than 7 million monthly downloads, has over 83,000 GitHub stars, and most importantly, it has the right primitives in place for AI companies wanting to build with it. But

because the bun team has been so focused on keeping bun as small as possible and since bun apps are able to be compiled into a single executable that contain everything the app needs to run. It's

the perfect tool for building CLIs which is exactly what Anthropic did with Claude code. And with the way things are

Claude code. And with the way things are heading if most new code in the future is being written, tested, and developed by an AI agent. The environment it runs in has to be fast and predictable, which is exactly what Bun offers and why

Anthropic is investing in its infrastructure powering Claude Code and any other future AI products it comes up with. So, if you're a Bun fanboy or a

with. So, if you're a Bun fanboy or a Bun Boy, what does this all mean for you? Well, in an ideal world, the Bun

you? Well, in an ideal world, the Bun team will continue to obsess over building the best JavaScript tooling they can while now not having to worry about their burn rate or pretending like they're eventually going to build some crappy hosting service for their

investors. They've promised that bun

investors. They've promised that bun will remain open source and MIT licensed. It will still be built in

licensed. It will still be built in public. That the same team will continue

public. That the same team will continue to work on it and they won't get soft after they become incredibly rich when Anthropic eventually goes public. But

unfortunately, Anthropic doesn't have the best track record when it comes to open source. Claude Code itself isn't

open source. Claude Code itself isn't even open source, and it wouldn't be the first time a beloved dev tool was sunset after an acquisition. But regardless, in a world where it seems like every startup is just hype marketing or rage

baiting, it feels good to see one of the good ones win. But to get a win like this in the tech space, you need a solid foundation in math and science. And you

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or scan the QR code on screen to get 20% off an annual premium subscription with unlimited daily access. This has been the Code Report. Thanks for watching and I will see you in the next one.