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Quote from the CEO of Anthropic in March 2025: "I think we'll be there in three to six months where AI is writing 90% of the code and then in 12 months we may be in a world where AI is writing essentially all of the code"
Why didn't they just use AI to write their own Bun instead of wasting 8-9 figures on this company? Makes no sense.
Sounds like the goal is to bundle up Bun with Claude Code insanely tightly, to the point where it doesn't matter if you have nodejs installed locally, but also they can optimize key things for Claude Code's Bun runtime as needed. It's a brilliant acquisition, and bun stays open source, which allows it to continue to grow, to Anthropics benefit and everyone else's.
A nice start would probably be for Claude Code to stop trying to use npm when it detects a bun lockfile and vice versa...
This reads more like Anthropic wanted to hire Jarred and Jarred wants to work with AI rather than build a Saas product around bun. I doubt it has anything to do with what is best for bun the project. Considering bun always seemed to value performance more than all else, the only real way for them to continue pursuing that value would be to move into the actual js engine design. This seems like a good pivot for Jarred…
It doesn't read like that to me at all. This reads to me like Anthropic realizing that they have $1bn in annual revenue from Claude Code that's dependent on Bun, and acquiring Bun is a great and comparatively cheap way to remove any risk from that dependency.
This reads more like Anthropic wanted to hire Jarred and Jarred wants to work with AI rather than build a Saas product around bun. I doubt it has anything to do with what is best for bun the project. Considering bun always seemed to value performance more than all else, the only real way for them to continue pursuing that value would be to move into the actual js engine design. This seems like a good pivot for Jarred…
It doesn't read like that to me at all. This reads to me like Anthropic realizing that they have $1bn in annual revenue from Claude Code that's dependent on Bun, and acquiring Bun is a great and comparatively cheap way to remove any risk from that dependency.
Earlier quoted context omitted.
If that was genuinely happening here - Anthropic were selling inference for less than the power and data center costs needed to serve those tokens - it would indeed be a very bad sign for their health. I don't think they're doing that. Estimates I've seen have their inference margin at ~60% - there's one from Morgan Stanley in this article, for example: https://www.businessinsider.com/amazon-anthropic-billions-cl...
>The bank's analysts then assumed Anthropic gross profit margins of 60%, and estimated that 75% of related costs are spent on AWS cloud services. Not estimate, assumption.
This reads more like Anthropic wanted to hire Jarred and Jarred wants to work with AI rather than build a Saas product around bun. I doubt it has anything to do with what is best for bun the project. Considering bun always seemed to value performance more than all else, the only real way for them to continue pursuing that value would be to move into the actual js engine design. This seems like a good pivot for Jarred…
It doesn't read like that to me at all. This reads to me like Anthropic realizing that they have $1bn in annual revenue from Claude Code that's dependent on Bun, and acquiring Bun is a great and comparatively cheap way to remove any risk from that dependency.
Earlier quoted context omitted.
If that was genuinely happening here - Anthropic were selling inference for less than the power and data center costs needed to serve those tokens - it would indeed be a very bad sign for their health. I don't think they're doing that. Estimates I've seen have their inference margin at ~60% - there's one from Morgan Stanley in this article, for example: https://www.businessinsider.com/amazon-anthropic-billions-cl...
They had pretty drastic price cuts on Opus 4.5. It's possible they're now selling inference at a loss to gain market share, or at least that their margins are much lower. Dario claims that all their previous models were profitable (even after accounting for research costs), but it's unclear that there's a path to keeping their previous margins and expanding revenue as fast or faster than their costs (each model has b…
As someone who have been using Deno for the last few years, is there anything that Bun does better? Bun seems to use a different runtime (JSC) which is less tested than V8, which makes me assume it might perform worse in real-world tasks (maybe not anymore?). The last time I checked Bun's source code, it was... quite messy and spaghetti-like, plus Zig doesn't really offer many safety features, so it's not that hard t…
I tried several times to port Node projects to Deno. Each time compatibility had "improved" but I still didn't have a working build after a few days of effort. I don't know how Deno is today. I switched to Bun and porting went a lot smoother. Philosophically, I like that Bun sees Node compatibility as an obvious top priority. Deno sees it as a grudging necessity after losing the fight to do things differently.
Earlier quoted context omitted.
But how is another company that is also VC backed and losing money providing stability for Bun? How long before we hear about “Our Amazing Journey”? On the other hand, I would rather see someone like Bun have a successful exit where the founders seem to have started out with a passion project, got funding, built something out they were excited about and then exit than yet another AI company by non technical founders…
The real risk is not that Anthropic will run out of money, but that they will change their strategy to something that isn't Bun-based, and supporting Bun won't make sense for them any more.
I work on Bun. Happy to answer any questions
Hi Jarred, I contributed to Bun one time for SQLite. I've a question about the licensing. Will each contributor continue to retain their copyright, or will a CLA be introduced? Thanks