Bun is joining Anthropic 🔥

Source: Dev.to

Announcement

Big news – Bun is now joining Anthropic.

According to the official announcement, Anthropic acquired Bun so it can power Claude Code, the Claude Agent SDK, and future AI‑dev tools.
👉 Official News

What This Means for Bun

• Bun – the super‑fast JavaScript/TypeScript runtime, bundler, package manager, and test runner – will now serve as core infrastructure for Anthropic’s developer‑focused AI tools.
• It becomes part of Anthropic’s core engineering stack.
• Bun will directly power Claude Code and future dev tools, delivering faster performance, better developer experience, and more stability.
• Bun stays open source, and Anthropic will invest full‑time engineering support into the project.
• Goal: build a stronger, AI‑supercharged dev workflow.

Community Reaction

Reddit Thread

https://www.reddit.com/r/webdev/comments/1pch41f/bun_is_joining_anthropic/

Top Comments

• “Is this the rug pull people were worried about?”
• “They bought it because it’s critical infrastructure for them.”
• “People are overreacting. It’s not a rug pull.”

Sentiments

Positive outlook

• Some users see this as good for Bun’s long‑term health.
• Appreciation for Bun’s features:
  • Faster installs
  • Less tooling overhead
  • Cleaner experience than Node
  • Good standard library
  • Solid for new projects

Concerns

• Fear it might become paid later (“Bun Pro”).
• Questions about maturity for real‑world teams.
• General skepticism about corporate ownership and potential monetization.

Pros and Cons

Pros

• Stronger engineering support
• Better dev tools powered by AI
• Continued open‑source status
• Performance gains

Cons

• Fear of future monetization
• Shift to corporate ownership
• Optimization primarily for Anthropic’s needs
• Maturity concerns

Outlook

If Anthropic keeps Bun open‑source and improves stability, we could see a new era of:

• Faster development workflows
• AI‑first tooling
• Modern runtimes built for real projects

The concerns are real—nobody wants to wake up one day and find half the runtime behind a paywall. For now, the prospect of Bun growing with Anthropic’s backing is exciting.

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What do you think? Is this a good deal or another free tool destined to become paid? Share your thoughts in the comments.

Happy coding!