Dev Ecosystem Rocked: Bun Acquired by Anthropic as OpenAI Declares 'Code Red'

The high-performance JavaScript runtime, bundler, and package manager, Bun, has been acquired by Anthropic. This strategic move aims to integrate Bun as core infrastructure for Anthropic’s Claude Code, Agent SDK, and future AI coding tools. Anthropic has committed to keeping Bun open source under the MIT license, with its original team continuing development, thereby addressing previous concerns about Bun’s long-term monetization and stability. This integration is expected to accelerate Bun’s roadmap, emphasizing Node.js compatibility and an enhanced developer experience, though some community members express skepticism regarding the long-term preservation of its open-source nature.

Concurrently, OpenAI CEO Sam Altman has reportedly issued an internal ‘Code Red’ for ChatGPT, prioritizing its speed, reliability, and personalization features. This directive, which involves delaying other product developments, signals heightened competitive pressure, particularly from Google’s Gemini 3 Pro and the growing influence of open-weight models. The broader AI landscape reveals intense competition, with Chinese labs such as Deepseek and Moonshot demonstrating leadership in high-parameter open-weight models. These models are often released to foster trust and relevance globally, circumventing geopolitical restrictions on Chinese-hosted services. OpenAI’s open-weight strategy, exemplified by GPTOSS, focuses on consumer-grade local inference, showcasing a diversified approach within the rapidly evolving LLM ecosystem.